* [PATCHv2 00/36] libperf: Add sampling interface
@ 2019-10-07 12:53 Jiri Olsa
2019-10-07 12:53 ` [PATCH 01/36] libperf: Add perf_mmap__init() function Jiri Olsa
` (35 more replies)
0 siblings, 36 replies; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: Kan Liang, Steven Rostedt, Adrian Hunter, Ian Rogers,
Stephane Eranian, Song Liu, Alexey Budankov, Andi Kleen, lkml,
Ingo Molnar, Namhyung Kim, Alexander Shishkin, Peter Zijlstra,
Michael Petlan
hi,
sending changes for exporting basic sampling interface
in libperf. It's now possible to use following code in
applications via libperf:
--- (example is without error checks for simplicity)
struct perf_event_attr attr = {
.type = PERF_TYPE_TRACEPOINT,
.sample_period = 1,
.wakeup_watermark = 1,
.disabled = 1,
};
/* ... setup attr */
cpus = perf_cpu_map__new(NULL);
evlist = perf_evlist__new();
evsel = perf_evsel__new(&attr);
perf_evlist__add(evlist, evsel);
perf_evlist__set_maps(evlist, cpus, NULL);
err = perf_evlist__open(evlist);
err = perf_evlist__mmap(evlist, 4);
err = perf_evlist__enable(evlist);
/* ... monitored area, plus all the other cpus */
err = perf_evlist__disable(evlist);
perf_evlist__for_each_mmap(evlist, map) {
if (perf_mmap__read_init(map) < 0)
continue;
while ((event = perf_mmap__read_event(map)) != NULL) {
perf_mmap__consume(map);
}
perf_mmap__read_done(map);
}
perf_evlist__delete(evlist);
perf_cpu_map__put(cpus);
--- (end)
Nothing is carved in stone so far, the interface is exported
as is available in perf now and we can change it as we want.
New tests are added in test-evlist.c to do thread and cpu based
sampling.
All the functionality should not change, however there's considerable
mmap code rewrite.
Now we have perf_evlist__mmap_ops called by both perf and libperf
mmaps functions with specific 'struct perf_evlist_mmap_ops'
callbacks:
- get - to get mmap object, both libperf and perf use different
objects, because perf needs to carry more data for aio,
compression and auxtrace
- mmap - to actually mmap the object, it's simple mmap for libperf,
but more work for perf wrt aio, compression and auxtrace
- idx - callback to get current IDs, used only in perf for auxtrace
setup
It would be great if guys could run your usual workloads to see if all
is fine.. so far so good in my tests ;-)
It's also available in here:
git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
perf/lib
v2 changes:
- rebased to latest perf/core
- portion of patches already taken
- explained mmap refcnt management in following patch changelog:
libperf: Centralize map refcnt setting
thanks,
jirka
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Song Liu <songliubraving@fb.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
---
Jiri Olsa (36):
libperf: Add perf_mmap__init() function
libperf: Add 'struct perf_mmap_param'
libperf: Add perf_mmap__mmap_len() function
libperf: Add perf_mmap__mmap() function
libperf: Add perf_mmap__get() function
libperf: Add perf_mmap__unmap() function
libperf: Add perf_mmap__put() function
perf tools: Use perf_mmap way to detect aux mmap
libperf: Add perf_mmap__consume() function
libperf: Add perf_mmap__read_init() function
libperf: Add perf_mmap__read_done() function
libperf: Add perf_mmap__read_event() function
libperf: Add perf_evlist__mmap()/munmap() functions
libperf: Add perf_evlist__mmap_ops function
libperf: Add perf_evlist_mmap_ops::idx callback
libperf: Add perf_evlist_mmap_ops::get callback
libperf: Add perf_evlist_mmap_ops::mmap callback
perf tools: Add perf_evlist__mmap_cb_idx function
perf tools: Add perf_evlist__mmap_cb_get function
perf tools: Add perf_evlist__mmap_cb_mmap function
perf tools: Switch to libperf mmap interface
libperf: Centralize map refcnt setting
libperf: Move pollfd allocation to libperf
libperf: Add perf_evlist__exit function
libperf: Add perf_evlist__purge function
libperf: Add perf_evlist__filter_pollfd function
libperf: Add perf_evlist__for_each_mmap function
libperf: Move mmap allocation to perf_evlist__mmap_ops::get
libperf: Move mask setup to perf_evlist__mmap_ops function
libperf: Link static tests with libapi.a
libperf: Add _GNU_SOURCE define to compilation
libperf: Add tests_mmap_thread test
libperf: Add tests_mmap_cpus test
libperf: Keep count of failed tests
libperf: Do not export perf_evsel__init/perf_evlist__init
libperf: Add pr_err macro
tools/perf/arch/x86/tests/perf-time-to-tsc.c | 9 ++--
tools/perf/builtin-kvm.c | 11 ++---
tools/perf/builtin-record.c | 10 ++---
tools/perf/builtin-top.c | 9 ++--
tools/perf/builtin-trace.c | 9 ++--
tools/perf/lib/Build | 1 +
tools/perf/lib/Makefile | 7 +++-
tools/perf/lib/evlist.c | 357 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
tools/perf/lib/include/internal/evlist.h | 43 ++++++++++++++++++++
tools/perf/lib/include/internal/evsel.h | 1 +
tools/perf/lib/include/internal/mmap.h | 46 ++++++++++++++++-----
tools/perf/lib/include/internal/tests.h | 20 +++++++--
tools/perf/lib/include/perf/core.h | 3 ++
tools/perf/lib/include/perf/evlist.h | 15 ++++++-
tools/perf/lib/include/perf/evsel.h | 2 -
tools/perf/lib/include/perf/mmap.h | 14 +++++++
tools/perf/lib/internal.h | 5 +++
tools/perf/lib/libperf.map | 10 ++++-
tools/perf/lib/mmap.c | 274 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
tools/perf/lib/tests/Makefile | 8 ++--
tools/perf/lib/tests/test-cpumap.c | 2 +-
tools/perf/lib/tests/test-evlist.c | 218 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
tools/perf/lib/tests/test-evsel.c | 2 +-
tools/perf/lib/tests/test-threadmap.c | 2 +-
tools/perf/tests/backward-ring-buffer.c | 7 ++--
tools/perf/tests/bpf.c | 7 ++--
tools/perf/tests/code-reading.c | 9 ++--
tools/perf/tests/keep-tracking.c | 9 ++--
tools/perf/tests/mmap-basic.c | 9 ++--
tools/perf/tests/openat-syscall-tp-fields.c | 9 ++--
tools/perf/tests/perf-record.c | 9 ++--
tools/perf/tests/sw-clock.c | 9 ++--
tools/perf/tests/switch-tracking.c | 9 ++--
tools/perf/tests/task-exit.c | 9 ++--
tools/perf/util/evlist.c | 256 +++++++++++++++++++++++++++---------------------------------------------------------------------------------------
tools/perf/util/mmap.c | 260 +++++++-------------------------------------------------------------------------------------------------------------
tools/perf/util/mmap.h | 28 +++----------
tools/perf/util/python.c | 7 ++--
38 files changed, 1161 insertions(+), 554 deletions(-)
create mode 100644 tools/perf/lib/include/perf/mmap.h
create mode 100644 tools/perf/lib/mmap.c
^ permalink raw reply [flat|nested] 69+ messages in thread
* [PATCH 01/36] libperf: Add perf_mmap__init() function
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] " tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 02/36] libperf: Add 'struct perf_mmap_param' Jiri Olsa
` (34 subsequent siblings)
35 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: Alexander Shishkin, Michael Petlan, Namhyung Kim, Peter Zijlstra,
lkml, Ingo Molnar
Add perf_mmap__init() function to initialize 'struct perf_mmap' object.
Add it to a new mmap.c object, that will carry all the mmap related
functions.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lore.kernel.org/lkml/20190913132355.21634-40-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/lib/Build | 1 +
tools/perf/lib/include/internal/mmap.h | 2 ++
tools/perf/lib/mmap.c | 9 +++++++++
tools/perf/util/evlist.c | 5 ++---
4 files changed, 14 insertions(+), 3 deletions(-)
create mode 100644 tools/perf/lib/mmap.c
diff --git a/tools/perf/lib/Build b/tools/perf/lib/Build
index c31f1c111f8f..2ef9a4ec6d99 100644
--- a/tools/perf/lib/Build
+++ b/tools/perf/lib/Build
@@ -3,6 +3,7 @@ libperf-y += cpumap.o
libperf-y += threadmap.o
libperf-y += evsel.o
libperf-y += evlist.o
+libperf-y += mmap.o
libperf-y += zalloc.o
libperf-y += xyarray.o
libperf-y += lib.o
diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
index ba1e519c15b9..e25890de6a55 100644
--- a/tools/perf/lib/include/internal/mmap.h
+++ b/tools/perf/lib/include/internal/mmap.h
@@ -29,4 +29,6 @@ struct perf_mmap {
char event_copy[PERF_SAMPLE_MAX_SIZE] __aligned(8);
};
+void perf_mmap__init(struct perf_mmap *map, bool overwrite);
+
#endif /* __LIBPERF_INTERNAL_MMAP_H */
diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
new file mode 100644
index 000000000000..3da6177510e6
--- /dev/null
+++ b/tools/perf/lib/mmap.c
@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <internal/mmap.h>
+
+void perf_mmap__init(struct perf_mmap *map, bool overwrite)
+{
+ map->fd = -1;
+ map->overwrite = overwrite;
+ refcount_set(&map->refcnt, 0);
+}
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index d277a98e62df..633a407b1294 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -605,8 +605,6 @@ static struct mmap *evlist__alloc_mmap(struct evlist *evlist,
return NULL;
for (i = 0; i < evlist->core.nr_mmaps; i++) {
- map[i].core.fd = -1;
- map[i].core.overwrite = overwrite;
/*
* When the perf_mmap() call is made we grab one refcount, plus
* one extra to let perf_mmap__consume() get the last
@@ -616,8 +614,9 @@ static struct mmap *evlist__alloc_mmap(struct evlist *evlist,
* Each PERF_EVENT_IOC_SET_OUTPUT points to this mmap and
* thus does perf_mmap__get() on it.
*/
- refcount_set(&map[i].core.refcnt, 0);
+ perf_mmap__init(&map[i].core, overwrite);
}
+
return map;
}
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 02/36] libperf: Add 'struct perf_mmap_param'
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
2019-10-07 12:53 ` [PATCH 01/36] libperf: Add perf_mmap__init() function Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] " tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 03/36] libperf: Add perf_mmap__mmap_len() function Jiri Olsa
` (33 subsequent siblings)
35 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: Alexander Shishkin, Michael Petlan, Namhyung Kim, Peter Zijlstra,
lkml, Ingo Molnar
Add libperf's version of mmap params 'struct perf_mmap_param' object
with the basics: 'prot' and 'mask'. Encapsulate it in the current
'struct mmap_params' object.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lore.kernel.org/lkml/20190913132355.21634-41-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/lib/include/internal/mmap.h | 5 +++++
tools/perf/util/evlist.c | 14 +++++++++-----
tools/perf/util/mmap.c | 4 ++--
tools/perf/util/mmap.h | 3 ++-
4 files changed, 18 insertions(+), 8 deletions(-)
diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
index e25890de6a55..b26806b36bb6 100644
--- a/tools/perf/lib/include/internal/mmap.h
+++ b/tools/perf/lib/include/internal/mmap.h
@@ -29,6 +29,11 @@ struct perf_mmap {
char event_copy[PERF_SAMPLE_MAX_SIZE] __aligned(8);
};
+struct perf_mmap_param {
+ int prot;
+ int mask;
+};
+
void perf_mmap__init(struct perf_mmap *map, bool overwrite);
#endif /* __LIBPERF_INTERNAL_MMAP_H */
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 633a407b1294..666339d4d1cd 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -643,7 +643,7 @@ static int evlist__mmap_per_evsel(struct evlist *evlist, int idx,
int fd;
int cpu;
- mp->prot = PROT_READ | PROT_WRITE;
+ mp->core.prot = PROT_READ | PROT_WRITE;
if (evsel->core.attr.write_backward) {
output = _output_overwrite;
maps = evlist->overwrite_mmap;
@@ -656,7 +656,7 @@ static int evlist__mmap_per_evsel(struct evlist *evlist, int idx,
if (evlist->bkw_mmap_state == BKW_MMAP_NOTREADY)
perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING);
}
- mp->prot &= ~PROT_WRITE;
+ mp->core.prot &= ~PROT_WRITE;
}
if (evsel->core.system_wide && thread)
@@ -897,8 +897,12 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
* Its value is decided by evsel's write_backward.
* So &mp should not be passed through const pointer.
*/
- struct mmap_params mp = { .nr_cblocks = nr_cblocks, .affinity = affinity, .flush = flush,
- .comp_level = comp_level };
+ struct mmap_params mp = {
+ .nr_cblocks = nr_cblocks,
+ .affinity = affinity,
+ .flush = flush,
+ .comp_level = comp_level
+ };
if (!evlist->mmap)
evlist->mmap = evlist__alloc_mmap(evlist, false);
@@ -910,7 +914,7 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
evlist->core.mmap_len = evlist__mmap_size(pages);
pr_debug("mmap size %zuB\n", evlist->core.mmap_len);
- mp.mask = evlist->core.mmap_len - page_size - 1;
+ mp.core.mask = evlist->core.mmap_len - page_size - 1;
auxtrace_mmap_params__init(&mp.auxtrace_mp, evlist->core.mmap_len,
auxtrace_pages, auxtrace_overwrite);
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index a35dc57d5995..a496ced5ed2a 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -370,8 +370,8 @@ int perf_mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu)
*/
refcount_set(&map->core.refcnt, 2);
map->core.prev = 0;
- map->core.mask = mp->mask;
- map->core.base = mmap(NULL, perf_mmap__mmap_len(map), mp->prot,
+ map->core.mask = mp->core.mask;
+ map->core.base = mmap(NULL, perf_mmap__mmap_len(map), mp->core.prot,
MAP_SHARED, fd, 0);
if (map->core.base == MAP_FAILED) {
pr_debug2("failed to mmap perf event ring buffer, error %d\n",
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index e567c1c875bd..4ff75d8aeb05 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -37,7 +37,8 @@ struct mmap {
};
struct mmap_params {
- int prot, mask, nr_cblocks, affinity, flush, comp_level;
+ struct perf_mmap_param core;
+ int nr_cblocks, affinity, flush, comp_level;
struct auxtrace_mmap_params auxtrace_mp;
};
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 03/36] libperf: Add perf_mmap__mmap_len() function
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
2019-10-07 12:53 ` [PATCH 01/36] libperf: Add perf_mmap__init() function Jiri Olsa
2019-10-07 12:53 ` [PATCH 02/36] libperf: Add 'struct perf_mmap_param' Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Adopt perf_mmap__mmap_len() function from tools/perf tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 04/36] libperf: Add perf_mmap__mmap() function Jiri Olsa
` (32 subsequent siblings)
35 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: Alexander Shishkin, Michael Petlan, Namhyung Kim, Peter Zijlstra,
lkml, Ingo Molnar
Move perf_mmap__mmap_len() from tools/perf wto libperf, it will be used
in the following patches. And rename the existing perf's function to
mmap__mmap_len().
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lore.kernel.org/lkml/20190913132355.21634-42-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-record.c | 4 ++--
tools/perf/lib/include/internal/mmap.h | 2 ++
tools/perf/lib/mmap.c | 6 ++++++
tools/perf/util/mmap.c | 20 ++++++++++----------
tools/perf/util/mmap.h | 2 +-
5 files changed, 21 insertions(+), 13 deletions(-)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 23332861de6e..f05e8b7955e4 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -276,7 +276,7 @@ static int record__aio_pushfn(struct mmap *map, void *to, void *buf, size_t size
if (record__comp_enabled(aio->rec)) {
size = zstd_compress(aio->rec->session, aio->data + aio->size,
- perf_mmap__mmap_len(map) - aio->size,
+ mmap__mmap_len(map) - aio->size,
buf, size);
} else {
memcpy(aio->data + aio->size, buf, size);
@@ -488,7 +488,7 @@ static int record__pushfn(struct mmap *map, void *to, void *bf, size_t size)
struct record *rec = to;
if (record__comp_enabled(rec)) {
- size = zstd_compress(rec->session, map->data, perf_mmap__mmap_len(map), bf, size);
+ size = zstd_compress(rec->session, map->data, mmap__mmap_len(map), bf, size);
bf = map->data;
}
diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
index b26806b36bb6..e7a67260940c 100644
--- a/tools/perf/lib/include/internal/mmap.h
+++ b/tools/perf/lib/include/internal/mmap.h
@@ -34,6 +34,8 @@ struct perf_mmap_param {
int mask;
};
+size_t perf_mmap__mmap_len(struct perf_mmap *map);
+
void perf_mmap__init(struct perf_mmap *map, bool overwrite);
#endif /* __LIBPERF_INTERNAL_MMAP_H */
diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
index 3da6177510e6..cc4284da4d99 100644
--- a/tools/perf/lib/mmap.c
+++ b/tools/perf/lib/mmap.c
@@ -1,5 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
#include <internal/mmap.h>
+#include <internal/lib.h>
void perf_mmap__init(struct perf_mmap *map, bool overwrite)
{
@@ -7,3 +8,8 @@ void perf_mmap__init(struct perf_mmap *map, bool overwrite)
map->overwrite = overwrite;
refcount_set(&map->refcnt, 0);
}
+
+size_t perf_mmap__mmap_len(struct perf_mmap *map)
+{
+ return map->mask + 1 + page_size;
+}
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index a496ced5ed2a..a8e81c4cbae8 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -23,9 +23,9 @@
#include "../perf.h"
#include <internal/lib.h> /* page_size */
-size_t perf_mmap__mmap_len(struct mmap *map)
+size_t mmap__mmap_len(struct mmap *map)
{
- return map->core.mask + 1 + page_size;
+ return perf_mmap__mmap_len(&map->core);
}
/* When check_messup is true, 'end' must points to a good entry */
@@ -170,7 +170,7 @@ static int perf_mmap__aio_enabled(struct mmap *map)
#ifdef HAVE_LIBNUMA_SUPPORT
static int perf_mmap__aio_alloc(struct mmap *map, int idx)
{
- map->aio.data[idx] = mmap(NULL, perf_mmap__mmap_len(map), PROT_READ|PROT_WRITE,
+ map->aio.data[idx] = mmap(NULL, mmap__mmap_len(map), PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
if (map->aio.data[idx] == MAP_FAILED) {
map->aio.data[idx] = NULL;
@@ -183,7 +183,7 @@ static int perf_mmap__aio_alloc(struct mmap *map, int idx)
static void perf_mmap__aio_free(struct mmap *map, int idx)
{
if (map->aio.data[idx]) {
- munmap(map->aio.data[idx], perf_mmap__mmap_len(map));
+ munmap(map->aio.data[idx], mmap__mmap_len(map));
map->aio.data[idx] = NULL;
}
}
@@ -196,7 +196,7 @@ static int perf_mmap__aio_bind(struct mmap *map, int idx, int cpu, int affinity)
if (affinity != PERF_AFFINITY_SYS && cpu__max_node() > 1) {
data = map->aio.data[idx];
- mmap_len = perf_mmap__mmap_len(map);
+ mmap_len = mmap__mmap_len(map);
node_mask = 1UL << cpu__get_node(cpu);
if (mbind(data, mmap_len, MPOL_BIND, &node_mask, 1, 0)) {
pr_err("Failed to bind [%p-%p] AIO buffer to node %d: error %m\n",
@@ -210,7 +210,7 @@ static int perf_mmap__aio_bind(struct mmap *map, int idx, int cpu, int affinity)
#else /* !HAVE_LIBNUMA_SUPPORT */
static int perf_mmap__aio_alloc(struct mmap *map, int idx)
{
- map->aio.data[idx] = malloc(perf_mmap__mmap_len(map));
+ map->aio.data[idx] = malloc(mmap__mmap_len(map));
if (map->aio.data[idx] == NULL)
return -1;
@@ -315,11 +315,11 @@ void perf_mmap__munmap(struct mmap *map)
{
perf_mmap__aio_munmap(map);
if (map->data != NULL) {
- munmap(map->data, perf_mmap__mmap_len(map));
+ munmap(map->data, mmap__mmap_len(map));
map->data = NULL;
}
if (map->core.base != NULL) {
- munmap(map->core.base, perf_mmap__mmap_len(map));
+ munmap(map->core.base, mmap__mmap_len(map));
map->core.base = NULL;
map->core.fd = -1;
refcount_set(&map->core.refcnt, 0);
@@ -371,7 +371,7 @@ int perf_mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu)
refcount_set(&map->core.refcnt, 2);
map->core.prev = 0;
map->core.mask = mp->core.mask;
- map->core.base = mmap(NULL, perf_mmap__mmap_len(map), mp->core.prot,
+ map->core.base = mmap(NULL, mmap__mmap_len(map), mp->core.prot,
MAP_SHARED, fd, 0);
if (map->core.base == MAP_FAILED) {
pr_debug2("failed to mmap perf event ring buffer, error %d\n",
@@ -389,7 +389,7 @@ int perf_mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu)
map->comp_level = mp->comp_level;
if (map->comp_level && !perf_mmap__aio_enabled(map)) {
- map->data = mmap(NULL, perf_mmap__mmap_len(map), PROT_READ|PROT_WRITE,
+ map->data = mmap(NULL, mmap__mmap_len(map), PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
if (map->data == MAP_FAILED) {
pr_debug2("failed to mmap data buffer, error %d\n",
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index 4ff75d8aeb05..2b97dc6d9ee2 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -67,7 +67,7 @@ union perf_event *perf_mmap__read_event(struct mmap *map);
int perf_mmap__push(struct mmap *md, void *to,
int push(struct mmap *map, void *to, void *buf, size_t size));
-size_t perf_mmap__mmap_len(struct mmap *map);
+size_t mmap__mmap_len(struct mmap *map);
int perf_mmap__read_init(struct mmap *md);
void perf_mmap__read_done(struct mmap *map);
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 04/36] libperf: Add perf_mmap__mmap() function
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (2 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 03/36] libperf: Add perf_mmap__mmap_len() function Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Adopt perf_mmap__mmap() function from tools/perf tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 05/36] libperf: Add perf_mmap__get() function Jiri Olsa
` (31 subsequent siblings)
35 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: Alexander Shishkin, Michael Petlan, Namhyung Kim, Peter Zijlstra,
lkml, Ingo Molnar
Move perf_mmap__mmap() from tools/perf to libperf, it will be used in
the following patches. And rename the existing perf's function to
mmap__mmap().
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lore.kernel.org/lkml/20190913132355.21634-43-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/lib/include/internal/mmap.h | 2 ++
tools/perf/lib/mmap.c | 18 ++++++++++++++++++
tools/perf/util/evlist.c | 2 +-
tools/perf/util/mmap.c | 12 +++---------
tools/perf/util/mmap.h | 2 +-
5 files changed, 25 insertions(+), 11 deletions(-)
diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
index e7a67260940c..7067b70c6f61 100644
--- a/tools/perf/lib/include/internal/mmap.h
+++ b/tools/perf/lib/include/internal/mmap.h
@@ -37,5 +37,7 @@ struct perf_mmap_param {
size_t perf_mmap__mmap_len(struct perf_mmap *map);
void perf_mmap__init(struct perf_mmap *map, bool overwrite);
+int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
+ int fd, int cpu);
#endif /* __LIBPERF_INTERNAL_MMAP_H */
diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
index cc4284da4d99..b216a7db857f 100644
--- a/tools/perf/lib/mmap.c
+++ b/tools/perf/lib/mmap.c
@@ -1,4 +1,5 @@
// SPDX-License-Identifier: GPL-2.0
+#include <sys/mman.h>
#include <internal/mmap.h>
#include <internal/lib.h>
@@ -13,3 +14,20 @@ size_t perf_mmap__mmap_len(struct perf_mmap *map)
{
return map->mask + 1 + page_size;
}
+
+int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
+ int fd, int cpu)
+{
+ map->prev = 0;
+ map->mask = mp->mask;
+ map->base = mmap(NULL, perf_mmap__mmap_len(map), mp->prot,
+ MAP_SHARED, fd, 0);
+ if (map->base == MAP_FAILED) {
+ map->base = NULL;
+ return -1;
+ }
+
+ map->fd = fd;
+ map->cpu = cpu;
+ return 0;
+}
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 666339d4d1cd..055f625dc630 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -671,7 +671,7 @@ static int evlist__mmap_per_evsel(struct evlist *evlist, int idx,
if (*output == -1) {
*output = fd;
- if (perf_mmap__mmap(&maps[idx], mp, *output, evlist_cpu) < 0)
+ if (mmap__mmap(&maps[idx], mp, *output, evlist_cpu) < 0)
return -1;
} else {
if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0)
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index a8e81c4cbae8..acef6e3f6b80 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -353,7 +353,7 @@ static void perf_mmap__setup_affinity_mask(struct mmap *map, struct mmap_params
CPU_SET(map->core.cpu, &map->affinity_mask);
}
-int perf_mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu)
+int mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu)
{
/*
* The last one will be done at perf_mmap__consume(), so that we
@@ -369,18 +369,12 @@ int perf_mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu)
* perf_evlist__filter_pollfd().
*/
refcount_set(&map->core.refcnt, 2);
- map->core.prev = 0;
- map->core.mask = mp->core.mask;
- map->core.base = mmap(NULL, mmap__mmap_len(map), mp->core.prot,
- MAP_SHARED, fd, 0);
- if (map->core.base == MAP_FAILED) {
+
+ if (perf_mmap__mmap(&map->core, &mp->core, fd, cpu)) {
pr_debug2("failed to mmap perf event ring buffer, error %d\n",
errno);
- map->core.base = NULL;
return -1;
}
- map->core.fd = fd;
- map->core.cpu = cpu;
perf_mmap__setup_affinity_mask(map, mp);
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index 2b97dc6d9ee2..a60e6ead7255 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -42,7 +42,7 @@ struct mmap_params {
struct auxtrace_mmap_params auxtrace_mp;
};
-int perf_mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu);
+int mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu);
void perf_mmap__munmap(struct mmap *map);
void perf_mmap__get(struct mmap *map);
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 05/36] libperf: Add perf_mmap__get() function
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (3 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 04/36] libperf: Add perf_mmap__mmap() function Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Adopt perf_mmap__get() function from tools/perf tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 06/36] libperf: Add perf_mmap__unmap() function Jiri Olsa
` (30 subsequent siblings)
35 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: Alexander Shishkin, Michael Petlan, Namhyung Kim, Peter Zijlstra,
lkml, Ingo Molnar
Move perf_mmap__get() from tools/perf to libperf in the internal header
internal/mmap.h.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lore.kernel.org/lkml/20190913132355.21634-44-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-record.c | 2 +-
tools/perf/lib/include/internal/mmap.h | 1 +
tools/perf/lib/mmap.c | 5 +++++
tools/perf/util/evlist.c | 2 +-
tools/perf/util/mmap.c | 5 -----
tools/perf/util/mmap.h | 1 -
6 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index f05e8b7955e4..025a12b57325 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -293,7 +293,7 @@ static int record__aio_pushfn(struct mmap *map, void *to, void *buf, size_t size
* after started aio request completion or at record__aio_push()
* if the request failed to start.
*/
- perf_mmap__get(map);
+ perf_mmap__get(&map->core);
}
aio->size += size;
diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
index 7067b70c6f61..2e68974bffb4 100644
--- a/tools/perf/lib/include/internal/mmap.h
+++ b/tools/perf/lib/include/internal/mmap.h
@@ -39,5 +39,6 @@ size_t perf_mmap__mmap_len(struct perf_mmap *map);
void perf_mmap__init(struct perf_mmap *map, bool overwrite);
int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
int fd, int cpu);
+void perf_mmap__get(struct perf_mmap *map);
#endif /* __LIBPERF_INTERNAL_MMAP_H */
diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
index b216a7db857f..b765e0505bb6 100644
--- a/tools/perf/lib/mmap.c
+++ b/tools/perf/lib/mmap.c
@@ -31,3 +31,8 @@ int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
map->cpu = cpu;
return 0;
}
+
+void perf_mmap__get(struct perf_mmap *map)
+{
+ refcount_inc(&map->refcnt);
+}
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 055f625dc630..a7ba22e18e7b 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -677,7 +677,7 @@ static int evlist__mmap_per_evsel(struct evlist *evlist, int idx,
if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0)
return -1;
- perf_mmap__get(&maps[idx]);
+ perf_mmap__get(&maps[idx].core);
}
revent = perf_evlist__should_poll(evlist, evsel) ? POLLIN : 0;
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index acef6e3f6b80..be691b58d8ab 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -110,11 +110,6 @@ static bool perf_mmap__empty(struct mmap *map)
return perf_mmap__read_head(map) == map->core.prev && !map->auxtrace_mmap.base;
}
-void perf_mmap__get(struct mmap *map)
-{
- refcount_inc(&map->core.refcnt);
-}
-
void perf_mmap__put(struct mmap *map)
{
BUG_ON(map->core.base && refcount_read(&map->core.refcnt) == 0);
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index a60e6ead7255..a73402ee8fe0 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -45,7 +45,6 @@ struct mmap_params {
int mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu);
void perf_mmap__munmap(struct mmap *map);
-void perf_mmap__get(struct mmap *map);
void perf_mmap__put(struct mmap *map);
void perf_mmap__consume(struct mmap *map);
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 06/36] libperf: Add perf_mmap__unmap() function
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (4 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 05/36] libperf: Add perf_mmap__get() function Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Adopt perf_mmap__unmap() function from tools/perf tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 07/36] libperf: Add perf_mmap__put() function Jiri Olsa
` (29 subsequent siblings)
35 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: Alexander Shishkin, Michael Petlan, Namhyung Kim, Peter Zijlstra,
lkml, Ingo Molnar
Move perf_mmap__unmap() from tools/perf to libperf, to internal header
internal/mmap.h. It will be used in the following patches. And rename
the existing perf's function to mmap__munmap().
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lore.kernel.org/lkml/20190913132355.21634-45-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/lib/include/internal/mmap.h | 1 +
tools/perf/lib/mmap.c | 10 ++++++++++
tools/perf/util/evlist.c | 4 ++--
tools/perf/util/mmap.c | 11 +++--------
tools/perf/util/mmap.h | 2 +-
5 files changed, 17 insertions(+), 11 deletions(-)
diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
index 2e68974bffb4..5c2ca9ab12cd 100644
--- a/tools/perf/lib/include/internal/mmap.h
+++ b/tools/perf/lib/include/internal/mmap.h
@@ -39,6 +39,7 @@ size_t perf_mmap__mmap_len(struct perf_mmap *map);
void perf_mmap__init(struct perf_mmap *map, bool overwrite);
int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
int fd, int cpu);
+void perf_mmap__munmap(struct perf_mmap *map);
void perf_mmap__get(struct perf_mmap *map);
#endif /* __LIBPERF_INTERNAL_MMAP_H */
diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
index b765e0505bb6..6eb228d89206 100644
--- a/tools/perf/lib/mmap.c
+++ b/tools/perf/lib/mmap.c
@@ -32,6 +32,16 @@ int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
return 0;
}
+void perf_mmap__munmap(struct perf_mmap *map)
+{
+ if (map && map->base != NULL) {
+ munmap(map->base, perf_mmap__mmap_len(map));
+ map->base = NULL;
+ map->fd = -1;
+ refcount_set(&map->refcnt, 0);
+ }
+}
+
void perf_mmap__get(struct perf_mmap *map)
{
refcount_inc(&map->refcnt);
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index a7ba22e18e7b..2e5eaac6325e 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -577,11 +577,11 @@ static void evlist__munmap_nofree(struct evlist *evlist)
if (evlist->mmap)
for (i = 0; i < evlist->core.nr_mmaps; i++)
- perf_mmap__munmap(&evlist->mmap[i]);
+ mmap__munmap(&evlist->mmap[i]);
if (evlist->overwrite_mmap)
for (i = 0; i < evlist->core.nr_mmaps; i++)
- perf_mmap__munmap(&evlist->overwrite_mmap[i]);
+ mmap__munmap(&evlist->overwrite_mmap[i]);
}
void evlist__munmap(struct evlist *evlist)
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index be691b58d8ab..2c73b5bcf74e 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -115,7 +115,7 @@ void perf_mmap__put(struct mmap *map)
BUG_ON(map->core.base && refcount_read(&map->core.refcnt) == 0);
if (refcount_dec_and_test(&map->core.refcnt))
- perf_mmap__munmap(map);
+ mmap__munmap(map);
}
void perf_mmap__consume(struct mmap *map)
@@ -306,19 +306,14 @@ static void perf_mmap__aio_munmap(struct mmap *map __maybe_unused)
}
#endif
-void perf_mmap__munmap(struct mmap *map)
+void mmap__munmap(struct mmap *map)
{
+ perf_mmap__munmap(&map->core);
perf_mmap__aio_munmap(map);
if (map->data != NULL) {
munmap(map->data, mmap__mmap_len(map));
map->data = NULL;
}
- if (map->core.base != NULL) {
- munmap(map->core.base, mmap__mmap_len(map));
- map->core.base = NULL;
- map->core.fd = -1;
- refcount_set(&map->core.refcnt, 0);
- }
auxtrace_mmap__munmap(&map->auxtrace_mmap);
}
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index a73402ee8fe0..6a18b2990059 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -43,7 +43,7 @@ struct mmap_params {
};
int mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu);
-void perf_mmap__munmap(struct mmap *map);
+void mmap__munmap(struct mmap *map);
void perf_mmap__put(struct mmap *map);
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 07/36] libperf: Add perf_mmap__put() function
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (5 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 06/36] libperf: Add perf_mmap__unmap() function Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-10 13:11 ` Arnaldo Carvalho de Melo
2019-10-15 5:31 ` [tip: perf/core] libperf: Adopt perf_mmap__put() function from tools/perf tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 08/36] perf tools: Use perf_mmap way to detect aux mmap Jiri Olsa
` (28 subsequent siblings)
35 siblings, 2 replies; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: Alexander Shishkin, Michael Petlan, Namhyung Kim, Peter Zijlstra,
lkml, Ingo Molnar
Move perf_mmap__put() from tools/perf to libperf.
Once perf_mmap__put() is moved, we need a way to call application related
unmap code (AIO and aux related code for eprf), when the map goes away.
Add the perf_mmap::unmap callback to do that.
The unmap path from perf is:
perf_mmap__put (libperf)
perf_mmap__munmap (libperf)
map->unmap_cb -> perf_mmap__unmap_cb (perf)
mmap__munmap (perf)
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lore.kernel.org/lkml/20190913132355.21634-46-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-record.c | 4 ++--
tools/perf/lib/include/internal/mmap.h | 31 ++++++++++++++++----------
tools/perf/lib/mmap.c | 14 +++++++++++-
tools/perf/util/evlist.c | 17 +++++++++-----
tools/perf/util/mmap.c | 11 +--------
tools/perf/util/mmap.h | 2 --
6 files changed, 47 insertions(+), 32 deletions(-)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 025a12b57325..2fb83aabbef5 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -197,7 +197,7 @@ static int record__aio_complete(struct mmap *md, struct aiocb *cblock)
* every aio write request started in record__aio_push() so
* decrement it because the request is now complete.
*/
- perf_mmap__put(md);
+ perf_mmap__put(&md->core);
rc = 1;
} else {
/*
@@ -332,7 +332,7 @@ static int record__aio_push(struct record *rec, struct mmap *map, off_t *off)
* map->refcount is decremented in record__aio_complete() after
* aio write operation finishes successfully.
*/
- perf_mmap__put(map);
+ perf_mmap__put(&map->core);
}
return ret;
diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
index 5c2ca9ab12cd..bf9cc7d005ab 100644
--- a/tools/perf/lib/include/internal/mmap.h
+++ b/tools/perf/lib/include/internal/mmap.h
@@ -10,23 +10,28 @@
/* perf sample has 16 bits size limit */
#define PERF_SAMPLE_MAX_SIZE (1 << 16)
+struct perf_mmap;
+
+typedef void (*libperf_unmap_cb_t)(struct perf_mmap *map);
+
/**
* struct perf_mmap - perf's ring buffer mmap details
*
* @refcnt - e.g. code using PERF_EVENT_IOC_SET_OUTPUT to share this
*/
struct perf_mmap {
- void *base;
- int mask;
- int fd;
- int cpu;
- refcount_t refcnt;
- u64 prev;
- u64 start;
- u64 end;
- bool overwrite;
- u64 flush;
- char event_copy[PERF_SAMPLE_MAX_SIZE] __aligned(8);
+ void *base;
+ int mask;
+ int fd;
+ int cpu;
+ refcount_t refcnt;
+ u64 prev;
+ u64 start;
+ u64 end;
+ bool overwrite;
+ u64 flush;
+ libperf_unmap_cb_t unmap_cb;
+ char event_copy[PERF_SAMPLE_MAX_SIZE] __aligned(8);
};
struct perf_mmap_param {
@@ -36,10 +41,12 @@ struct perf_mmap_param {
size_t perf_mmap__mmap_len(struct perf_mmap *map);
-void perf_mmap__init(struct perf_mmap *map, bool overwrite);
+void perf_mmap__init(struct perf_mmap *map, bool overwrite,
+ libperf_unmap_cb_t unmap_cb);
int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
int fd, int cpu);
void perf_mmap__munmap(struct perf_mmap *map);
void perf_mmap__get(struct perf_mmap *map);
+void perf_mmap__put(struct perf_mmap *map);
#endif /* __LIBPERF_INTERNAL_MMAP_H */
diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
index 6eb228d89206..ea46f325fa98 100644
--- a/tools/perf/lib/mmap.c
+++ b/tools/perf/lib/mmap.c
@@ -3,10 +3,12 @@
#include <internal/mmap.h>
#include <internal/lib.h>
-void perf_mmap__init(struct perf_mmap *map, bool overwrite)
+void perf_mmap__init(struct perf_mmap *map, bool overwrite,
+ libperf_unmap_cb_t unmap_cb)
{
map->fd = -1;
map->overwrite = overwrite;
+ map->unmap_cb = unmap_cb;
refcount_set(&map->refcnt, 0);
}
@@ -40,9 +42,19 @@ void perf_mmap__munmap(struct perf_mmap *map)
map->fd = -1;
refcount_set(&map->refcnt, 0);
}
+ if (map && map->unmap_cb)
+ map->unmap_cb(map);
}
void perf_mmap__get(struct perf_mmap *map)
{
refcount_inc(&map->refcnt);
}
+
+void perf_mmap__put(struct perf_mmap *map)
+{
+ BUG_ON(map->base && refcount_read(&map->refcnt) == 0);
+
+ if (refcount_dec_and_test(&map->refcnt))
+ perf_mmap__munmap(map);
+}
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 2e5eaac6325e..bcfe0d1b6e63 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -409,7 +409,7 @@ static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd,
struct mmap *map = fda->priv[fd].ptr;
if (map)
- perf_mmap__put(map);
+ perf_mmap__put(&map->core);
}
int evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask)
@@ -577,11 +577,11 @@ static void evlist__munmap_nofree(struct evlist *evlist)
if (evlist->mmap)
for (i = 0; i < evlist->core.nr_mmaps; i++)
- mmap__munmap(&evlist->mmap[i]);
+ perf_mmap__munmap(&evlist->mmap[i].core);
if (evlist->overwrite_mmap)
for (i = 0; i < evlist->core.nr_mmaps; i++)
- mmap__munmap(&evlist->overwrite_mmap[i]);
+ perf_mmap__munmap(&evlist->overwrite_mmap[i].core);
}
void evlist__munmap(struct evlist *evlist)
@@ -591,6 +591,13 @@ void evlist__munmap(struct evlist *evlist)
zfree(&evlist->overwrite_mmap);
}
+static void perf_mmap__unmap_cb(struct perf_mmap *map)
+{
+ struct mmap *m = container_of(map, struct mmap, core);
+
+ mmap__munmap(m);
+}
+
static struct mmap *evlist__alloc_mmap(struct evlist *evlist,
bool overwrite)
{
@@ -614,7 +621,7 @@ static struct mmap *evlist__alloc_mmap(struct evlist *evlist,
* Each PERF_EVENT_IOC_SET_OUTPUT points to this mmap and
* thus does perf_mmap__get() on it.
*/
- perf_mmap__init(&map[i].core, overwrite);
+ perf_mmap__init(&map[i].core, overwrite, perf_mmap__unmap_cb);
}
return map;
@@ -691,7 +698,7 @@ static int evlist__mmap_per_evsel(struct evlist *evlist, int idx,
*/
if (!evsel->core.system_wide &&
perf_evlist__add_pollfd(&evlist->core, fd, &maps[idx], revent) < 0) {
- perf_mmap__put(&maps[idx]);
+ perf_mmap__put(&maps[idx].core);
return -1;
}
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index 2c73b5bcf74e..9f150d50cea5 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -110,14 +110,6 @@ static bool perf_mmap__empty(struct mmap *map)
return perf_mmap__read_head(map) == map->core.prev && !map->auxtrace_mmap.base;
}
-void perf_mmap__put(struct mmap *map)
-{
- BUG_ON(map->core.base && refcount_read(&map->core.refcnt) == 0);
-
- if (refcount_dec_and_test(&map->core.refcnt))
- mmap__munmap(map);
-}
-
void perf_mmap__consume(struct mmap *map)
{
if (!map->core.overwrite) {
@@ -127,7 +119,7 @@ void perf_mmap__consume(struct mmap *map)
}
if (refcount_read(&map->core.refcnt) == 1 && perf_mmap__empty(map))
- perf_mmap__put(map);
+ perf_mmap__put(&map->core);
}
int __weak auxtrace_mmap__mmap(struct auxtrace_mmap *mm __maybe_unused,
@@ -308,7 +300,6 @@ static void perf_mmap__aio_munmap(struct mmap *map __maybe_unused)
void mmap__munmap(struct mmap *map)
{
- perf_mmap__munmap(&map->core);
perf_mmap__aio_munmap(map);
if (map->data != NULL) {
munmap(map->data, mmap__mmap_len(map));
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index 6a18b2990059..78e3c4436ce8 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -45,8 +45,6 @@ struct mmap_params {
int mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu);
void mmap__munmap(struct mmap *map);
-void perf_mmap__put(struct mmap *map);
-
void perf_mmap__consume(struct mmap *map);
static inline u64 perf_mmap__read_head(struct mmap *mm)
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 08/36] perf tools: Use perf_mmap way to detect aux mmap
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (6 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 07/36] libperf: Add perf_mmap__put() function Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] " tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 09/36] libperf: Add perf_mmap__consume() function Jiri Olsa
` (27 subsequent siblings)
35 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: Alexander Shishkin, Michael Petlan, Namhyung Kim, Peter Zijlstra,
lkml, Ingo Molnar
We will move this code to libperf shortly, so we need to free it of
'struct auxtrace_mmap' usage, because it won't be available in libperf
(for now).
The perf_event_mmap_page::aux_size is set when the aux mmap is mapped,
so the check is equivalent.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lore.kernel.org/lkml/20190913132355.21634-48-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/mmap.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index 9f150d50cea5..f246dd403507 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -107,7 +107,9 @@ union perf_event *perf_mmap__read_event(struct mmap *map)
static bool perf_mmap__empty(struct mmap *map)
{
- return perf_mmap__read_head(map) == map->core.prev && !map->auxtrace_mmap.base;
+ struct perf_event_mmap_page *pc = map->core.base;
+
+ return perf_mmap__read_head(map) == map->core.prev && !pc->aux_size;
}
void perf_mmap__consume(struct mmap *map)
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 09/36] libperf: Add perf_mmap__consume() function
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (7 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 08/36] perf tools: Use perf_mmap way to detect aux mmap Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Adopt perf_mmap__consume() function from tools/perf tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 10/36] libperf: Add perf_mmap__read_init() function Jiri Olsa
` (26 subsequent siblings)
35 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: Alexander Shishkin, Michael Petlan, Namhyung Kim, Peter Zijlstra,
lkml, Ingo Molnar
Move perf_mmap__consume() vrom tools/perf to libperf and export it in
the perf/mmap.h header.
Move also the needed helpers perf_mmap__write_tail(),
perf_mmap__read_head() and perf_mmap__empty().
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lore.kernel.org/lkml/20190913132355.21634-49-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/arch/x86/tests/perf-time-to-tsc.c | 3 +-
tools/perf/builtin-kvm.c | 5 +--
tools/perf/builtin-top.c | 3 +-
tools/perf/builtin-trace.c | 3 +-
tools/perf/lib/Makefile | 5 +--
tools/perf/lib/include/internal/mmap.h | 2 ++
tools/perf/lib/include/perf/mmap.h | 11 +++++++
tools/perf/lib/libperf.map | 1 +
tools/perf/lib/mmap.c | 32 ++++++++++++++++++++
tools/perf/tests/backward-ring-buffer.c | 1 +
tools/perf/tests/bpf.c | 1 +
tools/perf/tests/code-reading.c | 3 +-
tools/perf/tests/keep-tracking.c | 3 +-
tools/perf/tests/mmap-basic.c | 3 +-
tools/perf/tests/openat-syscall-tp-fields.c | 3 +-
tools/perf/tests/perf-record.c | 3 +-
tools/perf/tests/sw-clock.c | 3 +-
tools/perf/tests/switch-tracking.c | 3 +-
tools/perf/tests/task-exit.c | 3 +-
tools/perf/util/evlist.c | 3 +-
tools/perf/util/mmap.c | 32 +++++---------------
tools/perf/util/mmap.h | 12 --------
tools/perf/util/python.c | 3 +-
23 files changed, 87 insertions(+), 54 deletions(-)
create mode 100644 tools/perf/lib/include/perf/mmap.h
diff --git a/tools/perf/arch/x86/tests/perf-time-to-tsc.c b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
index fa947952c16a..3397898824f6 100644
--- a/tools/perf/arch/x86/tests/perf-time-to-tsc.c
+++ b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
@@ -9,6 +9,7 @@
#include <sys/prctl.h>
#include <perf/cpumap.h>
#include <perf/evlist.h>
+#include <perf/mmap.h>
#include "debug.h"
#include "parse-events.h"
@@ -139,7 +140,7 @@ int test__perf_time_to_tsc(struct test *test __maybe_unused, int subtest __maybe
comm2_time = sample.time;
}
next_event:
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
}
perf_mmap__read_done(md);
}
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 58a9e0989491..0c04c4c6c1eb 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -46,6 +46,7 @@
#include <semaphore.h>
#include <signal.h>
#include <math.h>
+#include <perf/mmap.h>
static const char *get_filename_for_perf_kvm(void)
{
@@ -766,7 +767,7 @@ static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
while ((event = perf_mmap__read_event(md)) != NULL) {
err = perf_evlist__parse_sample_timestamp(evlist, event, ×tamp);
if (err) {
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
pr_err("Failed to parse sample\n");
return -1;
}
@@ -776,7 +777,7 @@ static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
* FIXME: Here we can't consume the event, as perf_session__queue_event will
* point to it, and it'll get possibly overwritten by the kernel.
*/
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
if (err) {
pr_err("Failed to enqueue sample: %d\n", err);
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 611d03030abc..5fcf15799415 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -82,6 +82,7 @@
#include <linux/err.h>
#include <linux/ctype.h>
+#include <perf/mmap.h>
static volatile int done;
static volatile int resize;
@@ -883,7 +884,7 @@ static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
if (ret)
break;
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
if (top->qe.rotate) {
pthread_mutex_lock(&top->qe.mutex);
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index bb5130d02155..ed1e14a84be0 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -77,6 +77,7 @@
#include <sys/sysmacros.h>
#include <linux/ctype.h>
+#include <perf/mmap.h>
#ifndef O_CLOEXEC
# define O_CLOEXEC 02000000
@@ -3460,7 +3461,7 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
if (err)
goto out_disable;
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
if (interrupted)
goto out_disable;
diff --git a/tools/perf/lib/Makefile b/tools/perf/lib/Makefile
index 85ccb8c439a4..0889c9c3ec19 100644
--- a/tools/perf/lib/Makefile
+++ b/tools/perf/lib/Makefile
@@ -172,8 +172,9 @@ install_headers:
$(call do_install,include/perf/cpumap.h,$(prefix)/include/perf,644); \
$(call do_install,include/perf/threadmap.h,$(prefix)/include/perf,644); \
$(call do_install,include/perf/evlist.h,$(prefix)/include/perf,644); \
- $(call do_install,include/perf/evsel.h,$(prefix)/include/perf,644);
- $(call do_install,include/perf/event.h,$(prefix)/include/perf,644);
+ $(call do_install,include/perf/evsel.h,$(prefix)/include/perf,644); \
+ $(call do_install,include/perf/event.h,$(prefix)/include/perf,644); \
+ $(call do_install,include/perf/mmap.h,$(prefix)/include/perf,644);
install_pkgconfig: $(LIBPERF_PC)
$(call QUIET_INSTALL, $(LIBPERF_PC)) \
diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
index bf9cc7d005ab..ee536c4441bb 100644
--- a/tools/perf/lib/include/internal/mmap.h
+++ b/tools/perf/lib/include/internal/mmap.h
@@ -49,4 +49,6 @@ void perf_mmap__munmap(struct perf_mmap *map);
void perf_mmap__get(struct perf_mmap *map);
void perf_mmap__put(struct perf_mmap *map);
+u64 perf_mmap__read_head(struct perf_mmap *map);
+
#endif /* __LIBPERF_INTERNAL_MMAP_H */
diff --git a/tools/perf/lib/include/perf/mmap.h b/tools/perf/lib/include/perf/mmap.h
new file mode 100644
index 000000000000..d3678d1834d9
--- /dev/null
+++ b/tools/perf/lib/include/perf/mmap.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LIBPERF_MMAP_H
+#define __LIBPERF_MMAP_H
+
+#include <perf/core.h>
+
+struct perf_mmap;
+
+LIBPERF_API void perf_mmap__consume(struct perf_mmap *map);
+
+#endif /* __LIBPERF_MMAP_H */
diff --git a/tools/perf/lib/libperf.map b/tools/perf/lib/libperf.map
index ab8dbde1136c..d7b327f224e2 100644
--- a/tools/perf/lib/libperf.map
+++ b/tools/perf/lib/libperf.map
@@ -40,6 +40,7 @@ LIBPERF_0.0.1 {
perf_evlist__next;
perf_evlist__set_maps;
perf_evlist__poll;
+ perf_mmap__consume;
local:
*;
};
diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
index ea46f325fa98..5b1859671fa8 100644
--- a/tools/perf/lib/mmap.c
+++ b/tools/perf/lib/mmap.c
@@ -1,5 +1,8 @@
// SPDX-License-Identifier: GPL-2.0
#include <sys/mman.h>
+#include <linux/ring_buffer.h>
+#include <linux/perf_event.h>
+#include <perf/mmap.h>
#include <internal/mmap.h>
#include <internal/lib.h>
@@ -58,3 +61,32 @@ void perf_mmap__put(struct perf_mmap *map)
if (refcount_dec_and_test(&map->refcnt))
perf_mmap__munmap(map);
}
+
+static inline void perf_mmap__write_tail(struct perf_mmap *md, u64 tail)
+{
+ ring_buffer_write_tail(md->base, tail);
+}
+
+u64 perf_mmap__read_head(struct perf_mmap *map)
+{
+ return ring_buffer_read_head(map->base);
+}
+
+static bool perf_mmap__empty(struct perf_mmap *map)
+{
+ struct perf_event_mmap_page *pc = map->base;
+
+ return perf_mmap__read_head(map) == map->prev && !pc->aux_size;
+}
+
+void perf_mmap__consume(struct perf_mmap *map)
+{
+ if (!map->overwrite) {
+ u64 old = map->prev;
+
+ perf_mmap__write_tail(map, old);
+ }
+
+ if (refcount_read(&map->refcnt) == 1 && perf_mmap__empty(map))
+ perf_mmap__put(map);
+}
diff --git a/tools/perf/tests/backward-ring-buffer.c b/tools/perf/tests/backward-ring-buffer.c
index 338cd9faa835..13f9a060361a 100644
--- a/tools/perf/tests/backward-ring-buffer.c
+++ b/tools/perf/tests/backward-ring-buffer.c
@@ -13,6 +13,7 @@
#include "util/mmap.h"
#include <errno.h>
#include <linux/string.h>
+#include <perf/mmap.h>
#define NR_ITERS 111
diff --git a/tools/perf/tests/bpf.c b/tools/perf/tests/bpf.c
index 1eb0bffaed6c..6f0d239f8277 100644
--- a/tools/perf/tests/bpf.c
+++ b/tools/perf/tests/bpf.c
@@ -15,6 +15,7 @@
#include <linux/string.h>
#include <api/fs/fs.h>
#include <bpf/bpf.h>
+#include <perf/mmap.h>
#include "tests.h"
#include "llvm.h"
#include "debug.h"
diff --git a/tools/perf/tests/code-reading.c b/tools/perf/tests/code-reading.c
index f5764a3890b9..b5a57bb54c25 100644
--- a/tools/perf/tests/code-reading.c
+++ b/tools/perf/tests/code-reading.c
@@ -10,6 +10,7 @@
#include <sys/param.h>
#include <perf/cpumap.h>
#include <perf/evlist.h>
+#include <perf/mmap.h>
#include "debug.h"
#include "dso.h"
@@ -430,7 +431,7 @@ static int process_events(struct machine *machine, struct evlist *evlist,
while ((event = perf_mmap__read_event(md)) != NULL) {
ret = process_event(machine, evlist, event, state);
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
if (ret < 0)
return ret;
}
diff --git a/tools/perf/tests/keep-tracking.c b/tools/perf/tests/keep-tracking.c
index 92c7d591bcac..31c005e07b17 100644
--- a/tools/perf/tests/keep-tracking.c
+++ b/tools/perf/tests/keep-tracking.c
@@ -5,6 +5,7 @@
#include <sys/prctl.h>
#include <perf/cpumap.h>
#include <perf/evlist.h>
+#include <perf/mmap.h>
#include "debug.h"
#include "parse-events.h"
@@ -46,7 +47,7 @@ static int find_comm(struct evlist *evlist, const char *comm)
(pid_t)event->comm.tid == getpid() &&
strcmp(event->comm.comm, comm) == 0)
found += 1;
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
}
perf_mmap__read_done(md);
}
diff --git a/tools/perf/tests/mmap-basic.c b/tools/perf/tests/mmap-basic.c
index 3a22dce991ba..b176acc4f52e 100644
--- a/tools/perf/tests/mmap-basic.c
+++ b/tools/perf/tests/mmap-basic.c
@@ -16,6 +16,7 @@
#include <linux/kernel.h>
#include <linux/string.h>
#include <perf/evlist.h>
+#include <perf/mmap.h>
/*
* This test will generate random numbers of calls to some getpid syscalls,
@@ -139,7 +140,7 @@ int test__basic_mmap(struct test *test __maybe_unused, int subtest __maybe_unuse
goto out_delete_evlist;
}
nr_events[evsel->idx]++;
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
}
perf_mmap__read_done(md);
diff --git a/tools/perf/tests/openat-syscall-tp-fields.c b/tools/perf/tests/openat-syscall-tp-fields.c
index 2b5c46813053..bbf8ba320721 100644
--- a/tools/perf/tests/openat-syscall-tp-fields.c
+++ b/tools/perf/tests/openat-syscall-tp-fields.c
@@ -13,6 +13,7 @@
#include "debug.h"
#include "util/mmap.h"
#include <errno.h>
+#include <perf/mmap.h>
#ifndef O_DIRECTORY
#define O_DIRECTORY 00200000
@@ -103,7 +104,7 @@ int test__syscall_openat_tp_fields(struct test *test __maybe_unused, int subtest
++nr_events;
if (type != PERF_RECORD_SAMPLE) {
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
continue;
}
diff --git a/tools/perf/tests/perf-record.c b/tools/perf/tests/perf-record.c
index 437426be29e9..6ebbcc65749e 100644
--- a/tools/perf/tests/perf-record.c
+++ b/tools/perf/tests/perf-record.c
@@ -6,6 +6,7 @@
#include <pthread.h>
#include <sched.h>
+#include <perf/mmap.h>
#include "evlist.h"
#include "evsel.h"
#include "debug.h"
@@ -276,7 +277,7 @@ int test__PERF_RECORD(struct test *test __maybe_unused, int subtest __maybe_unus
++errs;
}
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
}
perf_mmap__read_done(md);
}
diff --git a/tools/perf/tests/sw-clock.c b/tools/perf/tests/sw-clock.c
index 84519df87f30..1aeb558010c1 100644
--- a/tools/perf/tests/sw-clock.c
+++ b/tools/perf/tests/sw-clock.c
@@ -15,6 +15,7 @@
#include "util/mmap.h"
#include "util/thread_map.h"
#include <perf/evlist.h>
+#include <perf/mmap.h>
#define NR_LOOPS 10000000
@@ -117,7 +118,7 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id)
total_periods += sample.period;
nr_samples++;
next_event:
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
}
perf_mmap__read_done(md);
diff --git a/tools/perf/tests/switch-tracking.c b/tools/perf/tests/switch-tracking.c
index ffa592e0020e..55728b3da057 100644
--- a/tools/perf/tests/switch-tracking.c
+++ b/tools/perf/tests/switch-tracking.c
@@ -8,6 +8,7 @@
#include <linux/zalloc.h>
#include <perf/cpumap.h>
#include <perf/evlist.h>
+#include <perf/mmap.h>
#include "debug.h"
#include "parse-events.h"
@@ -275,7 +276,7 @@ static int process_events(struct evlist *evlist,
while ((event = perf_mmap__read_event(md)) != NULL) {
cnt += 1;
ret = add_event(evlist, &events, event);
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
if (ret < 0)
goto out_free_nodes;
}
diff --git a/tools/perf/tests/task-exit.c b/tools/perf/tests/task-exit.c
index bce3a4cb4c89..a0f689594848 100644
--- a/tools/perf/tests/task-exit.c
+++ b/tools/perf/tests/task-exit.c
@@ -12,6 +12,7 @@
#include <linux/string.h>
#include <perf/cpumap.h>
#include <perf/evlist.h>
+#include <perf/mmap.h>
static int exited;
static int nr_exit;
@@ -124,7 +125,7 @@ int test__task_exit(struct test *test __maybe_unused, int subtest __maybe_unused
if (event->header.type == PERF_RECORD_EXIT)
nr_exit++;
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
}
perf_mmap__read_done(md);
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index bcfe0d1b6e63..4b508d7e8e99 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -42,6 +42,7 @@
#include <perf/evlist.h>
#include <perf/evsel.h>
#include <perf/cpumap.h>
+#include <perf/mmap.h>
#include <internal/xyarray.h>
@@ -1749,7 +1750,7 @@ static void *perf_evlist__poll_thread(void *arg)
else
pr_warning("cannot locate proper evsel for the side band event\n");
- perf_mmap__consume(map);
+ perf_mmap__consume(&map->core);
got_data = true;
}
perf_mmap__read_done(map);
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index f246dd403507..abe7cbe6c95f 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -13,6 +13,7 @@
#include <stdlib.h>
#include <string.h>
#include <unistd.h> // sysconf()
+#include <perf/mmap.h>
#ifdef HAVE_LIBNUMA_SUPPORT
#include <numaif.h>
#endif
@@ -95,7 +96,7 @@ union perf_event *perf_mmap__read_event(struct mmap *map)
/* non-overwirte doesn't pause the ringbuffer */
if (!map->core.overwrite)
- map->core.end = perf_mmap__read_head(map);
+ map->core.end = perf_mmap__read_head(&map->core);
event = perf_mmap__read(map, &map->core.start, map->core.end);
@@ -105,25 +106,6 @@ union perf_event *perf_mmap__read_event(struct mmap *map)
return event;
}
-static bool perf_mmap__empty(struct mmap *map)
-{
- struct perf_event_mmap_page *pc = map->core.base;
-
- return perf_mmap__read_head(map) == map->core.prev && !pc->aux_size;
-}
-
-void perf_mmap__consume(struct mmap *map)
-{
- if (!map->core.overwrite) {
- u64 old = map->core.prev;
-
- perf_mmap__write_tail(map, old);
- }
-
- if (refcount_read(&map->core.refcnt) == 1 && perf_mmap__empty(map))
- perf_mmap__put(&map->core);
-}
-
int __weak auxtrace_mmap__mmap(struct auxtrace_mmap *mm __maybe_unused,
struct auxtrace_mmap_params *mp __maybe_unused,
void *userpg __maybe_unused,
@@ -420,7 +402,7 @@ static int overwrite_rb_find_range(void *buf, int mask, u64 *start, u64 *end)
*/
static int __perf_mmap__read_init(struct mmap *md)
{
- u64 head = perf_mmap__read_head(md);
+ u64 head = perf_mmap__read_head(&md->core);
u64 old = md->core.prev;
unsigned char *data = md->core.base + page_size;
unsigned long size;
@@ -437,7 +419,7 @@ static int __perf_mmap__read_init(struct mmap *md)
WARN_ONCE(1, "failed to keep up with mmap data. (warn only once)\n");
md->core.prev = head;
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
return -EAGAIN;
}
@@ -466,7 +448,7 @@ int perf_mmap__read_init(struct mmap *map)
int perf_mmap__push(struct mmap *md, void *to,
int push(struct mmap *map, void *to, void *buf, size_t size))
{
- u64 head = perf_mmap__read_head(md);
+ u64 head = perf_mmap__read_head(&md->core);
unsigned char *data = md->core.base + page_size;
unsigned long size;
void *buf;
@@ -499,7 +481,7 @@ int perf_mmap__push(struct mmap *md, void *to,
}
md->core.prev = head;
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
out:
return rc;
}
@@ -518,5 +500,5 @@ void perf_mmap__read_done(struct mmap *map)
if (!refcount_read(&map->core.refcnt))
return;
- map->core.prev = perf_mmap__read_head(map);
+ map->core.prev = perf_mmap__read_head(&map->core);
}
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index 78e3c4436ce8..89fb93267ff1 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -45,18 +45,6 @@ struct mmap_params {
int mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu);
void mmap__munmap(struct mmap *map);
-void perf_mmap__consume(struct mmap *map);
-
-static inline u64 perf_mmap__read_head(struct mmap *mm)
-{
- return ring_buffer_read_head(mm->core.base);
-}
-
-static inline void perf_mmap__write_tail(struct mmap *md, u64 tail)
-{
- ring_buffer_write_tail(md->core.base, tail);
-}
-
union perf_event *perf_mmap__read_forward(struct mmap *map);
union perf_event *perf_mmap__read_event(struct mmap *map);
diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index 53f31053a27a..3c1546cadbfe 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -6,6 +6,7 @@
#include <linux/err.h>
#include <perf/cpumap.h>
#include <traceevent/event-parse.h>
+#include <perf/mmap.h>
#include "evlist.h"
#include "callchain.h"
#include "evsel.h"
@@ -1039,7 +1040,7 @@ static PyObject *pyrf_evlist__read_on_cpu(struct pyrf_evlist *pevlist,
err = perf_evsel__parse_sample(evsel, event, &pevent->sample);
/* Consume the even only after we parsed it out. */
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
if (err)
return PyErr_Format(PyExc_OSError,
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 10/36] libperf: Add perf_mmap__read_init() function
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (8 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 09/36] libperf: Add perf_mmap__consume() function Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Adopt perf_mmap__read_init() from tools/perf tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 11/36] libperf: Add perf_mmap__read_done() function Jiri Olsa
` (25 subsequent siblings)
35 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: Alexander Shishkin, Michael Petlan, Namhyung Kim, Peter Zijlstra,
lkml, Ingo Molnar
Move perf_mmap__read_init() from tools/perf to libperf and export it in
perf/mmap.h header.
And add pr_debug2()/pr_debug3() macros support, because the code is
using them.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lore.kernel.org/lkml/20190913132355.21634-51-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/arch/x86/tests/perf-time-to-tsc.c | 2 +-
tools/perf/builtin-kvm.c | 2 +-
tools/perf/builtin-top.c | 2 +-
tools/perf/builtin-trace.c | 2 +-
tools/perf/lib/include/perf/core.h | 2 +
tools/perf/lib/include/perf/mmap.h | 1 +
tools/perf/lib/internal.h | 2 +
tools/perf/lib/libperf.map | 1 +
tools/perf/lib/mmap.c | 84 ++++++++++++++++++++
tools/perf/tests/backward-ring-buffer.c | 2 +-
tools/perf/tests/bpf.c | 2 +-
tools/perf/tests/code-reading.c | 2 +-
tools/perf/tests/keep-tracking.c | 2 +-
tools/perf/tests/mmap-basic.c | 2 +-
tools/perf/tests/openat-syscall-tp-fields.c | 2 +-
tools/perf/tests/perf-record.c | 2 +-
tools/perf/tests/sw-clock.c | 2 +-
tools/perf/tests/switch-tracking.c | 2 +-
tools/perf/tests/task-exit.c | 2 +-
tools/perf/util/evlist.c | 2 +-
tools/perf/util/mmap.c | 82 +------------------
tools/perf/util/mmap.h | 1 -
tools/perf/util/python.c | 2 +-
23 files changed, 107 insertions(+), 98 deletions(-)
diff --git a/tools/perf/arch/x86/tests/perf-time-to-tsc.c b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
index 3397898824f6..6a0c3ff78e01 100644
--- a/tools/perf/arch/x86/tests/perf-time-to-tsc.c
+++ b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
@@ -118,7 +118,7 @@ int test__perf_time_to_tsc(struct test *test __maybe_unused, int subtest __maybe
for (i = 0; i < evlist->core.nr_mmaps; i++) {
md = &evlist->mmap[i];
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
continue;
while ((event = perf_mmap__read_event(md)) != NULL) {
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 0c04c4c6c1eb..b6a8078dd446 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -760,7 +760,7 @@ static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
*mmap_time = ULLONG_MAX;
md = &evlist->mmap[idx];
- err = perf_mmap__read_init(md);
+ err = perf_mmap__read_init(&md->core);
if (err < 0)
return (err == -EAGAIN) ? 0 : -1;
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 5fcf15799415..4a4bb7b20c39 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -870,7 +870,7 @@ static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
union perf_event *event;
md = opts->overwrite ? &evlist->overwrite_mmap[idx] : &evlist->mmap[idx];
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
return;
while ((event = perf_mmap__read_event(md)) != NULL) {
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index ed1e14a84be0..49a0799ccf81 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -3451,7 +3451,7 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
struct mmap *md;
md = &evlist->mmap[i];
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
continue;
while ((event = perf_mmap__read_event(md)) != NULL) {
diff --git a/tools/perf/lib/include/perf/core.h b/tools/perf/lib/include/perf/core.h
index cfd70e720c1c..2a80e4b6f819 100644
--- a/tools/perf/lib/include/perf/core.h
+++ b/tools/perf/lib/include/perf/core.h
@@ -12,6 +12,8 @@ enum libperf_print_level {
LIBPERF_WARN,
LIBPERF_INFO,
LIBPERF_DEBUG,
+ LIBPERF_DEBUG2,
+ LIBPERF_DEBUG3,
};
typedef int (*libperf_print_fn_t)(enum libperf_print_level level,
diff --git a/tools/perf/lib/include/perf/mmap.h b/tools/perf/lib/include/perf/mmap.h
index d3678d1834d9..646e9052b003 100644
--- a/tools/perf/lib/include/perf/mmap.h
+++ b/tools/perf/lib/include/perf/mmap.h
@@ -7,5 +7,6 @@
struct perf_mmap;
LIBPERF_API void perf_mmap__consume(struct perf_mmap *map);
+LIBPERF_API int perf_mmap__read_init(struct perf_mmap *map);
#endif /* __LIBPERF_MMAP_H */
diff --git a/tools/perf/lib/internal.h b/tools/perf/lib/internal.h
index dc92f241732e..37db745e1502 100644
--- a/tools/perf/lib/internal.h
+++ b/tools/perf/lib/internal.h
@@ -14,5 +14,7 @@ do { \
#define pr_warning(fmt, ...) __pr(LIBPERF_WARN, fmt, ##__VA_ARGS__)
#define pr_info(fmt, ...) __pr(LIBPERF_INFO, fmt, ##__VA_ARGS__)
#define pr_debug(fmt, ...) __pr(LIBPERF_DEBUG, fmt, ##__VA_ARGS__)
+#define pr_debug2(fmt, ...) __pr(LIBPERF_DEBUG2, fmt, ##__VA_ARGS__)
+#define pr_debug3(fmt, ...) __pr(LIBPERF_DEBUG3, fmt, ##__VA_ARGS__)
#endif /* __LIBPERF_INTERNAL_H */
diff --git a/tools/perf/lib/libperf.map b/tools/perf/lib/libperf.map
index d7b327f224e2..bc3fbb213a3e 100644
--- a/tools/perf/lib/libperf.map
+++ b/tools/perf/lib/libperf.map
@@ -41,6 +41,7 @@ LIBPERF_0.0.1 {
perf_evlist__set_maps;
perf_evlist__poll;
perf_mmap__consume;
+ perf_mmap__read_init;
local:
*;
};
diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
index 5b1859671fa8..0e78c365ed90 100644
--- a/tools/perf/lib/mmap.c
+++ b/tools/perf/lib/mmap.c
@@ -1,10 +1,14 @@
// SPDX-License-Identifier: GPL-2.0
#include <sys/mman.h>
+#include <inttypes.h>
+#include <asm/bug.h>
+#include <errno.h>
#include <linux/ring_buffer.h>
#include <linux/perf_event.h>
#include <perf/mmap.h>
#include <internal/mmap.h>
#include <internal/lib.h>
+#include "internal.h"
void perf_mmap__init(struct perf_mmap *map, bool overwrite,
libperf_unmap_cb_t unmap_cb)
@@ -90,3 +94,83 @@ void perf_mmap__consume(struct perf_mmap *map)
if (refcount_read(&map->refcnt) == 1 && perf_mmap__empty(map))
perf_mmap__put(map);
}
+
+static int overwrite_rb_find_range(void *buf, int mask, u64 *start, u64 *end)
+{
+ struct perf_event_header *pheader;
+ u64 evt_head = *start;
+ int size = mask + 1;
+
+ pr_debug2("%s: buf=%p, start=%"PRIx64"\n", __func__, buf, *start);
+ pheader = (struct perf_event_header *)(buf + (*start & mask));
+ while (true) {
+ if (evt_head - *start >= (unsigned int)size) {
+ pr_debug("Finished reading overwrite ring buffer: rewind\n");
+ if (evt_head - *start > (unsigned int)size)
+ evt_head -= pheader->size;
+ *end = evt_head;
+ return 0;
+ }
+
+ pheader = (struct perf_event_header *)(buf + (evt_head & mask));
+
+ if (pheader->size == 0) {
+ pr_debug("Finished reading overwrite ring buffer: get start\n");
+ *end = evt_head;
+ return 0;
+ }
+
+ evt_head += pheader->size;
+ pr_debug3("move evt_head: %"PRIx64"\n", evt_head);
+ }
+ WARN_ONCE(1, "Shouldn't get here\n");
+ return -1;
+}
+
+/*
+ * Report the start and end of the available data in ringbuffer
+ */
+static int __perf_mmap__read_init(struct perf_mmap *md)
+{
+ u64 head = perf_mmap__read_head(md);
+ u64 old = md->prev;
+ unsigned char *data = md->base + page_size;
+ unsigned long size;
+
+ md->start = md->overwrite ? head : old;
+ md->end = md->overwrite ? old : head;
+
+ if ((md->end - md->start) < md->flush)
+ return -EAGAIN;
+
+ size = md->end - md->start;
+ if (size > (unsigned long)(md->mask) + 1) {
+ if (!md->overwrite) {
+ WARN_ONCE(1, "failed to keep up with mmap data. (warn only once)\n");
+
+ md->prev = head;
+ perf_mmap__consume(md);
+ return -EAGAIN;
+ }
+
+ /*
+ * Backward ring buffer is full. We still have a chance to read
+ * most of data from it.
+ */
+ if (overwrite_rb_find_range(data, md->mask, &md->start, &md->end))
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+int perf_mmap__read_init(struct perf_mmap *map)
+{
+ /*
+ * Check if event was unmapped due to a POLLHUP/POLLERR.
+ */
+ if (!refcount_read(&map->refcnt))
+ return -ENOENT;
+
+ return __perf_mmap__read_init(map);
+}
diff --git a/tools/perf/tests/backward-ring-buffer.c b/tools/perf/tests/backward-ring-buffer.c
index 13f9a060361a..ff3a986983ab 100644
--- a/tools/perf/tests/backward-ring-buffer.c
+++ b/tools/perf/tests/backward-ring-buffer.c
@@ -38,7 +38,7 @@ static int count_samples(struct evlist *evlist, int *sample_count,
struct mmap *map = &evlist->overwrite_mmap[i];
union perf_event *event;
- perf_mmap__read_init(map);
+ perf_mmap__read_init(&map->core);
while ((event = perf_mmap__read_event(map)) != NULL) {
const u32 type = event->header.type;
diff --git a/tools/perf/tests/bpf.c b/tools/perf/tests/bpf.c
index 6f0d239f8277..73d26c63d624 100644
--- a/tools/perf/tests/bpf.c
+++ b/tools/perf/tests/bpf.c
@@ -185,7 +185,7 @@ static int do_test(struct bpf_object *obj, int (*func)(void),
struct mmap *md;
md = &evlist->mmap[i];
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
continue;
while ((event = perf_mmap__read_event(md)) != NULL) {
diff --git a/tools/perf/tests/code-reading.c b/tools/perf/tests/code-reading.c
index b5a57bb54c25..cf992e0b27ff 100644
--- a/tools/perf/tests/code-reading.c
+++ b/tools/perf/tests/code-reading.c
@@ -426,7 +426,7 @@ static int process_events(struct machine *machine, struct evlist *evlist,
for (i = 0; i < evlist->core.nr_mmaps; i++) {
md = &evlist->mmap[i];
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
continue;
while ((event = perf_mmap__read_event(md)) != NULL) {
diff --git a/tools/perf/tests/keep-tracking.c b/tools/perf/tests/keep-tracking.c
index 31c005e07b17..e85da7e77269 100644
--- a/tools/perf/tests/keep-tracking.c
+++ b/tools/perf/tests/keep-tracking.c
@@ -39,7 +39,7 @@ static int find_comm(struct evlist *evlist, const char *comm)
found = 0;
for (i = 0; i < evlist->core.nr_mmaps; i++) {
md = &evlist->mmap[i];
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
continue;
while ((event = perf_mmap__read_event(md)) != NULL) {
if (event->header.type == PERF_RECORD_COMM &&
diff --git a/tools/perf/tests/mmap-basic.c b/tools/perf/tests/mmap-basic.c
index b176acc4f52e..77f42f0ac15d 100644
--- a/tools/perf/tests/mmap-basic.c
+++ b/tools/perf/tests/mmap-basic.c
@@ -114,7 +114,7 @@ int test__basic_mmap(struct test *test __maybe_unused, int subtest __maybe_unuse
}
md = &evlist->mmap[0];
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
goto out_init;
while ((event = perf_mmap__read_event(md)) != NULL) {
diff --git a/tools/perf/tests/openat-syscall-tp-fields.c b/tools/perf/tests/openat-syscall-tp-fields.c
index bbf8ba320721..d6a563120d93 100644
--- a/tools/perf/tests/openat-syscall-tp-fields.c
+++ b/tools/perf/tests/openat-syscall-tp-fields.c
@@ -93,7 +93,7 @@ int test__syscall_openat_tp_fields(struct test *test __maybe_unused, int subtest
struct mmap *md;
md = &evlist->mmap[i];
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
continue;
while ((event = perf_mmap__read_event(md)) != NULL) {
diff --git a/tools/perf/tests/perf-record.c b/tools/perf/tests/perf-record.c
index 6ebbcc65749e..2587cb8b2c0f 100644
--- a/tools/perf/tests/perf-record.c
+++ b/tools/perf/tests/perf-record.c
@@ -171,7 +171,7 @@ int test__PERF_RECORD(struct test *test __maybe_unused, int subtest __maybe_unus
struct mmap *md;
md = &evlist->mmap[i];
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
continue;
while ((event = perf_mmap__read_event(md)) != NULL) {
diff --git a/tools/perf/tests/sw-clock.c b/tools/perf/tests/sw-clock.c
index 1aeb558010c1..808669507c30 100644
--- a/tools/perf/tests/sw-clock.c
+++ b/tools/perf/tests/sw-clock.c
@@ -100,7 +100,7 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id)
evlist__disable(evlist);
md = &evlist->mmap[0];
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
goto out_init;
while ((event = perf_mmap__read_event(md)) != NULL) {
diff --git a/tools/perf/tests/switch-tracking.c b/tools/perf/tests/switch-tracking.c
index 55728b3da057..bedfdec34972 100644
--- a/tools/perf/tests/switch-tracking.c
+++ b/tools/perf/tests/switch-tracking.c
@@ -270,7 +270,7 @@ static int process_events(struct evlist *evlist,
for (i = 0; i < evlist->core.nr_mmaps; i++) {
md = &evlist->mmap[i];
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
continue;
while ((event = perf_mmap__read_event(md)) != NULL) {
diff --git a/tools/perf/tests/task-exit.c b/tools/perf/tests/task-exit.c
index a0f689594848..035d42375d4b 100644
--- a/tools/perf/tests/task-exit.c
+++ b/tools/perf/tests/task-exit.c
@@ -118,7 +118,7 @@ int test__task_exit(struct test *test __maybe_unused, int subtest __maybe_unused
retry:
md = &evlist->mmap[0];
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
goto out_init;
while ((event = perf_mmap__read_event(md)) != NULL) {
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 4b508d7e8e99..67fe34672224 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -1740,7 +1740,7 @@ static void *perf_evlist__poll_thread(void *arg)
struct mmap *map = &evlist->mmap[i];
union perf_event *event;
- if (perf_mmap__read_init(map))
+ if (perf_mmap__read_init(&map->core))
continue;
while ((event = perf_mmap__read_event(map)) != NULL) {
struct evsel *evsel = perf_evlist__event2evsel(evlist, event);
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index abe7cbe6c95f..59379118c2f1 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -365,86 +365,6 @@ int mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu)
return perf_mmap__aio_mmap(map, mp);
}
-static int overwrite_rb_find_range(void *buf, int mask, u64 *start, u64 *end)
-{
- struct perf_event_header *pheader;
- u64 evt_head = *start;
- int size = mask + 1;
-
- pr_debug2("%s: buf=%p, start=%"PRIx64"\n", __func__, buf, *start);
- pheader = (struct perf_event_header *)(buf + (*start & mask));
- while (true) {
- if (evt_head - *start >= (unsigned int)size) {
- pr_debug("Finished reading overwrite ring buffer: rewind\n");
- if (evt_head - *start > (unsigned int)size)
- evt_head -= pheader->size;
- *end = evt_head;
- return 0;
- }
-
- pheader = (struct perf_event_header *)(buf + (evt_head & mask));
-
- if (pheader->size == 0) {
- pr_debug("Finished reading overwrite ring buffer: get start\n");
- *end = evt_head;
- return 0;
- }
-
- evt_head += pheader->size;
- pr_debug3("move evt_head: %"PRIx64"\n", evt_head);
- }
- WARN_ONCE(1, "Shouldn't get here\n");
- return -1;
-}
-
-/*
- * Report the start and end of the available data in ringbuffer
- */
-static int __perf_mmap__read_init(struct mmap *md)
-{
- u64 head = perf_mmap__read_head(&md->core);
- u64 old = md->core.prev;
- unsigned char *data = md->core.base + page_size;
- unsigned long size;
-
- md->core.start = md->core.overwrite ? head : old;
- md->core.end = md->core.overwrite ? old : head;
-
- if ((md->core.end - md->core.start) < md->core.flush)
- return -EAGAIN;
-
- size = md->core.end - md->core.start;
- if (size > (unsigned long)(md->core.mask) + 1) {
- if (!md->core.overwrite) {
- WARN_ONCE(1, "failed to keep up with mmap data. (warn only once)\n");
-
- md->core.prev = head;
- perf_mmap__consume(&md->core);
- return -EAGAIN;
- }
-
- /*
- * Backward ring buffer is full. We still have a chance to read
- * most of data from it.
- */
- if (overwrite_rb_find_range(data, md->core.mask, &md->core.start, &md->core.end))
- return -EINVAL;
- }
-
- return 0;
-}
-
-int perf_mmap__read_init(struct mmap *map)
-{
- /*
- * Check if event was unmapped due to a POLLHUP/POLLERR.
- */
- if (!refcount_read(&map->core.refcnt))
- return -ENOENT;
-
- return __perf_mmap__read_init(map);
-}
-
int perf_mmap__push(struct mmap *md, void *to,
int push(struct mmap *map, void *to, void *buf, size_t size))
{
@@ -454,7 +374,7 @@ int perf_mmap__push(struct mmap *md, void *to,
void *buf;
int rc = 0;
- rc = perf_mmap__read_init(md);
+ rc = perf_mmap__read_init(&md->core);
if (rc < 0)
return (rc == -EAGAIN) ? 1 : -1;
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index 89fb93267ff1..6d818ef51f05 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -54,6 +54,5 @@ int perf_mmap__push(struct mmap *md, void *to,
size_t mmap__mmap_len(struct mmap *map);
-int perf_mmap__read_init(struct mmap *md);
void perf_mmap__read_done(struct mmap *map);
#endif /*__PERF_MMAP_H */
diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index 3c1546cadbfe..7cb432899e7a 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -1017,7 +1017,7 @@ static PyObject *pyrf_evlist__read_on_cpu(struct pyrf_evlist *pevlist,
if (!md)
return NULL;
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
goto end;
event = perf_mmap__read_event(md);
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 11/36] libperf: Add perf_mmap__read_done() function
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (9 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 10/36] libperf: Add perf_mmap__read_init() function Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Adopt perf_mmap__read_done() from tools/perf tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 12/36] libperf: Add perf_mmap__read_event() function Jiri Olsa
` (24 subsequent siblings)
35 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: Alexander Shishkin, Michael Petlan, Namhyung Kim, Peter Zijlstra,
lkml, Ingo Molnar
Move perf_mmap__read_init() from tools/perf to libperf and export it in
the perf/mmap.h header.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lore.kernel.org/lkml/20190913132355.21634-51-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/arch/x86/tests/perf-time-to-tsc.c | 2 +-
tools/perf/builtin-kvm.c | 2 +-
tools/perf/builtin-top.c | 2 +-
tools/perf/builtin-trace.c | 2 +-
tools/perf/lib/include/perf/mmap.h | 1 +
tools/perf/lib/libperf.map | 1 +
tools/perf/lib/mmap.c | 17 +++++++++++++++++
tools/perf/tests/backward-ring-buffer.c | 2 +-
tools/perf/tests/bpf.c | 2 +-
tools/perf/tests/code-reading.c | 2 +-
tools/perf/tests/keep-tracking.c | 2 +-
tools/perf/tests/mmap-basic.c | 2 +-
tools/perf/tests/openat-syscall-tp-fields.c | 2 +-
tools/perf/tests/perf-record.c | 2 +-
tools/perf/tests/sw-clock.c | 2 +-
tools/perf/tests/switch-tracking.c | 2 +-
tools/perf/tests/task-exit.c | 2 +-
tools/perf/util/evlist.c | 2 +-
tools/perf/util/mmap.c | 17 -----------------
tools/perf/util/mmap.h | 1 -
20 files changed, 34 insertions(+), 33 deletions(-)
diff --git a/tools/perf/arch/x86/tests/perf-time-to-tsc.c b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
index 6a0c3ff78e01..c90d925f7ae6 100644
--- a/tools/perf/arch/x86/tests/perf-time-to-tsc.c
+++ b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
@@ -142,7 +142,7 @@ int test__perf_time_to_tsc(struct test *test __maybe_unused, int subtest __maybe
next_event:
perf_mmap__consume(&md->core);
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
}
if (!comm1_time || !comm2_time)
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index b6a8078dd446..4c087a8c9fed 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -794,7 +794,7 @@ static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
break;
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
return n;
}
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 4a4bb7b20c39..1a54069ccd9c 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -894,7 +894,7 @@ static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
}
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
}
static void perf_top__mmap_read(struct perf_top *top)
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 49a0799ccf81..5fc3051a0938 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -3471,7 +3471,7 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
draining = true;
}
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
}
if (trace->nr_events == before) {
diff --git a/tools/perf/lib/include/perf/mmap.h b/tools/perf/lib/include/perf/mmap.h
index 646e9052b003..4f946e7f724b 100644
--- a/tools/perf/lib/include/perf/mmap.h
+++ b/tools/perf/lib/include/perf/mmap.h
@@ -8,5 +8,6 @@ struct perf_mmap;
LIBPERF_API void perf_mmap__consume(struct perf_mmap *map);
LIBPERF_API int perf_mmap__read_init(struct perf_mmap *map);
+LIBPERF_API void perf_mmap__read_done(struct perf_mmap *map);
#endif /* __LIBPERF_MMAP_H */
diff --git a/tools/perf/lib/libperf.map b/tools/perf/lib/libperf.map
index bc3fbb213a3e..7e3ea2e9c917 100644
--- a/tools/perf/lib/libperf.map
+++ b/tools/perf/lib/libperf.map
@@ -42,6 +42,7 @@ LIBPERF_0.0.1 {
perf_evlist__poll;
perf_mmap__consume;
perf_mmap__read_init;
+ perf_mmap__read_done;
local:
*;
};
diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
index 0e78c365ed90..7d39289a4a22 100644
--- a/tools/perf/lib/mmap.c
+++ b/tools/perf/lib/mmap.c
@@ -174,3 +174,20 @@ int perf_mmap__read_init(struct perf_mmap *map)
return __perf_mmap__read_init(map);
}
+
+/*
+ * Mandatory for overwrite mode
+ * The direction of overwrite mode is backward.
+ * The last perf_mmap__read() will set tail to map->core.prev.
+ * Need to correct the map->core.prev to head which is the end of next read.
+ */
+void perf_mmap__read_done(struct perf_mmap *map)
+{
+ /*
+ * Check if event was unmapped due to a POLLHUP/POLLERR.
+ */
+ if (!refcount_read(&map->refcnt))
+ return;
+
+ map->prev = perf_mmap__read_head(map);
+}
diff --git a/tools/perf/tests/backward-ring-buffer.c b/tools/perf/tests/backward-ring-buffer.c
index ff3a986983ab..13e67cd213bd 100644
--- a/tools/perf/tests/backward-ring-buffer.c
+++ b/tools/perf/tests/backward-ring-buffer.c
@@ -54,7 +54,7 @@ static int count_samples(struct evlist *evlist, int *sample_count,
return TEST_FAIL;
}
}
- perf_mmap__read_done(map);
+ perf_mmap__read_done(&map->core);
}
return TEST_OK;
}
diff --git a/tools/perf/tests/bpf.c b/tools/perf/tests/bpf.c
index 73d26c63d624..fd45529e29c1 100644
--- a/tools/perf/tests/bpf.c
+++ b/tools/perf/tests/bpf.c
@@ -194,7 +194,7 @@ static int do_test(struct bpf_object *obj, int (*func)(void),
if (type == PERF_RECORD_SAMPLE)
count ++;
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
}
if (count != expect) {
diff --git a/tools/perf/tests/code-reading.c b/tools/perf/tests/code-reading.c
index cf992e0b27ff..9947cda29bad 100644
--- a/tools/perf/tests/code-reading.c
+++ b/tools/perf/tests/code-reading.c
@@ -435,7 +435,7 @@ static int process_events(struct machine *machine, struct evlist *evlist,
if (ret < 0)
return ret;
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
}
return 0;
}
diff --git a/tools/perf/tests/keep-tracking.c b/tools/perf/tests/keep-tracking.c
index e85da7e77269..e950907f6f57 100644
--- a/tools/perf/tests/keep-tracking.c
+++ b/tools/perf/tests/keep-tracking.c
@@ -49,7 +49,7 @@ static int find_comm(struct evlist *evlist, const char *comm)
found += 1;
perf_mmap__consume(&md->core);
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
}
return found;
}
diff --git a/tools/perf/tests/mmap-basic.c b/tools/perf/tests/mmap-basic.c
index 77f42f0ac15d..bb15d405a42c 100644
--- a/tools/perf/tests/mmap-basic.c
+++ b/tools/perf/tests/mmap-basic.c
@@ -142,7 +142,7 @@ int test__basic_mmap(struct test *test __maybe_unused, int subtest __maybe_unuse
nr_events[evsel->idx]++;
perf_mmap__consume(&md->core);
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
out_init:
err = 0;
diff --git a/tools/perf/tests/openat-syscall-tp-fields.c b/tools/perf/tests/openat-syscall-tp-fields.c
index d6a563120d93..c95eb1bbf396 100644
--- a/tools/perf/tests/openat-syscall-tp-fields.c
+++ b/tools/perf/tests/openat-syscall-tp-fields.c
@@ -124,7 +124,7 @@ int test__syscall_openat_tp_fields(struct test *test __maybe_unused, int subtest
goto out_ok;
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
}
if (nr_events == before)
diff --git a/tools/perf/tests/perf-record.c b/tools/perf/tests/perf-record.c
index 2587cb8b2c0f..92a53be3b32b 100644
--- a/tools/perf/tests/perf-record.c
+++ b/tools/perf/tests/perf-record.c
@@ -279,7 +279,7 @@ int test__PERF_RECORD(struct test *test __maybe_unused, int subtest __maybe_unus
perf_mmap__consume(&md->core);
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
}
/*
diff --git a/tools/perf/tests/sw-clock.c b/tools/perf/tests/sw-clock.c
index 808669507c30..ace20921ad55 100644
--- a/tools/perf/tests/sw-clock.c
+++ b/tools/perf/tests/sw-clock.c
@@ -120,7 +120,7 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id)
next_event:
perf_mmap__consume(&md->core);
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
out_init:
if ((u64) nr_samples == total_periods) {
diff --git a/tools/perf/tests/switch-tracking.c b/tools/perf/tests/switch-tracking.c
index bedfdec34972..8400fb17c170 100644
--- a/tools/perf/tests/switch-tracking.c
+++ b/tools/perf/tests/switch-tracking.c
@@ -280,7 +280,7 @@ static int process_events(struct evlist *evlist,
if (ret < 0)
goto out_free_nodes;
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
}
events_array = calloc(cnt, sizeof(struct event_node));
diff --git a/tools/perf/tests/task-exit.c b/tools/perf/tests/task-exit.c
index 035d42375d4b..c6a13948821c 100644
--- a/tools/perf/tests/task-exit.c
+++ b/tools/perf/tests/task-exit.c
@@ -127,7 +127,7 @@ int test__task_exit(struct test *test __maybe_unused, int subtest __maybe_unused
perf_mmap__consume(&md->core);
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
out_init:
if (!exited || !nr_exit) {
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 67fe34672224..830dc91994bc 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -1753,7 +1753,7 @@ static void *perf_evlist__poll_thread(void *arg)
perf_mmap__consume(&map->core);
got_data = true;
}
- perf_mmap__read_done(map);
+ perf_mmap__read_done(&map->core);
}
if (draining && !got_data)
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index 59379118c2f1..2dedef9b06fd 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -405,20 +405,3 @@ int perf_mmap__push(struct mmap *md, void *to,
out:
return rc;
}
-
-/*
- * Mandatory for overwrite mode
- * The direction of overwrite mode is backward.
- * The last perf_mmap__read() will set tail to map->core.prev.
- * Need to correct the map->core.prev to head which is the end of next read.
- */
-void perf_mmap__read_done(struct mmap *map)
-{
- /*
- * Check if event was unmapped due to a POLLHUP/POLLERR.
- */
- if (!refcount_read(&map->core.refcnt))
- return;
-
- map->core.prev = perf_mmap__read_head(&map->core);
-}
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index 6d818ef51f05..0b15702be1a5 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -54,5 +54,4 @@ int perf_mmap__push(struct mmap *md, void *to,
size_t mmap__mmap_len(struct mmap *map);
-void perf_mmap__read_done(struct mmap *map);
#endif /*__PERF_MMAP_H */
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 12/36] libperf: Add perf_mmap__read_event() function
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (10 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 11/36] libperf: Add perf_mmap__read_done() function Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-10 14:47 ` Arnaldo Carvalho de Melo
2019-10-15 5:31 ` [tip: perf/core] libperf: Adopt perf_mmap__read_event() from tools/perf tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 13/36] libperf: Add perf_evlist__mmap()/munmap() functions Jiri Olsa
` (23 subsequent siblings)
35 siblings, 2 replies; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: Alexander Shishkin, Michael Petlan, Namhyung Kim, Peter Zijlstra,
lkml, Ingo Molnar
Move perf_mmap__read_event() from tools/perf to libperf and export it in
the perf/mmap.h header.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lore.kernel.org/lkml/20190913132355.21634-52-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/arch/x86/tests/perf-time-to-tsc.c | 2 +-
tools/perf/builtin-kvm.c | 2 +-
tools/perf/builtin-top.c | 2 +-
tools/perf/builtin-trace.c | 2 +-
tools/perf/lib/include/internal/mmap.h | 1 +
tools/perf/lib/include/perf/mmap.h | 1 +
tools/perf/lib/libperf.map | 1 +
tools/perf/lib/mmap.c | 79 ++++++++++++++++++++
tools/perf/tests/backward-ring-buffer.c | 2 +-
tools/perf/tests/bpf.c | 2 +-
tools/perf/tests/code-reading.c | 2 +-
tools/perf/tests/keep-tracking.c | 2 +-
tools/perf/tests/mmap-basic.c | 2 +-
tools/perf/tests/openat-syscall-tp-fields.c | 2 +-
tools/perf/tests/perf-record.c | 2 +-
tools/perf/tests/sw-clock.c | 2 +-
tools/perf/tests/switch-tracking.c | 2 +-
tools/perf/tests/task-exit.c | 2 +-
tools/perf/util/evlist.c | 2 +-
tools/perf/util/mmap.c | 77 -------------------
tools/perf/util/mmap.h | 2 -
tools/perf/util/python.c | 2 +-
22 files changed, 98 insertions(+), 95 deletions(-)
diff --git a/tools/perf/arch/x86/tests/perf-time-to-tsc.c b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
index c90d925f7ae6..909ead08a6f6 100644
--- a/tools/perf/arch/x86/tests/perf-time-to-tsc.c
+++ b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
@@ -121,7 +121,7 @@ int test__perf_time_to_tsc(struct test *test __maybe_unused, int subtest __maybe
if (perf_mmap__read_init(&md->core) < 0)
continue;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
struct perf_sample sample;
if (event->header.type != PERF_RECORD_COMM ||
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 4c087a8c9fed..858da896b518 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -764,7 +764,7 @@ static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
if (err < 0)
return (err == -EAGAIN) ? 0 : -1;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
err = perf_evlist__parse_sample_timestamp(evlist, event, ×tamp);
if (err) {
perf_mmap__consume(&md->core);
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 1a54069ccd9c..d96f24c8770d 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -873,7 +873,7 @@ static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
if (perf_mmap__read_init(&md->core) < 0)
return;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
int ret;
ret = perf_evlist__parse_sample_timestamp(evlist, event, &last_timestamp);
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 5fc3051a0938..2ae8298375a0 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -3454,7 +3454,7 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
if (perf_mmap__read_init(&md->core) < 0)
continue;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
++trace->nr_events;
err = trace__deliver_event(trace, event);
diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
index ee536c4441bb..b328332b6ccf 100644
--- a/tools/perf/lib/include/internal/mmap.h
+++ b/tools/perf/lib/include/internal/mmap.h
@@ -11,6 +11,7 @@
#define PERF_SAMPLE_MAX_SIZE (1 << 16)
struct perf_mmap;
+union perf_event;
typedef void (*libperf_unmap_cb_t)(struct perf_mmap *map);
diff --git a/tools/perf/lib/include/perf/mmap.h b/tools/perf/lib/include/perf/mmap.h
index 4f946e7f724b..396c6543d95d 100644
--- a/tools/perf/lib/include/perf/mmap.h
+++ b/tools/perf/lib/include/perf/mmap.h
@@ -9,5 +9,6 @@ struct perf_mmap;
LIBPERF_API void perf_mmap__consume(struct perf_mmap *map);
LIBPERF_API int perf_mmap__read_init(struct perf_mmap *map);
LIBPERF_API void perf_mmap__read_done(struct perf_mmap *map);
+LIBPERF_API union perf_event *perf_mmap__read_event(struct perf_mmap *map);
#endif /* __LIBPERF_MMAP_H */
diff --git a/tools/perf/lib/libperf.map b/tools/perf/lib/libperf.map
index 7e3ea2e9c917..8bb0d73e0c6c 100644
--- a/tools/perf/lib/libperf.map
+++ b/tools/perf/lib/libperf.map
@@ -43,6 +43,7 @@ LIBPERF_0.0.1 {
perf_mmap__consume;
perf_mmap__read_init;
perf_mmap__read_done;
+ perf_mmap__read_event;
local:
*;
};
diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
index 7d39289a4a22..fe9e1b095fd7 100644
--- a/tools/perf/lib/mmap.c
+++ b/tools/perf/lib/mmap.c
@@ -3,9 +3,11 @@
#include <inttypes.h>
#include <asm/bug.h>
#include <errno.h>
+#include <string.h>
#include <linux/ring_buffer.h>
#include <linux/perf_event.h>
#include <perf/mmap.h>
+#include <perf/event.h>
#include <internal/mmap.h>
#include <internal/lib.h>
#include "internal.h"
@@ -191,3 +193,80 @@ void perf_mmap__read_done(struct perf_mmap *map)
map->prev = perf_mmap__read_head(map);
}
+
+/* When check_messup is true, 'end' must points to a good entry */
+static union perf_event *perf_mmap__read(struct perf_mmap *map,
+ u64 *startp, u64 end)
+{
+ unsigned char *data = map->base + page_size;
+ union perf_event *event = NULL;
+ int diff = end - *startp;
+
+ if (diff >= (int)sizeof(event->header)) {
+ size_t size;
+
+ event = (union perf_event *)&data[*startp & map->mask];
+ size = event->header.size;
+
+ if (size < sizeof(event->header) || diff < (int)size)
+ return NULL;
+
+ /*
+ * Event straddles the mmap boundary -- header should always
+ * be inside due to u64 alignment of output.
+ */
+ if ((*startp & map->mask) + size != ((*startp + size) & map->mask)) {
+ unsigned int offset = *startp;
+ unsigned int len = min(sizeof(*event), size), cpy;
+ void *dst = map->event_copy;
+
+ do {
+ cpy = min(map->mask + 1 - (offset & map->mask), len);
+ memcpy(dst, &data[offset & map->mask], cpy);
+ offset += cpy;
+ dst += cpy;
+ len -= cpy;
+ } while (len);
+
+ event = (union perf_event *)map->event_copy;
+ }
+
+ *startp += size;
+ }
+
+ return event;
+}
+
+/*
+ * Read event from ring buffer one by one.
+ * Return one event for each call.
+ *
+ * Usage:
+ * perf_mmap__read_init()
+ * while(event = perf_mmap__read_event()) {
+ * //process the event
+ * perf_mmap__consume()
+ * }
+ * perf_mmap__read_done()
+ */
+union perf_event *perf_mmap__read_event(struct perf_mmap *map)
+{
+ union perf_event *event;
+
+ /*
+ * Check if event was unmapped due to a POLLHUP/POLLERR.
+ */
+ if (!refcount_read(&map->refcnt))
+ return NULL;
+
+ /* non-overwirte doesn't pause the ringbuffer */
+ if (!map->overwrite)
+ map->end = perf_mmap__read_head(map);
+
+ event = perf_mmap__read(map, &map->start, map->end);
+
+ if (!map->overwrite)
+ map->prev = map->start;
+
+ return event;
+}
diff --git a/tools/perf/tests/backward-ring-buffer.c b/tools/perf/tests/backward-ring-buffer.c
index 13e67cd213bd..a4cd30c0beb3 100644
--- a/tools/perf/tests/backward-ring-buffer.c
+++ b/tools/perf/tests/backward-ring-buffer.c
@@ -39,7 +39,7 @@ static int count_samples(struct evlist *evlist, int *sample_count,
union perf_event *event;
perf_mmap__read_init(&map->core);
- while ((event = perf_mmap__read_event(map)) != NULL) {
+ while ((event = perf_mmap__read_event(&map->core)) != NULL) {
const u32 type = event->header.type;
switch (type) {
diff --git a/tools/perf/tests/bpf.c b/tools/perf/tests/bpf.c
index fd45529e29c1..5d20bf8397f0 100644
--- a/tools/perf/tests/bpf.c
+++ b/tools/perf/tests/bpf.c
@@ -188,7 +188,7 @@ static int do_test(struct bpf_object *obj, int (*func)(void),
if (perf_mmap__read_init(&md->core) < 0)
continue;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
const u32 type = event->header.type;
if (type == PERF_RECORD_SAMPLE)
diff --git a/tools/perf/tests/code-reading.c b/tools/perf/tests/code-reading.c
index 9947cda29bad..1f017e1b2a55 100644
--- a/tools/perf/tests/code-reading.c
+++ b/tools/perf/tests/code-reading.c
@@ -429,7 +429,7 @@ static int process_events(struct machine *machine, struct evlist *evlist,
if (perf_mmap__read_init(&md->core) < 0)
continue;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
ret = process_event(machine, evlist, event, state);
perf_mmap__consume(&md->core);
if (ret < 0)
diff --git a/tools/perf/tests/keep-tracking.c b/tools/perf/tests/keep-tracking.c
index e950907f6f57..50a0c9fcde7d 100644
--- a/tools/perf/tests/keep-tracking.c
+++ b/tools/perf/tests/keep-tracking.c
@@ -41,7 +41,7 @@ static int find_comm(struct evlist *evlist, const char *comm)
md = &evlist->mmap[i];
if (perf_mmap__read_init(&md->core) < 0)
continue;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
if (event->header.type == PERF_RECORD_COMM &&
(pid_t)event->comm.pid == getpid() &&
(pid_t)event->comm.tid == getpid() &&
diff --git a/tools/perf/tests/mmap-basic.c b/tools/perf/tests/mmap-basic.c
index bb15d405a42c..5f4c0dbb4715 100644
--- a/tools/perf/tests/mmap-basic.c
+++ b/tools/perf/tests/mmap-basic.c
@@ -117,7 +117,7 @@ int test__basic_mmap(struct test *test __maybe_unused, int subtest __maybe_unuse
if (perf_mmap__read_init(&md->core) < 0)
goto out_init;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
struct perf_sample sample;
if (event->header.type != PERF_RECORD_SAMPLE) {
diff --git a/tools/perf/tests/openat-syscall-tp-fields.c b/tools/perf/tests/openat-syscall-tp-fields.c
index c95eb1bbf396..c6b2d7aab608 100644
--- a/tools/perf/tests/openat-syscall-tp-fields.c
+++ b/tools/perf/tests/openat-syscall-tp-fields.c
@@ -96,7 +96,7 @@ int test__syscall_openat_tp_fields(struct test *test __maybe_unused, int subtest
if (perf_mmap__read_init(&md->core) < 0)
continue;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
const u32 type = event->header.type;
int tp_flags;
struct perf_sample sample;
diff --git a/tools/perf/tests/perf-record.c b/tools/perf/tests/perf-record.c
index 92a53be3b32b..2195fc205e72 100644
--- a/tools/perf/tests/perf-record.c
+++ b/tools/perf/tests/perf-record.c
@@ -174,7 +174,7 @@ int test__PERF_RECORD(struct test *test __maybe_unused, int subtest __maybe_unus
if (perf_mmap__read_init(&md->core) < 0)
continue;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
const u32 type = event->header.type;
const char *name = perf_event__name(type);
diff --git a/tools/perf/tests/sw-clock.c b/tools/perf/tests/sw-clock.c
index ace20921ad55..bfb9986093d8 100644
--- a/tools/perf/tests/sw-clock.c
+++ b/tools/perf/tests/sw-clock.c
@@ -103,7 +103,7 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id)
if (perf_mmap__read_init(&md->core) < 0)
goto out_init;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
struct perf_sample sample;
if (event->header.type != PERF_RECORD_SAMPLE)
diff --git a/tools/perf/tests/switch-tracking.c b/tools/perf/tests/switch-tracking.c
index 8400fb17c170..fcb0d03dba4e 100644
--- a/tools/perf/tests/switch-tracking.c
+++ b/tools/perf/tests/switch-tracking.c
@@ -273,7 +273,7 @@ static int process_events(struct evlist *evlist,
if (perf_mmap__read_init(&md->core) < 0)
continue;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
cnt += 1;
ret = add_event(evlist, &events, event);
perf_mmap__consume(&md->core);
diff --git a/tools/perf/tests/task-exit.c b/tools/perf/tests/task-exit.c
index c6a13948821c..4965f8b9055b 100644
--- a/tools/perf/tests/task-exit.c
+++ b/tools/perf/tests/task-exit.c
@@ -121,7 +121,7 @@ int test__task_exit(struct test *test __maybe_unused, int subtest __maybe_unused
if (perf_mmap__read_init(&md->core) < 0)
goto out_init;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
if (event->header.type == PERF_RECORD_EXIT)
nr_exit++;
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 830dc91994bc..09fe8fe9805d 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -1742,7 +1742,7 @@ static void *perf_evlist__poll_thread(void *arg)
if (perf_mmap__read_init(&map->core))
continue;
- while ((event = perf_mmap__read_event(map)) != NULL) {
+ while ((event = perf_mmap__read_event(&map->core)) != NULL) {
struct evsel *evsel = perf_evlist__event2evsel(evlist, event);
if (evsel && evsel->side_band.cb)
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index 2dedef9b06fd..2a8bf0ab861c 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -29,83 +29,6 @@ size_t mmap__mmap_len(struct mmap *map)
return perf_mmap__mmap_len(&map->core);
}
-/* When check_messup is true, 'end' must points to a good entry */
-static union perf_event *perf_mmap__read(struct mmap *map,
- u64 *startp, u64 end)
-{
- unsigned char *data = map->core.base + page_size;
- union perf_event *event = NULL;
- int diff = end - *startp;
-
- if (diff >= (int)sizeof(event->header)) {
- size_t size;
-
- event = (union perf_event *)&data[*startp & map->core.mask];
- size = event->header.size;
-
- if (size < sizeof(event->header) || diff < (int)size)
- return NULL;
-
- /*
- * Event straddles the mmap boundary -- header should always
- * be inside due to u64 alignment of output.
- */
- if ((*startp & map->core.mask) + size != ((*startp + size) & map->core.mask)) {
- unsigned int offset = *startp;
- unsigned int len = min(sizeof(*event), size), cpy;
- void *dst = map->core.event_copy;
-
- do {
- cpy = min(map->core.mask + 1 - (offset & map->core.mask), len);
- memcpy(dst, &data[offset & map->core.mask], cpy);
- offset += cpy;
- dst += cpy;
- len -= cpy;
- } while (len);
-
- event = (union perf_event *)map->core.event_copy;
- }
-
- *startp += size;
- }
-
- return event;
-}
-
-/*
- * Read event from ring buffer one by one.
- * Return one event for each call.
- *
- * Usage:
- * perf_mmap__read_init()
- * while(event = perf_mmap__read_event()) {
- * //process the event
- * perf_mmap__consume()
- * }
- * perf_mmap__read_done()
- */
-union perf_event *perf_mmap__read_event(struct mmap *map)
-{
- union perf_event *event;
-
- /*
- * Check if event was unmapped due to a POLLHUP/POLLERR.
- */
- if (!refcount_read(&map->core.refcnt))
- return NULL;
-
- /* non-overwirte doesn't pause the ringbuffer */
- if (!map->core.overwrite)
- map->core.end = perf_mmap__read_head(&map->core);
-
- event = perf_mmap__read(map, &map->core.start, map->core.end);
-
- if (!map->core.overwrite)
- map->core.prev = map->core.start;
-
- return event;
-}
-
int __weak auxtrace_mmap__mmap(struct auxtrace_mmap *mm __maybe_unused,
struct auxtrace_mmap_params *mp __maybe_unused,
void *userpg __maybe_unused,
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index 0b15702be1a5..bee4e83f7109 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -47,8 +47,6 @@ void mmap__munmap(struct mmap *map);
union perf_event *perf_mmap__read_forward(struct mmap *map);
-union perf_event *perf_mmap__read_event(struct mmap *map);
-
int perf_mmap__push(struct mmap *md, void *to,
int push(struct mmap *map, void *to, void *buf, size_t size));
diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index 7cb432899e7a..78345442cad9 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -1020,7 +1020,7 @@ static PyObject *pyrf_evlist__read_on_cpu(struct pyrf_evlist *pevlist,
if (perf_mmap__read_init(&md->core) < 0)
goto end;
- event = perf_mmap__read_event(md);
+ event = perf_mmap__read_event(&md->core);
if (event != NULL) {
PyObject *pyevent = pyrf_event__new(event);
struct pyrf_event *pevent = (struct pyrf_event *)pyevent;
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 13/36] libperf: Add perf_evlist__mmap()/munmap() functions
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (11 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 12/36] libperf: Add perf_mmap__read_event() function Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Adopt perf_evlist__mmap()/munmap() from tools/perf tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 14/36] libperf: Add perf_evlist__mmap_ops function Jiri Olsa
` (22 subsequent siblings)
35 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: Alexander Shishkin, Michael Petlan, Namhyung Kim, Peter Zijlstra,
lkml, Ingo Molnar
Add libperf's version of perf_evlist__mmap()/munmap() functions and
exporting them in the perf/evlist.h header.
It's the backbone of what we have in perf code. The following changes
will add needed callbacks and then we'll finally switch the perf code to
use libperf's version.
Add mmap/mmap_ovw 'struct perf_mmap' object arrays to hold maps for
libperf's evlist.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lore.kernel.org/lkml/20190913132355.21634-53-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/lib/evlist.c | 236 +++++++++++++++++++++++
tools/perf/lib/include/internal/evlist.h | 2 +
tools/perf/lib/include/perf/evlist.h | 3 +
tools/perf/lib/libperf.map | 2 +
4 files changed, 243 insertions(+)
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index d1496fee810c..250ad5752589 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -8,13 +8,20 @@
#include <internal/evlist.h>
#include <internal/evsel.h>
#include <internal/xyarray.h>
+#include <internal/mmap.h>
+#include <internal/cpumap.h>
+#include <internal/threadmap.h>
+#include <internal/xyarray.h>
+#include <internal/lib.h>
#include <linux/zalloc.h>
+#include <sys/ioctl.h>
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <poll.h>
+#include <sys/mman.h>
#include <perf/cpumap.h>
#include <perf/threadmap.h>
#include <api/fd/array.h>
@@ -103,6 +110,10 @@ perf_evlist__next(struct perf_evlist *evlist, struct perf_evsel *prev)
void perf_evlist__delete(struct perf_evlist *evlist)
{
+ if (evlist == NULL)
+ return;
+
+ perf_evlist__munmap(evlist);
free(evlist);
}
@@ -281,3 +292,228 @@ int perf_evlist__poll(struct perf_evlist *evlist, int timeout)
{
return fdarray__poll(&evlist->pollfd, timeout);
}
+
+static struct perf_mmap* perf_evlist__alloc_mmap(struct perf_evlist *evlist, bool overwrite)
+{
+ int i;
+ struct perf_mmap *map;
+
+ evlist->nr_mmaps = perf_cpu_map__nr(evlist->cpus);
+ if (perf_cpu_map__empty(evlist->cpus))
+ evlist->nr_mmaps = perf_thread_map__nr(evlist->threads);
+
+ map = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap));
+ if (!map)
+ return NULL;
+
+ for (i = 0; i < evlist->nr_mmaps; i++) {
+ /*
+ * When the perf_mmap() call is made we grab one refcount, plus
+ * one extra to let perf_mmap__consume() get the last
+ * events after all real references (perf_mmap__get()) are
+ * dropped.
+ *
+ * Each PERF_EVENT_IOC_SET_OUTPUT points to this mmap and
+ * thus does perf_mmap__get() on it.
+ */
+ perf_mmap__init(&map[i], overwrite, NULL);
+ }
+
+ return map;
+}
+
+static void perf_evlist__set_sid_idx(struct perf_evlist *evlist,
+ struct perf_evsel *evsel, int idx, int cpu,
+ int thread)
+{
+ struct perf_sample_id *sid = SID(evsel, cpu, thread);
+
+ sid->idx = idx;
+ if (evlist->cpus && cpu >= 0)
+ sid->cpu = evlist->cpus->map[cpu];
+ else
+ sid->cpu = -1;
+ if (!evsel->system_wide && evlist->threads && thread >= 0)
+ sid->tid = perf_thread_map__pid(evlist->threads, thread);
+ else
+ sid->tid = -1;
+}
+
+static struct perf_mmap*
+perf_evlist__map_get(struct perf_evlist *evlist, bool overwrite, int idx)
+{
+ struct perf_mmap *map = &evlist->mmap[idx];
+
+ if (overwrite) {
+ if (!evlist->mmap_ovw) {
+ evlist->mmap_ovw = perf_evlist__alloc_mmap(evlist, true);
+ if (!evlist->mmap_ovw)
+ return NULL;
+ }
+ map = &evlist->mmap_ovw[idx];
+ }
+
+ return map;
+}
+
+#define FD(e, x, y) (*(int *) xyarray__entry(e->fd, x, y))
+
+static int
+mmap_per_evsel(struct perf_evlist *evlist, int idx,
+ struct perf_mmap_param *mp, int cpu_idx,
+ int thread, int *_output, int *_output_overwrite)
+{
+ int evlist_cpu = perf_cpu_map__cpu(evlist->cpus, cpu_idx);
+ struct perf_evsel *evsel;
+ int revent;
+
+ perf_evlist__for_each_entry(evlist, evsel) {
+ bool overwrite = evsel->attr.write_backward;
+ struct perf_mmap *map;
+ int *output, fd, cpu;
+
+ if (evsel->system_wide && thread)
+ continue;
+
+ cpu = perf_cpu_map__idx(evsel->cpus, evlist_cpu);
+ if (cpu == -1)
+ continue;
+
+ map = perf_evlist__map_get(evlist, overwrite, idx);
+ if (map == NULL)
+ return -ENOMEM;
+
+ if (overwrite) {
+ mp->prot = PROT_READ;
+ output = _output_overwrite;
+ } else {
+ mp->prot = PROT_READ | PROT_WRITE;
+ output = _output;
+ }
+
+ fd = FD(evsel, cpu, thread);
+
+ if (*output == -1) {
+ *output = fd;
+
+ if (perf_mmap__mmap(map, mp, *output, evlist_cpu) < 0)
+ return -1;
+ } else {
+ if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0)
+ return -1;
+
+ perf_mmap__get(map);
+ }
+
+ revent = !overwrite ? POLLIN : 0;
+
+ if (!evsel->system_wide &&
+ perf_evlist__add_pollfd(evlist, fd, map, revent) < 0) {
+ perf_mmap__put(map);
+ return -1;
+ }
+
+ if (evsel->attr.read_format & PERF_FORMAT_ID) {
+ if (perf_evlist__id_add_fd(evlist, evsel, cpu, thread,
+ fd) < 0)
+ return -1;
+ perf_evlist__set_sid_idx(evlist, evsel, idx, cpu,
+ thread);
+ }
+ }
+
+ return 0;
+}
+
+static int
+mmap_per_thread(struct perf_evlist *evlist, struct perf_mmap_param *mp)
+{
+ int thread;
+ int nr_threads = perf_thread_map__nr(evlist->threads);
+
+ for (thread = 0; thread < nr_threads; thread++) {
+ int output = -1;
+ int output_overwrite = -1;
+
+ if (mmap_per_evsel(evlist, thread, mp, 0, thread,
+ &output, &output_overwrite))
+ goto out_unmap;
+ }
+
+ return 0;
+
+out_unmap:
+ perf_evlist__munmap(evlist);
+ return -1;
+}
+
+static int
+mmap_per_cpu(struct perf_evlist *evlist, struct perf_mmap_param *mp)
+{
+ int nr_threads = perf_thread_map__nr(evlist->threads);
+ int nr_cpus = perf_cpu_map__nr(evlist->cpus);
+ int cpu, thread;
+
+ for (cpu = 0; cpu < nr_cpus; cpu++) {
+ int output = -1;
+ int output_overwrite = -1;
+
+ for (thread = 0; thread < nr_threads; thread++) {
+ if (mmap_per_evsel(evlist, cpu, mp, cpu,
+ thread, &output, &output_overwrite))
+ goto out_unmap;
+ }
+ }
+
+ return 0;
+
+out_unmap:
+ perf_evlist__munmap(evlist);
+ return -1;
+}
+
+int perf_evlist__mmap(struct perf_evlist *evlist, int pages)
+{
+ struct perf_evsel *evsel;
+ const struct perf_cpu_map *cpus = evlist->cpus;
+ const struct perf_thread_map *threads = evlist->threads;
+ struct perf_mmap_param mp;
+
+ if (!evlist->mmap)
+ evlist->mmap = perf_evlist__alloc_mmap(evlist, false);
+ if (!evlist->mmap)
+ return -ENOMEM;
+
+ perf_evlist__for_each_entry(evlist, evsel) {
+ if ((evsel->attr.read_format & PERF_FORMAT_ID) &&
+ evsel->sample_id == NULL &&
+ perf_evsel__alloc_id(evsel, perf_cpu_map__nr(cpus), threads->nr) < 0)
+ return -ENOMEM;
+ }
+
+ evlist->mmap_len = (pages + 1) * page_size;
+ mp.mask = evlist->mmap_len - page_size - 1;
+
+ if (perf_cpu_map__empty(cpus))
+ return mmap_per_thread(evlist, &mp);
+
+ return mmap_per_cpu(evlist, &mp);
+}
+
+void perf_evlist__munmap(struct perf_evlist *evlist)
+{
+ int i;
+
+ if (evlist->mmap) {
+ for (i = 0; i < evlist->nr_mmaps; i++)
+ perf_mmap__munmap(&evlist->mmap[i]);
+ }
+
+ if (evlist->mmap_ovw) {
+ for (i = 0; i < evlist->nr_mmaps; i++)
+ perf_mmap__munmap(&evlist->mmap_ovw[i]);
+ }
+
+ zfree(&evlist->mmap);
+ zfree(&evlist->mmap_ovw);
+}
diff --git a/tools/perf/lib/include/internal/evlist.h b/tools/perf/lib/include/internal/evlist.h
index 9f440ab12b76..4438a19ceba3 100644
--- a/tools/perf/lib/include/internal/evlist.h
+++ b/tools/perf/lib/include/internal/evlist.h
@@ -22,6 +22,8 @@ struct perf_evlist {
size_t mmap_len;
struct fdarray pollfd;
struct hlist_head heads[PERF_EVLIST__HLIST_SIZE];
+ struct perf_mmap *mmap;
+ struct perf_mmap *mmap_ovw;
};
int perf_evlist__alloc_pollfd(struct perf_evlist *evlist);
diff --git a/tools/perf/lib/include/perf/evlist.h b/tools/perf/lib/include/perf/evlist.h
index 8a2ce0757ab2..28b6a12a8a2b 100644
--- a/tools/perf/lib/include/perf/evlist.h
+++ b/tools/perf/lib/include/perf/evlist.h
@@ -33,4 +33,7 @@ LIBPERF_API void perf_evlist__set_maps(struct perf_evlist *evlist,
struct perf_thread_map *threads);
LIBPERF_API int perf_evlist__poll(struct perf_evlist *evlist, int timeout);
+LIBPERF_API int perf_evlist__mmap(struct perf_evlist *evlist, int pages);
+LIBPERF_API void perf_evlist__munmap(struct perf_evlist *evlist);
+
#endif /* __LIBPERF_EVLIST_H */
diff --git a/tools/perf/lib/libperf.map b/tools/perf/lib/libperf.map
index 8bb0d73e0c6c..5a18fd1aacf2 100644
--- a/tools/perf/lib/libperf.map
+++ b/tools/perf/lib/libperf.map
@@ -40,6 +40,8 @@ LIBPERF_0.0.1 {
perf_evlist__next;
perf_evlist__set_maps;
perf_evlist__poll;
+ perf_evlist__mmap;
+ perf_evlist__munmap;
perf_mmap__consume;
perf_mmap__read_init;
perf_mmap__read_done;
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 14/36] libperf: Add perf_evlist__mmap_ops function
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (12 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 13/36] libperf: Add perf_evlist__mmap()/munmap() functions Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Introduce perf_evlist__mmap_ops() tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 15/36] libperf: Add perf_evlist_mmap_ops::idx callback Jiri Olsa
` (21 subsequent siblings)
35 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: Alexander Shishkin, Michael Petlan, Namhyung Kim, Peter Zijlstra,
lkml, Ingo Molnar
To be able to pass specific callbacks to evlist's mmap. There will be
specific call to this function from perf's evlist__mmap() and libperf's
perf_evlist__mmap() functions in following changes.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lore.kernel.org/lkml/20190913132355.21634-54-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/lib/evlist.c | 24 ++++++++++++++++++------
tools/perf/lib/include/internal/evlist.h | 8 ++++++++
2 files changed, 26 insertions(+), 6 deletions(-)
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index 250ad5752589..88d63f5cd9ca 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -472,12 +472,16 @@ mmap_per_cpu(struct perf_evlist *evlist, struct perf_mmap_param *mp)
return -1;
}
-int perf_evlist__mmap(struct perf_evlist *evlist, int pages)
+int perf_evlist__mmap_ops(struct perf_evlist *evlist,
+ struct perf_evlist_mmap_ops *ops,
+ struct perf_mmap_param *mp)
{
struct perf_evsel *evsel;
const struct perf_cpu_map *cpus = evlist->cpus;
const struct perf_thread_map *threads = evlist->threads;
- struct perf_mmap_param mp;
+
+ if (!ops)
+ return -EINVAL;
if (!evlist->mmap)
evlist->mmap = perf_evlist__alloc_mmap(evlist, false);
@@ -491,13 +495,21 @@ int perf_evlist__mmap(struct perf_evlist *evlist, int pages)
return -ENOMEM;
}
+ if (perf_cpu_map__empty(cpus))
+ return mmap_per_thread(evlist, mp);
+
+ return mmap_per_cpu(evlist, mp);
+}
+
+int perf_evlist__mmap(struct perf_evlist *evlist, int pages)
+{
+ struct perf_mmap_param mp;
+ struct perf_evlist_mmap_ops ops;
+
evlist->mmap_len = (pages + 1) * page_size;
mp.mask = evlist->mmap_len - page_size - 1;
- if (perf_cpu_map__empty(cpus))
- return mmap_per_thread(evlist, &mp);
-
- return mmap_per_cpu(evlist, &mp);
+ return perf_evlist__mmap_ops(evlist, &ops, &mp);
}
void perf_evlist__munmap(struct perf_evlist *evlist)
diff --git a/tools/perf/lib/include/internal/evlist.h b/tools/perf/lib/include/internal/evlist.h
index 4438a19ceba3..e5f092ff6202 100644
--- a/tools/perf/lib/include/internal/evlist.h
+++ b/tools/perf/lib/include/internal/evlist.h
@@ -11,6 +11,7 @@
struct perf_cpu_map;
struct perf_thread_map;
+struct perf_mmap_param;
struct perf_evlist {
struct list_head entries;
@@ -26,10 +27,17 @@ struct perf_evlist {
struct perf_mmap *mmap_ovw;
};
+struct perf_evlist_mmap_ops {
+};
+
int perf_evlist__alloc_pollfd(struct perf_evlist *evlist);
int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd,
void *ptr, short revent);
+int perf_evlist__mmap_ops(struct perf_evlist *evlist,
+ struct perf_evlist_mmap_ops *ops,
+ struct perf_mmap_param *mp);
+
/**
* __perf_evlist__for_each_entry - iterate thru all the evsels
* @list: list_head instance to iterate
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 15/36] libperf: Add perf_evlist_mmap_ops::idx callback
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (13 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 14/36] libperf: Add perf_evlist__mmap_ops function Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Introduce " tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 16/36] libperf: Add perf_evlist_mmap_ops::get callback Jiri Olsa
` (20 subsequent siblings)
35 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: Alexander Shishkin, Michael Petlan, Namhyung Kim, Peter Zijlstra,
lkml, Ingo Molnar
Add the perf_evlist_mmap_ops::idx callback to be called in mmap_per_cpu
and mmap_per_thread with current cpu and thread indexes.
It's used by current aux code, so perf will use this callback to set the
aux index.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lore.kernel.org/lkml/20190913132355.21634-55-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/lib/evlist.c | 18 +++++++++++++-----
tools/perf/lib/include/internal/evlist.h | 4 ++++
2 files changed, 17 insertions(+), 5 deletions(-)
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index 88d63f5cd9ca..3832d3e9a3b4 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -426,7 +426,8 @@ mmap_per_evsel(struct perf_evlist *evlist, int idx,
}
static int
-mmap_per_thread(struct perf_evlist *evlist, struct perf_mmap_param *mp)
+mmap_per_thread(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
+ struct perf_mmap_param *mp)
{
int thread;
int nr_threads = perf_thread_map__nr(evlist->threads);
@@ -435,6 +436,9 @@ mmap_per_thread(struct perf_evlist *evlist, struct perf_mmap_param *mp)
int output = -1;
int output_overwrite = -1;
+ if (ops->idx)
+ ops->idx(evlist, mp, thread, false);
+
if (mmap_per_evsel(evlist, thread, mp, 0, thread,
&output, &output_overwrite))
goto out_unmap;
@@ -448,7 +452,8 @@ mmap_per_thread(struct perf_evlist *evlist, struct perf_mmap_param *mp)
}
static int
-mmap_per_cpu(struct perf_evlist *evlist, struct perf_mmap_param *mp)
+mmap_per_cpu(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
+ struct perf_mmap_param *mp)
{
int nr_threads = perf_thread_map__nr(evlist->threads);
int nr_cpus = perf_cpu_map__nr(evlist->cpus);
@@ -458,6 +463,9 @@ mmap_per_cpu(struct perf_evlist *evlist, struct perf_mmap_param *mp)
int output = -1;
int output_overwrite = -1;
+ if (ops->idx)
+ ops->idx(evlist, mp, cpu, true);
+
for (thread = 0; thread < nr_threads; thread++) {
if (mmap_per_evsel(evlist, cpu, mp, cpu,
thread, &output, &output_overwrite))
@@ -496,15 +504,15 @@ int perf_evlist__mmap_ops(struct perf_evlist *evlist,
}
if (perf_cpu_map__empty(cpus))
- return mmap_per_thread(evlist, mp);
+ return mmap_per_thread(evlist, ops, mp);
- return mmap_per_cpu(evlist, mp);
+ return mmap_per_cpu(evlist, ops, mp);
}
int perf_evlist__mmap(struct perf_evlist *evlist, int pages)
{
struct perf_mmap_param mp;
- struct perf_evlist_mmap_ops ops;
+ struct perf_evlist_mmap_ops ops = { 0 };
evlist->mmap_len = (pages + 1) * page_size;
mp.mask = evlist->mmap_len - page_size - 1;
diff --git a/tools/perf/lib/include/internal/evlist.h b/tools/perf/lib/include/internal/evlist.h
index e5f092ff6202..053f620696f3 100644
--- a/tools/perf/lib/include/internal/evlist.h
+++ b/tools/perf/lib/include/internal/evlist.h
@@ -27,7 +27,11 @@ struct perf_evlist {
struct perf_mmap *mmap_ovw;
};
+typedef void
+(*perf_evlist_mmap__cb_idx_t)(struct perf_evlist*, struct perf_mmap_param*, int, bool);
+
struct perf_evlist_mmap_ops {
+ perf_evlist_mmap__cb_idx_t idx;
};
int perf_evlist__alloc_pollfd(struct perf_evlist *evlist);
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 16/36] libperf: Add perf_evlist_mmap_ops::get callback
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (14 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 15/36] libperf: Add perf_evlist_mmap_ops::idx callback Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] " tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 17/36] libperf: Add perf_evlist_mmap_ops::mmap callback Jiri Olsa
` (19 subsequent siblings)
35 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: Alexander Shishkin, Michael Petlan, Namhyung Kim, Peter Zijlstra,
lkml, Ingo Molnar
Add the perf_evlist_mmap_ops::get callback to be called in
mmap_per_evsel to get/allocate the 'struct perf_mmap' object.
Add the libperf's perf_evlist__mmap_cb_get() function as libperf's
get callback.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lore.kernel.org/lkml/20190913132355.21634-56-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/lib/evlist.c | 18 ++++++++++--------
tools/perf/lib/include/internal/evlist.h | 3 +++
2 files changed, 13 insertions(+), 8 deletions(-)
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index 3832d3e9a3b4..4f49de5e8f7c 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -340,7 +340,7 @@ static void perf_evlist__set_sid_idx(struct perf_evlist *evlist,
}
static struct perf_mmap*
-perf_evlist__map_get(struct perf_evlist *evlist, bool overwrite, int idx)
+perf_evlist__mmap_cb_get(struct perf_evlist *evlist, bool overwrite, int idx)
{
struct perf_mmap *map = &evlist->mmap[idx];
@@ -359,8 +359,8 @@ perf_evlist__map_get(struct perf_evlist *evlist, bool overwrite, int idx)
#define FD(e, x, y) (*(int *) xyarray__entry(e->fd, x, y))
static int
-mmap_per_evsel(struct perf_evlist *evlist, int idx,
- struct perf_mmap_param *mp, int cpu_idx,
+mmap_per_evsel(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
+ int idx, struct perf_mmap_param *mp, int cpu_idx,
int thread, int *_output, int *_output_overwrite)
{
int evlist_cpu = perf_cpu_map__cpu(evlist->cpus, cpu_idx);
@@ -379,7 +379,7 @@ mmap_per_evsel(struct perf_evlist *evlist, int idx,
if (cpu == -1)
continue;
- map = perf_evlist__map_get(evlist, overwrite, idx);
+ map = ops->get(evlist, overwrite, idx);
if (map == NULL)
return -ENOMEM;
@@ -439,7 +439,7 @@ mmap_per_thread(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
if (ops->idx)
ops->idx(evlist, mp, thread, false);
- if (mmap_per_evsel(evlist, thread, mp, 0, thread,
+ if (mmap_per_evsel(evlist, ops, thread, mp, 0, thread,
&output, &output_overwrite))
goto out_unmap;
}
@@ -467,7 +467,7 @@ mmap_per_cpu(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
ops->idx(evlist, mp, cpu, true);
for (thread = 0; thread < nr_threads; thread++) {
- if (mmap_per_evsel(evlist, cpu, mp, cpu,
+ if (mmap_per_evsel(evlist, ops, cpu, mp, cpu,
thread, &output, &output_overwrite))
goto out_unmap;
}
@@ -488,7 +488,7 @@ int perf_evlist__mmap_ops(struct perf_evlist *evlist,
const struct perf_cpu_map *cpus = evlist->cpus;
const struct perf_thread_map *threads = evlist->threads;
- if (!ops)
+ if (!ops || !ops->get)
return -EINVAL;
if (!evlist->mmap)
@@ -512,7 +512,9 @@ int perf_evlist__mmap_ops(struct perf_evlist *evlist,
int perf_evlist__mmap(struct perf_evlist *evlist, int pages)
{
struct perf_mmap_param mp;
- struct perf_evlist_mmap_ops ops = { 0 };
+ struct perf_evlist_mmap_ops ops = {
+ .get = perf_evlist__mmap_cb_get,
+ };
evlist->mmap_len = (pages + 1) * page_size;
mp.mask = evlist->mmap_len - page_size - 1;
diff --git a/tools/perf/lib/include/internal/evlist.h b/tools/perf/lib/include/internal/evlist.h
index 053f620696f3..9bc3a21643ea 100644
--- a/tools/perf/lib/include/internal/evlist.h
+++ b/tools/perf/lib/include/internal/evlist.h
@@ -29,9 +29,12 @@ struct perf_evlist {
typedef void
(*perf_evlist_mmap__cb_idx_t)(struct perf_evlist*, struct perf_mmap_param*, int, bool);
+typedef struct perf_mmap*
+(*perf_evlist_mmap__cb_get_t)(struct perf_evlist*, bool, int);
struct perf_evlist_mmap_ops {
perf_evlist_mmap__cb_idx_t idx;
+ perf_evlist_mmap__cb_get_t get;
};
int perf_evlist__alloc_pollfd(struct perf_evlist *evlist);
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 17/36] libperf: Add perf_evlist_mmap_ops::mmap callback
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (15 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 16/36] libperf: Add perf_evlist_mmap_ops::get callback Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Introduce " tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 18/36] perf tools: Add perf_evlist__mmap_cb_idx function Jiri Olsa
` (18 subsequent siblings)
35 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: lkml, Ingo Molnar, Namhyung Kim, Alexander Shishkin,
Peter Zijlstra, Michael Petlan
Adding perf_evlist_mmap_ops::mmap callback to be called
in mmap_per_evsel to actually mmap the map.
Adding libperf's perf_evlist__mmap_cb_mmap function as
libperf's mmap callback.
New mmaped map gets refcount set to 2 in mmap__mmap,
we follow that in mmap callback. We will move this to
common place after we switch to perf_evlist__mmap.
Link: http://lkml.kernel.org/n/tip-9cksnv3xbb1eset7ge67at4a@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/lib/evlist.c | 29 +++++++++++++++++++++---
tools/perf/lib/include/internal/evlist.h | 3 +++
2 files changed, 29 insertions(+), 3 deletions(-)
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index 4f49de5e8f7c..b69722627779 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -358,6 +358,28 @@ perf_evlist__mmap_cb_get(struct perf_evlist *evlist, bool overwrite, int idx)
#define FD(e, x, y) (*(int *) xyarray__entry(e->fd, x, y))
+static int
+perf_evlist__mmap_cb_mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
+ int output, int cpu)
+{
+ /*
+ * The last one will be done at perf_mmap__consume(), so that we
+ * make sure we don't prevent tools from consuming every last event in
+ * the ring buffer.
+ *
+ * I.e. we can get the POLLHUP meaning that the fd doesn't exist
+ * anymore, but the last events for it are still in the ring buffer,
+ * waiting to be consumed.
+ *
+ * Tools can chose to ignore this at their own discretion, but the
+ * evlist layer can't just drop it when filtering events in
+ * perf_evlist__filter_pollfd().
+ */
+ refcount_set(&map->refcnt, 2);
+
+ return perf_mmap__mmap(map, mp, output, cpu);
+}
+
static int
mmap_per_evsel(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
int idx, struct perf_mmap_param *mp, int cpu_idx,
@@ -396,7 +418,7 @@ mmap_per_evsel(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
if (*output == -1) {
*output = fd;
- if (perf_mmap__mmap(map, mp, *output, evlist_cpu) < 0)
+ if (ops->mmap(map, mp, *output, evlist_cpu) < 0)
return -1;
} else {
if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0)
@@ -488,7 +510,7 @@ int perf_evlist__mmap_ops(struct perf_evlist *evlist,
const struct perf_cpu_map *cpus = evlist->cpus;
const struct perf_thread_map *threads = evlist->threads;
- if (!ops || !ops->get)
+ if (!ops || !ops->get || !ops->mmap)
return -EINVAL;
if (!evlist->mmap)
@@ -513,7 +535,8 @@ int perf_evlist__mmap(struct perf_evlist *evlist, int pages)
{
struct perf_mmap_param mp;
struct perf_evlist_mmap_ops ops = {
- .get = perf_evlist__mmap_cb_get,
+ .get = perf_evlist__mmap_cb_get,
+ .mmap = perf_evlist__mmap_cb_mmap,
};
evlist->mmap_len = (pages + 1) * page_size;
diff --git a/tools/perf/lib/include/internal/evlist.h b/tools/perf/lib/include/internal/evlist.h
index 9bc3a21643ea..b2019700cdc0 100644
--- a/tools/perf/lib/include/internal/evlist.h
+++ b/tools/perf/lib/include/internal/evlist.h
@@ -31,10 +31,13 @@ typedef void
(*perf_evlist_mmap__cb_idx_t)(struct perf_evlist*, struct perf_mmap_param*, int, bool);
typedef struct perf_mmap*
(*perf_evlist_mmap__cb_get_t)(struct perf_evlist*, bool, int);
+typedef int
+(*perf_evlist_mmap__cb_mmap_t)(struct perf_mmap*, struct perf_mmap_param*, int, int);
struct perf_evlist_mmap_ops {
perf_evlist_mmap__cb_idx_t idx;
perf_evlist_mmap__cb_get_t get;
+ perf_evlist_mmap__cb_mmap_t mmap;
};
int perf_evlist__alloc_pollfd(struct perf_evlist *evlist);
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 18/36] perf tools: Add perf_evlist__mmap_cb_idx function
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (16 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 17/36] libperf: Add perf_evlist_mmap_ops::mmap callback Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] perf tools: Introduce perf_evlist__mmap_cb_idx() tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 19/36] perf tools: Add perf_evlist__mmap_cb_get function Jiri Olsa
` (17 subsequent siblings)
35 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: lkml, Ingo Molnar, Namhyung Kim, Alexander Shishkin,
Peter Zijlstra, Michael Petlan
Adding perf_evlist__mmap_cb_idx function to call
auxtrace_mmap_params__set_idx on each new index
during perf_evlist__mmap_ops call.
Link: http://lkml.kernel.org/n/tip-26emdgzve9miryyzvcr77qgh@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/util/evlist.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 09fe8fe9805d..71fdc6c92920 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -715,6 +715,17 @@ static int evlist__mmap_per_evsel(struct evlist *evlist, int idx,
return 0;
}
+static void
+perf_evlist__mmap_cb_idx(struct perf_evlist *_evlist,
+ struct perf_mmap_param *_mp,
+ int idx, bool per_cpu)
+{
+ struct evlist *evlist = container_of(_evlist, struct evlist, core);
+ struct mmap_params *mp = container_of(_mp, struct mmap_params, core);
+
+ auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, idx, per_cpu);
+}
+
static int evlist__mmap_per_cpu(struct evlist *evlist,
struct mmap_params *mp)
{
@@ -911,6 +922,9 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
.flush = flush,
.comp_level = comp_level
};
+ struct perf_evlist_mmap_ops ops __maybe_unused = {
+ .idx = perf_evlist__mmap_cb_idx,
+ };
if (!evlist->mmap)
evlist->mmap = evlist__alloc_mmap(evlist, false);
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 19/36] perf tools: Add perf_evlist__mmap_cb_get function
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (17 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 18/36] perf tools: Add perf_evlist__mmap_cb_idx function Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] perf evlist: Introduce perf_evlist__mmap_cb_get() tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 20/36] perf tools: Add perf_evlist__mmap_cb_mmap function Jiri Olsa
` (16 subsequent siblings)
35 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: lkml, Ingo Molnar, Namhyung Kim, Alexander Shishkin,
Peter Zijlstra, Michael Petlan
Adding perf_evlist__mmap_cb_get function to return 'struct perf_mmap'
object during perf_evlist__mmap_ops call.
The array of 'struct mmap' is allocated via evlist__alloc_mmap,
in this callback we simply returns pointer to the base object.
Link: http://lkml.kernel.org/n/tip-tiyl8aymuk3fv9j033yo8d1v@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/util/evlist.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 71fdc6c92920..a59303de3421 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -726,6 +726,29 @@ perf_evlist__mmap_cb_idx(struct perf_evlist *_evlist,
auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, idx, per_cpu);
}
+static struct perf_mmap*
+perf_evlist__mmap_cb_get(struct perf_evlist *_evlist, bool overwrite, int idx)
+{
+ struct evlist *evlist = container_of(_evlist, struct evlist, core);
+ struct mmap *maps = evlist->mmap;
+
+ if (overwrite) {
+ maps = evlist->overwrite_mmap;
+
+ if (!maps) {
+ maps = evlist__alloc_mmap(evlist, true);
+ if (!maps)
+ return NULL;
+
+ evlist->overwrite_mmap = maps;
+ if (evlist->bkw_mmap_state == BKW_MMAP_NOTREADY)
+ perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING);
+ }
+ }
+
+ return &maps[idx].core;
+}
+
static int evlist__mmap_per_cpu(struct evlist *evlist,
struct mmap_params *mp)
{
@@ -924,6 +947,7 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
};
struct perf_evlist_mmap_ops ops __maybe_unused = {
.idx = perf_evlist__mmap_cb_idx,
+ .get = perf_evlist__mmap_cb_get,
};
if (!evlist->mmap)
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 20/36] perf tools: Add perf_evlist__mmap_cb_mmap function
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (18 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 19/36] perf tools: Add perf_evlist__mmap_cb_get function Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] perf evlist: Introduce perf_evlist__mmap_cb_mmap() tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 21/36] perf tools: Switch to libperf mmap interface Jiri Olsa
` (15 subsequent siblings)
35 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: lkml, Ingo Molnar, Namhyung Kim, Alexander Shishkin,
Peter Zijlstra, Michael Petlan
Adding perf_evlist__mmap_cb_mmap function to call perf
specific mmap__mmap function during perf_evlist__mmap_ops
call.
Link: http://lkml.kernel.org/n/tip-38lonlyp6kzfartpl20qy2dy@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/util/evlist.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index a59303de3421..e7216139f37a 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -749,6 +749,16 @@ perf_evlist__mmap_cb_get(struct perf_evlist *_evlist, bool overwrite, int idx)
return &maps[idx].core;
}
+static int
+perf_evlist__mmap_cb_mmap(struct perf_mmap *_map, struct perf_mmap_param *_mp,
+ int output, int cpu)
+{
+ struct mmap *map = container_of(_map, struct mmap, core);
+ struct mmap_params *mp = container_of(_mp, struct mmap_params, core);
+
+ return mmap__mmap(map, mp, output, cpu);
+}
+
static int evlist__mmap_per_cpu(struct evlist *evlist,
struct mmap_params *mp)
{
@@ -946,8 +956,9 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
.comp_level = comp_level
};
struct perf_evlist_mmap_ops ops __maybe_unused = {
- .idx = perf_evlist__mmap_cb_idx,
- .get = perf_evlist__mmap_cb_get,
+ .idx = perf_evlist__mmap_cb_idx,
+ .get = perf_evlist__mmap_cb_get,
+ .mmap = perf_evlist__mmap_cb_mmap,
};
if (!evlist->mmap)
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 21/36] perf tools: Switch to libperf mmap interface
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (19 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 20/36] perf tools: Add perf_evlist__mmap_cb_mmap function Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] perf evlist: Switch to libperf's " tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 22/36] libperf: Centralize map refcnt setting Jiri Olsa
` (14 subsequent siblings)
35 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: lkml, Ingo Molnar, Namhyung Kim, Alexander Shishkin,
Peter Zijlstra, Michael Petlan
Switching to libperf mmap interface by calling directly
perf_evlist__mmap_ops and removing perf's evlist__mmap_per_*
functions.
By switching libperf perf_evlist__mmap we need to operate
over 'struct perf_mmap' in evlist__add_pollfd, so making
related changes there.
Link: http://lkml.kernel.org/n/tip-de3008b8kzdup7qn5jxol0ie@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/util/evlist.c | 179 +--------------------------------------
1 file changed, 4 insertions(+), 175 deletions(-)
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index e7216139f37a..bbefb81a6364 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -407,10 +407,10 @@ int evlist__add_pollfd(struct evlist *evlist, int fd)
static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd,
void *arg __maybe_unused)
{
- struct mmap *map = fda->priv[fd].ptr;
+ struct perf_mmap *map = fda->priv[fd].ptr;
if (map)
- perf_mmap__put(&map->core);
+ perf_mmap__put(map);
}
int evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask)
@@ -424,22 +424,6 @@ int evlist__poll(struct evlist *evlist, int timeout)
return perf_evlist__poll(&evlist->core, timeout);
}
-static void perf_evlist__set_sid_idx(struct evlist *evlist,
- struct evsel *evsel, int idx, int cpu,
- int thread)
-{
- struct perf_sample_id *sid = SID(evsel, cpu, thread);
- sid->idx = idx;
- if (evlist->core.cpus && cpu >= 0)
- sid->cpu = evlist->core.cpus->map[cpu];
- else
- sid->cpu = -1;
- if (!evsel->core.system_wide && evlist->core.threads && thread >= 0)
- sid->tid = perf_thread_map__pid(evlist->core.threads, thread);
- else
- sid->tid = -1;
-}
-
struct perf_sample_id *perf_evlist__id2sid(struct evlist *evlist, u64 id)
{
struct hlist_head *head;
@@ -628,93 +612,6 @@ static struct mmap *evlist__alloc_mmap(struct evlist *evlist,
return map;
}
-static bool
-perf_evlist__should_poll(struct evlist *evlist __maybe_unused,
- struct evsel *evsel)
-{
- if (evsel->core.attr.write_backward)
- return false;
- return true;
-}
-
-static int evlist__mmap_per_evsel(struct evlist *evlist, int idx,
- struct mmap_params *mp, int cpu_idx,
- int thread, int *_output, int *_output_overwrite)
-{
- struct evsel *evsel;
- int revent;
- int evlist_cpu = cpu_map__cpu(evlist->core.cpus, cpu_idx);
-
- evlist__for_each_entry(evlist, evsel) {
- struct mmap *maps = evlist->mmap;
- int *output = _output;
- int fd;
- int cpu;
-
- mp->core.prot = PROT_READ | PROT_WRITE;
- if (evsel->core.attr.write_backward) {
- output = _output_overwrite;
- maps = evlist->overwrite_mmap;
-
- if (!maps) {
- maps = evlist__alloc_mmap(evlist, true);
- if (!maps)
- return -1;
- evlist->overwrite_mmap = maps;
- if (evlist->bkw_mmap_state == BKW_MMAP_NOTREADY)
- perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING);
- }
- mp->core.prot &= ~PROT_WRITE;
- }
-
- if (evsel->core.system_wide && thread)
- continue;
-
- cpu = perf_cpu_map__idx(evsel->core.cpus, evlist_cpu);
- if (cpu == -1)
- continue;
-
- fd = FD(evsel, cpu, thread);
-
- if (*output == -1) {
- *output = fd;
-
- if (mmap__mmap(&maps[idx], mp, *output, evlist_cpu) < 0)
- return -1;
- } else {
- if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0)
- return -1;
-
- perf_mmap__get(&maps[idx].core);
- }
-
- revent = perf_evlist__should_poll(evlist, evsel) ? POLLIN : 0;
-
- /*
- * The system_wide flag causes a selected event to be opened
- * always without a pid. Consequently it will never get a
- * POLLHUP, but it is used for tracking in combination with
- * other events, so it should not need to be polled anyway.
- * Therefore don't add it for polling.
- */
- if (!evsel->core.system_wide &&
- perf_evlist__add_pollfd(&evlist->core, fd, &maps[idx], revent) < 0) {
- perf_mmap__put(&maps[idx].core);
- return -1;
- }
-
- if (evsel->core.attr.read_format & PERF_FORMAT_ID) {
- if (perf_evlist__id_add_fd(&evlist->core, &evsel->core, cpu, thread,
- fd) < 0)
- return -1;
- perf_evlist__set_sid_idx(evlist, evsel, idx, cpu,
- thread);
- }
- }
-
- return 0;
-}
-
static void
perf_evlist__mmap_cb_idx(struct perf_evlist *_evlist,
struct perf_mmap_param *_mp,
@@ -759,61 +656,6 @@ perf_evlist__mmap_cb_mmap(struct perf_mmap *_map, struct perf_mmap_param *_mp,
return mmap__mmap(map, mp, output, cpu);
}
-static int evlist__mmap_per_cpu(struct evlist *evlist,
- struct mmap_params *mp)
-{
- int cpu, thread;
- int nr_cpus = perf_cpu_map__nr(evlist->core.cpus);
- int nr_threads = perf_thread_map__nr(evlist->core.threads);
-
- pr_debug2("perf event ring buffer mmapped per cpu\n");
- for (cpu = 0; cpu < nr_cpus; cpu++) {
- int output = -1;
- int output_overwrite = -1;
-
- auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, cpu,
- true);
-
- for (thread = 0; thread < nr_threads; thread++) {
- if (evlist__mmap_per_evsel(evlist, cpu, mp, cpu,
- thread, &output, &output_overwrite))
- goto out_unmap;
- }
- }
-
- return 0;
-
-out_unmap:
- evlist__munmap_nofree(evlist);
- return -1;
-}
-
-static int evlist__mmap_per_thread(struct evlist *evlist,
- struct mmap_params *mp)
-{
- int thread;
- int nr_threads = perf_thread_map__nr(evlist->core.threads);
-
- pr_debug2("perf event ring buffer mmapped per thread\n");
- for (thread = 0; thread < nr_threads; thread++) {
- int output = -1;
- int output_overwrite = -1;
-
- auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, thread,
- false);
-
- if (evlist__mmap_per_evsel(evlist, thread, mp, 0, thread,
- &output, &output_overwrite))
- goto out_unmap;
- }
-
- return 0;
-
-out_unmap:
- evlist__munmap_nofree(evlist);
- return -1;
-}
-
unsigned long perf_event_mlock_kb_in_pages(void)
{
unsigned long pages;
@@ -941,9 +783,6 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
bool auxtrace_overwrite, int nr_cblocks, int affinity, int flush,
int comp_level)
{
- struct evsel *evsel;
- const struct perf_cpu_map *cpus = evlist->core.cpus;
- const struct perf_thread_map *threads = evlist->core.threads;
/*
* Delay setting mp.prot: set it before calling perf_mmap__mmap.
* Its value is decided by evsel's write_backward.
@@ -955,7 +794,7 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
.flush = flush,
.comp_level = comp_level
};
- struct perf_evlist_mmap_ops ops __maybe_unused = {
+ struct perf_evlist_mmap_ops ops = {
.idx = perf_evlist__mmap_cb_idx,
.get = perf_evlist__mmap_cb_get,
.mmap = perf_evlist__mmap_cb_mmap,
@@ -976,17 +815,7 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
auxtrace_mmap_params__init(&mp.auxtrace_mp, evlist->core.mmap_len,
auxtrace_pages, auxtrace_overwrite);
- evlist__for_each_entry(evlist, evsel) {
- if ((evsel->core.attr.read_format & PERF_FORMAT_ID) &&
- evsel->core.sample_id == NULL &&
- perf_evsel__alloc_id(&evsel->core, perf_cpu_map__nr(cpus), threads->nr) < 0)
- return -ENOMEM;
- }
-
- if (perf_cpu_map__empty(cpus))
- return evlist__mmap_per_thread(evlist, &mp);
-
- return evlist__mmap_per_cpu(evlist, &mp);
+ return perf_evlist__mmap_ops(&evlist->core, &ops, &mp.core);
}
int evlist__mmap(struct evlist *evlist, unsigned int pages)
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 22/36] libperf: Centralize map refcnt setting
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (20 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 21/36] perf tools: Switch to libperf mmap interface Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] " tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 23/36] libperf: Move pollfd allocation to libperf Jiri Olsa
` (13 subsequent siblings)
35 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: lkml, Ingo Molnar, Namhyung Kim, Alexander Shishkin,
Peter Zijlstra, Michael Petlan
Currently when new map is mmaps we set its refcnt
to 2 in perf_evlist_mmap_ops::mmap callback.
Every mmap is given refcnt set to 2 when it's first mmaped:
- 1 for current user, which will be taken out by call to
perf_evlist__munmap_filtered, where we find out there's
no more data comming from kernel to this mmap
- 1 for drain code where in perf_mmap__consume the mmap
is released if it is empty
Moving this common setup into libperf generic code
before mmap callback is called.
Link: http://lkml.kernel.org/n/tip-3us74tjjz258bgk2pavjaq59@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/lib/evlist.c | 30 +++++++++++++++---------------
tools/perf/util/mmap.c | 15 ---------------
2 files changed, 15 insertions(+), 30 deletions(-)
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index b69722627779..f9a802d2ceb5 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -362,21 +362,6 @@ static int
perf_evlist__mmap_cb_mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
int output, int cpu)
{
- /*
- * The last one will be done at perf_mmap__consume(), so that we
- * make sure we don't prevent tools from consuming every last event in
- * the ring buffer.
- *
- * I.e. we can get the POLLHUP meaning that the fd doesn't exist
- * anymore, but the last events for it are still in the ring buffer,
- * waiting to be consumed.
- *
- * Tools can chose to ignore this at their own discretion, but the
- * evlist layer can't just drop it when filtering events in
- * perf_evlist__filter_pollfd().
- */
- refcount_set(&map->refcnt, 2);
-
return perf_mmap__mmap(map, mp, output, cpu);
}
@@ -418,6 +403,21 @@ mmap_per_evsel(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
if (*output == -1) {
*output = fd;
+ /*
+ * The last one will be done at perf_mmap__consume(), so that we
+ * make sure we don't prevent tools from consuming every last event in
+ * the ring buffer.
+ *
+ * I.e. we can get the POLLHUP meaning that the fd doesn't exist
+ * anymore, but the last events for it are still in the ring buffer,
+ * waiting to be consumed.
+ *
+ * Tools can chose to ignore this at their own discretion, but the
+ * evlist layer can't just drop it when filtering events in
+ * perf_evlist__filter_pollfd().
+ */
+ refcount_set(&map->refcnt, 2);
+
if (ops->mmap(map, mp, *output, evlist_cpu) < 0)
return -1;
} else {
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index 2a8bf0ab861c..063d1b93c53d 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -243,21 +243,6 @@ static void perf_mmap__setup_affinity_mask(struct mmap *map, struct mmap_params
int mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu)
{
- /*
- * The last one will be done at perf_mmap__consume(), so that we
- * make sure we don't prevent tools from consuming every last event in
- * the ring buffer.
- *
- * I.e. we can get the POLLHUP meaning that the fd doesn't exist
- * anymore, but the last events for it are still in the ring buffer,
- * waiting to be consumed.
- *
- * Tools can chose to ignore this at their own discretion, but the
- * evlist layer can't just drop it when filtering events in
- * perf_evlist__filter_pollfd().
- */
- refcount_set(&map->core.refcnt, 2);
-
if (perf_mmap__mmap(&map->core, &mp->core, fd, cpu)) {
pr_debug2("failed to mmap perf event ring buffer, error %d\n",
errno);
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 23/36] libperf: Move pollfd allocation to libperf
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (21 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 22/36] libperf: Centralize map refcnt setting Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Move the pollfd allocation from tools/perf " tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 24/36] libperf: Add perf_evlist__exit function Jiri Olsa
` (12 subsequent siblings)
35 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: lkml, Ingo Molnar, Namhyung Kim, Alexander Shishkin,
Peter Zijlstra, Michael Petlan
It's needed in libperf only, moving it to
perf_evlist__mmap_ops function.
Link: http://lkml.kernel.org/n/tip-7lmjzpk6k2wfhh1os8qw1dxz@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/lib/evlist.c | 5 +++++
tools/perf/util/evlist.c | 4 ----
2 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index f9a802d2ceb5..5ae1da97d2e6 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -34,6 +34,7 @@ void perf_evlist__init(struct perf_evlist *evlist)
INIT_HLIST_HEAD(&evlist->heads[i]);
INIT_LIST_HEAD(&evlist->entries);
evlist->nr_entries = 0;
+ fdarray__init(&evlist->pollfd, 64);
}
static void __perf_evlist__propagate_maps(struct perf_evlist *evlist,
@@ -114,6 +115,7 @@ void perf_evlist__delete(struct perf_evlist *evlist)
return;
perf_evlist__munmap(evlist);
+ fdarray__exit(&evlist->pollfd);
free(evlist);
}
@@ -525,6 +527,9 @@ int perf_evlist__mmap_ops(struct perf_evlist *evlist,
return -ENOMEM;
}
+ if (evlist->pollfd.entries == NULL && perf_evlist__alloc_pollfd(evlist) < 0)
+ return -ENOMEM;
+
if (perf_cpu_map__empty(cpus))
return mmap_per_thread(evlist, ops, mp);
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index bbefb81a6364..71679cce7257 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -58,7 +58,6 @@ void evlist__init(struct evlist *evlist, struct perf_cpu_map *cpus,
{
perf_evlist__init(&evlist->core);
perf_evlist__set_maps(&evlist->core, cpus, threads);
- fdarray__init(&evlist->core.pollfd, 64);
evlist->workload.pid = -1;
evlist->bkw_mmap_state = BKW_MMAP_NOTREADY;
}
@@ -805,9 +804,6 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
if (!evlist->mmap)
return -ENOMEM;
- if (evlist->core.pollfd.entries == NULL && perf_evlist__alloc_pollfd(&evlist->core) < 0)
- return -ENOMEM;
-
evlist->core.mmap_len = evlist__mmap_size(pages);
pr_debug("mmap size %zuB\n", evlist->core.mmap_len);
mp.core.mask = evlist->core.mmap_len - page_size - 1;
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 24/36] libperf: Add perf_evlist__exit function
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (22 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 23/36] libperf: Move pollfd allocation to libperf Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Introduce perf_evlist__exit() tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 25/36] libperf: Add perf_evlist__purge function Jiri Olsa
` (11 subsequent siblings)
35 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: lkml, Ingo Molnar, Namhyung Kim, Alexander Shishkin,
Peter Zijlstra, Michael Petlan
Adding perf_evlist__exit function, so far it's not
exported and added only for internal use for perf
and libperf.
Using it to release cpus/threads and pollfd array.
Link: http://lkml.kernel.org/n/tip-1n61vkdnvfqaeb7k4mwlvs1h@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/lib/evlist.c | 12 +++++++++++-
tools/perf/lib/include/internal/evlist.h | 2 ++
tools/perf/util/evlist.c | 6 +-----
3 files changed, 14 insertions(+), 6 deletions(-)
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index 5ae1da97d2e6..7ba98f0e6365 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -109,13 +109,23 @@ perf_evlist__next(struct perf_evlist *evlist, struct perf_evsel *prev)
return next;
}
+void perf_evlist__exit(struct perf_evlist *evlist)
+{
+ perf_cpu_map__put(evlist->cpus);
+ perf_thread_map__put(evlist->threads);
+ evlist->cpus = NULL;
+ evlist->threads = NULL;
+ fdarray__exit(&evlist->pollfd);
+}
+
void perf_evlist__delete(struct perf_evlist *evlist)
{
if (evlist == NULL)
return;
perf_evlist__munmap(evlist);
- fdarray__exit(&evlist->pollfd);
+ perf_evlist__close(evlist);
+ perf_evlist__exit(evlist);
free(evlist);
}
diff --git a/tools/perf/lib/include/internal/evlist.h b/tools/perf/lib/include/internal/evlist.h
index b2019700cdc0..0721512ffb19 100644
--- a/tools/perf/lib/include/internal/evlist.h
+++ b/tools/perf/lib/include/internal/evlist.h
@@ -48,6 +48,8 @@ int perf_evlist__mmap_ops(struct perf_evlist *evlist,
struct perf_evlist_mmap_ops *ops,
struct perf_mmap_param *mp);
+void perf_evlist__exit(struct perf_evlist *evlist);
+
/**
* __perf_evlist__for_each_entry - iterate thru all the evsels
* @list: list_head instance to iterate
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 71679cce7257..3669ca767340 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -138,7 +138,7 @@ void evlist__exit(struct evlist *evlist)
{
zfree(&evlist->mmap);
zfree(&evlist->overwrite_mmap);
- fdarray__exit(&evlist->core.pollfd);
+ perf_evlist__exit(&evlist->core);
}
void evlist__delete(struct evlist *evlist)
@@ -148,10 +148,6 @@ void evlist__delete(struct evlist *evlist)
evlist__munmap(evlist);
evlist__close(evlist);
- perf_cpu_map__put(evlist->core.cpus);
- perf_thread_map__put(evlist->core.threads);
- evlist->core.cpus = NULL;
- evlist->core.threads = NULL;
evlist__purge(evlist);
evlist__exit(evlist);
free(evlist);
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 25/36] libperf: Add perf_evlist__purge function
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (23 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 24/36] libperf: Add perf_evlist__exit function Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Introduce perf_evlist__purge() tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 26/36] libperf: Add perf_evlist__filter_pollfd function Jiri Olsa
` (10 subsequent siblings)
35 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: lkml, Ingo Molnar, Namhyung Kim, Alexander Shishkin,
Peter Zijlstra, Michael Petlan
Adding static perf_evlist__purge function to purge
and delete evsels from evlist.
Adding also perf_evlist__for_each_entry_safe which
is used by perf_evlist__purge.
Link: http://lkml.kernel.org/n/tip-xcwsmyqcxe8zgbpapn27f8n9@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/lib/evlist.c | 13 +++++++++++++
tools/perf/lib/include/internal/evlist.h | 18 ++++++++++++++++++
2 files changed, 31 insertions(+)
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index 7ba98f0e6365..9534ad9a572f 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -109,6 +109,18 @@ perf_evlist__next(struct perf_evlist *evlist, struct perf_evsel *prev)
return next;
}
+static void perf_evlist__purge(struct perf_evlist *evlist)
+{
+ struct perf_evsel *pos, *n;
+
+ perf_evlist__for_each_entry_safe(evlist, n, pos) {
+ list_del_init(&pos->node);
+ perf_evsel__delete(pos);
+ }
+
+ evlist->nr_entries = 0;
+}
+
void perf_evlist__exit(struct perf_evlist *evlist)
{
perf_cpu_map__put(evlist->cpus);
@@ -125,6 +137,7 @@ void perf_evlist__delete(struct perf_evlist *evlist)
perf_evlist__munmap(evlist);
perf_evlist__close(evlist);
+ perf_evlist__purge(evlist);
perf_evlist__exit(evlist);
free(evlist);
}
diff --git a/tools/perf/lib/include/internal/evlist.h b/tools/perf/lib/include/internal/evlist.h
index 0721512ffb19..be0b25a70730 100644
--- a/tools/perf/lib/include/internal/evlist.h
+++ b/tools/perf/lib/include/internal/evlist.h
@@ -82,6 +82,24 @@ void perf_evlist__exit(struct perf_evlist *evlist);
#define perf_evlist__for_each_entry_reverse(evlist, evsel) \
__perf_evlist__for_each_entry_reverse(&(evlist)->entries, evsel)
+/**
+ * __perf_evlist__for_each_entry_safe - safely iterate thru all the evsels
+ * @list: list_head instance to iterate
+ * @tmp: struct evsel temp iterator
+ * @evsel: struct evsel iterator
+ */
+#define __perf_evlist__for_each_entry_safe(list, tmp, evsel) \
+ list_for_each_entry_safe(evsel, tmp, list, node)
+
+/**
+ * perf_evlist__for_each_entry_safe - safely iterate thru all the evsels
+ * @evlist: evlist instance to iterate
+ * @evsel: struct evsel iterator
+ * @tmp: struct evsel temp iterator
+ */
+#define perf_evlist__for_each_entry_safe(evlist, tmp, evsel) \
+ __perf_evlist__for_each_entry_safe(&(evlist)->entries, tmp, evsel)
+
static inline struct perf_evsel *perf_evlist__first(struct perf_evlist *evlist)
{
return list_entry(evlist->entries.next, struct perf_evsel, node);
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 26/36] libperf: Add perf_evlist__filter_pollfd function
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (24 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 25/36] libperf: Add perf_evlist__purge function Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Adopt perf_evlist__filter_pollfd() from tools/perf tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 27/36] libperf: Add perf_evlist__for_each_mmap function Jiri Olsa
` (9 subsequent siblings)
35 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: lkml, Ingo Molnar, Namhyung Kim, Alexander Shishkin,
Peter Zijlstra, Michael Petlan
Adding perf_evlist__filter_pollfd function and exporting
it in perf/evlist.h header, so libperf users can check if
descriptor is still alive.
Link: http://lkml.kernel.org/n/tip-7lmjzpk6k2wfhh1os8qw1dxz@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/lib/evlist.c | 15 +++++++++++++++
tools/perf/lib/include/perf/evlist.h | 2 ++
tools/perf/lib/libperf.map | 1 +
tools/perf/util/evlist.c | 12 +-----------
4 files changed, 19 insertions(+), 11 deletions(-)
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index 9534ad9a572f..65045614c938 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -313,6 +313,21 @@ int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd,
return pos;
}
+static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd,
+ void *arg __maybe_unused)
+{
+ struct perf_mmap *map = fda->priv[fd].ptr;
+
+ if (map)
+ perf_mmap__put(map);
+}
+
+int perf_evlist__filter_pollfd(struct perf_evlist *evlist, short revents_and_mask)
+{
+ return fdarray__filter(&evlist->pollfd, revents_and_mask,
+ perf_evlist__munmap_filtered, NULL);
+}
+
int perf_evlist__poll(struct perf_evlist *evlist, int timeout)
{
return fdarray__poll(&evlist->pollfd, timeout);
diff --git a/tools/perf/lib/include/perf/evlist.h b/tools/perf/lib/include/perf/evlist.h
index 28b6a12a8a2b..16f526e74d13 100644
--- a/tools/perf/lib/include/perf/evlist.h
+++ b/tools/perf/lib/include/perf/evlist.h
@@ -32,6 +32,8 @@ LIBPERF_API void perf_evlist__set_maps(struct perf_evlist *evlist,
struct perf_cpu_map *cpus,
struct perf_thread_map *threads);
LIBPERF_API int perf_evlist__poll(struct perf_evlist *evlist, int timeout);
+LIBPERF_API int perf_evlist__filter_pollfd(struct perf_evlist *evlist,
+ short revents_and_mask);
LIBPERF_API int perf_evlist__mmap(struct perf_evlist *evlist, int pages);
LIBPERF_API void perf_evlist__munmap(struct perf_evlist *evlist);
diff --git a/tools/perf/lib/libperf.map b/tools/perf/lib/libperf.map
index 5a18fd1aacf2..2184aba36c3f 100644
--- a/tools/perf/lib/libperf.map
+++ b/tools/perf/lib/libperf.map
@@ -42,6 +42,7 @@ LIBPERF_0.0.1 {
perf_evlist__poll;
perf_evlist__mmap;
perf_evlist__munmap;
+ perf_evlist__filter_pollfd;
perf_mmap__consume;
perf_mmap__read_init;
perf_mmap__read_done;
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 3669ca767340..4910ae711b13 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -399,19 +399,9 @@ int evlist__add_pollfd(struct evlist *evlist, int fd)
return perf_evlist__add_pollfd(&evlist->core, fd, NULL, POLLIN);
}
-static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd,
- void *arg __maybe_unused)
-{
- struct perf_mmap *map = fda->priv[fd].ptr;
-
- if (map)
- perf_mmap__put(map);
-}
-
int evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask)
{
- return fdarray__filter(&evlist->core.pollfd, revents_and_mask,
- perf_evlist__munmap_filtered, NULL);
+ return perf_evlist__filter_pollfd(&evlist->core, revents_and_mask);
}
int evlist__poll(struct evlist *evlist, int timeout)
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 27/36] libperf: Add perf_evlist__for_each_mmap function
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (25 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 26/36] libperf: Add perf_evlist__filter_pollfd function Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-10 16:06 ` Arnaldo Carvalho de Melo
2019-10-07 12:53 ` [PATCH 28/36] libperf: Move mmap allocation to perf_evlist__mmap_ops::get Jiri Olsa
` (8 subsequent siblings)
35 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: lkml, Ingo Molnar, Namhyung Kim, Alexander Shishkin,
Peter Zijlstra, Michael Petlan
Adding perf_evlist__for_each_mmap function and exporting
it in perf/evlist.h header, so user can iterate through
'struct perf_mmap' objects.
Adding internal perf_mmap__link function to do the actual
linking.
Link: http://lkml.kernel.org/n/tip-5h62ytvpxgozhqix2y41cvex@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/lib/evlist.c | 26 +++++++++++++++++++++++-
tools/perf/lib/include/internal/evlist.h | 2 ++
tools/perf/lib/include/internal/mmap.h | 5 +++--
tools/perf/lib/include/perf/evlist.h | 9 ++++++++
tools/perf/lib/libperf.map | 1 +
tools/perf/lib/mmap.c | 6 ++++--
tools/perf/util/evlist.c | 4 +++-
7 files changed, 47 insertions(+), 6 deletions(-)
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index 65045614c938..4e85d9bb92bf 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -347,6 +347,8 @@ static struct perf_mmap* perf_evlist__alloc_mmap(struct perf_evlist *evlist, boo
return NULL;
for (i = 0; i < evlist->nr_mmaps; i++) {
+ struct perf_mmap *prev = i ? &map[i - 1] : NULL;
+
/*
* When the perf_mmap() call is made we grab one refcount, plus
* one extra to let perf_mmap__consume() get the last
@@ -356,7 +358,7 @@ static struct perf_mmap* perf_evlist__alloc_mmap(struct perf_evlist *evlist, boo
* Each PERF_EVENT_IOC_SET_OUTPUT points to this mmap and
* thus does perf_mmap__get() on it.
*/
- perf_mmap__init(&map[i], overwrite, NULL);
+ perf_mmap__init(&map[i], prev, overwrite, NULL);
}
return map;
@@ -405,6 +407,15 @@ perf_evlist__mmap_cb_mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
return perf_mmap__mmap(map, mp, output, cpu);
}
+static void perf_evlist__set_mmap0(struct perf_evlist *evlist, struct perf_mmap *map,
+ bool overwrite)
+{
+ if (overwrite)
+ evlist->mmap_ovw0 = map;
+ else
+ evlist->mmap0 = map;
+}
+
static int
mmap_per_evsel(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
int idx, struct perf_mmap_param *mp, int cpu_idx,
@@ -460,6 +471,9 @@ mmap_per_evsel(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
if (ops->mmap(map, mp, *output, evlist_cpu) < 0)
return -1;
+
+ if (!idx)
+ perf_evlist__set_mmap0(evlist, map, overwrite);
} else {
if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0)
return -1;
@@ -605,3 +619,13 @@ void perf_evlist__munmap(struct perf_evlist *evlist)
zfree(&evlist->mmap);
zfree(&evlist->mmap_ovw);
}
+
+struct perf_mmap*
+perf_evlist__next_mmap(struct perf_evlist *evlist, struct perf_mmap *map,
+ bool overwrite)
+{
+ if (map)
+ return map->next;
+
+ return overwrite ? evlist->mmap_ovw0 : evlist->mmap0;
+}
diff --git a/tools/perf/lib/include/internal/evlist.h b/tools/perf/lib/include/internal/evlist.h
index be0b25a70730..513a85cb7bfe 100644
--- a/tools/perf/lib/include/internal/evlist.h
+++ b/tools/perf/lib/include/internal/evlist.h
@@ -25,6 +25,8 @@ struct perf_evlist {
struct hlist_head heads[PERF_EVLIST__HLIST_SIZE];
struct perf_mmap *mmap;
struct perf_mmap *mmap_ovw;
+ struct perf_mmap *mmap0;
+ struct perf_mmap *mmap_ovw0;
};
typedef void
diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
index b328332b6ccf..f5b4f902b453 100644
--- a/tools/perf/lib/include/internal/mmap.h
+++ b/tools/perf/lib/include/internal/mmap.h
@@ -33,6 +33,7 @@ struct perf_mmap {
u64 flush;
libperf_unmap_cb_t unmap_cb;
char event_copy[PERF_SAMPLE_MAX_SIZE] __aligned(8);
+ struct perf_mmap *next;
};
struct perf_mmap_param {
@@ -42,8 +43,8 @@ struct perf_mmap_param {
size_t perf_mmap__mmap_len(struct perf_mmap *map);
-void perf_mmap__init(struct perf_mmap *map, bool overwrite,
- libperf_unmap_cb_t unmap_cb);
+void perf_mmap__init(struct perf_mmap *map, struct perf_mmap *prev,
+ bool overwrite, libperf_unmap_cb_t unmap_cb);
int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
int fd, int cpu);
void perf_mmap__munmap(struct perf_mmap *map);
diff --git a/tools/perf/lib/include/perf/evlist.h b/tools/perf/lib/include/perf/evlist.h
index 16f526e74d13..8c4b3c28535e 100644
--- a/tools/perf/lib/include/perf/evlist.h
+++ b/tools/perf/lib/include/perf/evlist.h
@@ -3,6 +3,7 @@
#define __LIBPERF_EVLIST_H
#include <perf/core.h>
+#include <stdbool.h>
struct perf_evlist;
struct perf_evsel;
@@ -38,4 +39,12 @@ LIBPERF_API int perf_evlist__filter_pollfd(struct perf_evlist *evlist,
LIBPERF_API int perf_evlist__mmap(struct perf_evlist *evlist, int pages);
LIBPERF_API void perf_evlist__munmap(struct perf_evlist *evlist);
+LIBPERF_API struct perf_mmap *perf_evlist__next_mmap(struct perf_evlist *evlist,
+ struct perf_mmap *map,
+ bool overwrite);
+#define perf_evlist__for_each_mmap(evlist, pos, overwrite) \
+ for ((pos) = perf_evlist__next_mmap((evlist), NULL, overwrite); \
+ (pos) != NULL; \
+ (pos) = perf_evlist__next_mmap((evlist), (pos), overwrite))
+
#endif /* __LIBPERF_EVLIST_H */
diff --git a/tools/perf/lib/libperf.map b/tools/perf/lib/libperf.map
index 2184aba36c3f..8be02afc324b 100644
--- a/tools/perf/lib/libperf.map
+++ b/tools/perf/lib/libperf.map
@@ -43,6 +43,7 @@ LIBPERF_0.0.1 {
perf_evlist__mmap;
perf_evlist__munmap;
perf_evlist__filter_pollfd;
+ perf_evlist__next_mmap;
perf_mmap__consume;
perf_mmap__read_init;
perf_mmap__read_done;
diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
index fe9e1b095fd7..fe7e9ef8a68c 100644
--- a/tools/perf/lib/mmap.c
+++ b/tools/perf/lib/mmap.c
@@ -12,13 +12,15 @@
#include <internal/lib.h>
#include "internal.h"
-void perf_mmap__init(struct perf_mmap *map, bool overwrite,
- libperf_unmap_cb_t unmap_cb)
+void perf_mmap__init(struct perf_mmap *map, struct perf_mmap *prev,
+ bool overwrite, libperf_unmap_cb_t unmap_cb)
{
map->fd = -1;
map->overwrite = overwrite;
map->unmap_cb = unmap_cb;
refcount_set(&map->refcnt, 0);
+ if (prev)
+ prev->next = map;
}
size_t perf_mmap__mmap_len(struct perf_mmap *map)
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 4910ae711b13..469a5476ef1a 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -582,6 +582,8 @@ static struct mmap *evlist__alloc_mmap(struct evlist *evlist,
return NULL;
for (i = 0; i < evlist->core.nr_mmaps; i++) {
+ struct perf_mmap *prev = i ? &map[i - 1].core : NULL;
+
/*
* When the perf_mmap() call is made we grab one refcount, plus
* one extra to let perf_mmap__consume() get the last
@@ -591,7 +593,7 @@ static struct mmap *evlist__alloc_mmap(struct evlist *evlist,
* Each PERF_EVENT_IOC_SET_OUTPUT points to this mmap and
* thus does perf_mmap__get() on it.
*/
- perf_mmap__init(&map[i].core, overwrite, perf_mmap__unmap_cb);
+ perf_mmap__init(&map[i].core, prev, overwrite, perf_mmap__unmap_cb);
}
return map;
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 28/36] libperf: Move mmap allocation to perf_evlist__mmap_ops::get
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (26 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 27/36] libperf: Add perf_evlist__for_each_mmap function Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-07 12:53 ` [PATCH 29/36] libperf: Move mask setup to perf_evlist__mmap_ops function Jiri Olsa
` (7 subsequent siblings)
35 siblings, 0 replies; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: lkml, Ingo Molnar, Namhyung Kim, Alexander Shishkin,
Peter Zijlstra, Michael Petlan
Moving allocation of mmap array into perf_evlist__mmap_ops::get,
so we centralize the mmap allocation.
Moving also nr_mmap setup to perf_evlist__mmap_ops so it's
centralized and shared by both perf and libperf mmap code.
Link: http://lkml.kernel.org/n/tip-svp52oxqixph08fijuylugp7@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/lib/evlist.c | 42 ++++++++++++++++++++++++----------------
tools/perf/util/evlist.c | 24 +++++++++--------------
2 files changed, 34 insertions(+), 32 deletions(-)
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index 4e85d9bb92bf..61ed27526e08 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -338,10 +338,6 @@ static struct perf_mmap* perf_evlist__alloc_mmap(struct perf_evlist *evlist, boo
int i;
struct perf_mmap *map;
- evlist->nr_mmaps = perf_cpu_map__nr(evlist->cpus);
- if (perf_cpu_map__empty(evlist->cpus))
- evlist->nr_mmaps = perf_thread_map__nr(evlist->threads);
-
map = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap));
if (!map)
return NULL;
@@ -384,18 +380,22 @@ static void perf_evlist__set_sid_idx(struct perf_evlist *evlist,
static struct perf_mmap*
perf_evlist__mmap_cb_get(struct perf_evlist *evlist, bool overwrite, int idx)
{
- struct perf_mmap *map = &evlist->mmap[idx];
+ struct perf_mmap *maps;
- if (overwrite) {
- if (!evlist->mmap_ovw) {
- evlist->mmap_ovw = perf_evlist__alloc_mmap(evlist, true);
- if (!evlist->mmap_ovw)
- return NULL;
- }
- map = &evlist->mmap_ovw[idx];
+ maps = overwrite ? evlist->mmap_ovw : evlist->mmap;
+
+ if (!maps) {
+ maps = perf_evlist__alloc_mmap(evlist, overwrite);
+ if (!maps)
+ return NULL;
+
+ if (overwrite)
+ evlist->mmap_ovw = maps;
+ else
+ evlist->mmap = maps;
}
- return map;
+ return &maps[idx];
}
#define FD(e, x, y) (*(int *) xyarray__entry(e->fd, x, y))
@@ -556,6 +556,17 @@ mmap_per_cpu(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
return -1;
}
+static int perf_evlist__nr_mmaps(struct perf_evlist *evlist)
+{
+ int nr_mmaps;
+
+ nr_mmaps = perf_cpu_map__nr(evlist->cpus);
+ if (perf_cpu_map__empty(evlist->cpus))
+ nr_mmaps = perf_thread_map__nr(evlist->threads);
+
+ return nr_mmaps;
+}
+
int perf_evlist__mmap_ops(struct perf_evlist *evlist,
struct perf_evlist_mmap_ops *ops,
struct perf_mmap_param *mp)
@@ -567,10 +578,7 @@ int perf_evlist__mmap_ops(struct perf_evlist *evlist,
if (!ops || !ops->get || !ops->mmap)
return -EINVAL;
- if (!evlist->mmap)
- evlist->mmap = perf_evlist__alloc_mmap(evlist, false);
- if (!evlist->mmap)
- return -ENOMEM;
+ evlist->nr_mmaps = perf_evlist__nr_mmaps(evlist);
perf_evlist__for_each_entry(evlist, evsel) {
if ((evsel->attr.read_format & PERF_FORMAT_ID) &&
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 469a5476ef1a..b58ef3147163 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -574,9 +574,6 @@ static struct mmap *evlist__alloc_mmap(struct evlist *evlist,
int i;
struct mmap *map;
- evlist->core.nr_mmaps = perf_cpu_map__nr(evlist->core.cpus);
- if (perf_cpu_map__empty(evlist->core.cpus))
- evlist->core.nr_mmaps = perf_thread_map__nr(evlist->core.threads);
map = zalloc(evlist->core.nr_mmaps * sizeof(struct mmap));
if (!map)
return NULL;
@@ -614,19 +611,21 @@ static struct perf_mmap*
perf_evlist__mmap_cb_get(struct perf_evlist *_evlist, bool overwrite, int idx)
{
struct evlist *evlist = container_of(_evlist, struct evlist, core);
- struct mmap *maps = evlist->mmap;
+ struct mmap *maps;
- if (overwrite) {
- maps = evlist->overwrite_mmap;
+ maps = overwrite ? evlist->overwrite_mmap : evlist->mmap;
- if (!maps) {
- maps = evlist__alloc_mmap(evlist, true);
- if (!maps)
- return NULL;
+ if (!maps) {
+ maps = evlist__alloc_mmap(evlist, overwrite);
+ if (!maps)
+ return NULL;
+ if (overwrite) {
evlist->overwrite_mmap = maps;
if (evlist->bkw_mmap_state == BKW_MMAP_NOTREADY)
perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING);
+ } else {
+ evlist->mmap = maps;
}
}
@@ -787,11 +786,6 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
.mmap = perf_evlist__mmap_cb_mmap,
};
- if (!evlist->mmap)
- evlist->mmap = evlist__alloc_mmap(evlist, false);
- if (!evlist->mmap)
- return -ENOMEM;
-
evlist->core.mmap_len = evlist__mmap_size(pages);
pr_debug("mmap size %zuB\n", evlist->core.mmap_len);
mp.core.mask = evlist->core.mmap_len - page_size - 1;
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 29/36] libperf: Move mask setup to perf_evlist__mmap_ops function
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (27 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 28/36] libperf: Move mmap allocation to perf_evlist__mmap_ops::get Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-07 12:53 ` [PATCH 30/36] libperf: Link static tests with libapi.a Jiri Olsa
` (6 subsequent siblings)
35 siblings, 0 replies; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: lkml, Ingo Molnar, Namhyung Kim, Alexander Shishkin,
Peter Zijlstra, Michael Petlan
Moving mask setup to perf_evlist__mmap_ops function,
because it's same on both perf and libperf path.
Link: http://lkml.kernel.org/n/tip-z31pepohuxlgecf6400wbvt0@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/lib/evlist.c | 3 ++-
tools/perf/util/evlist.c | 1 -
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index 61ed27526e08..8163b5123c55 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -578,6 +578,8 @@ int perf_evlist__mmap_ops(struct perf_evlist *evlist,
if (!ops || !ops->get || !ops->mmap)
return -EINVAL;
+ mp->mask = evlist->mmap_len - page_size - 1;
+
evlist->nr_mmaps = perf_evlist__nr_mmaps(evlist);
perf_evlist__for_each_entry(evlist, evsel) {
@@ -605,7 +607,6 @@ int perf_evlist__mmap(struct perf_evlist *evlist, int pages)
};
evlist->mmap_len = (pages + 1) * page_size;
- mp.mask = evlist->mmap_len - page_size - 1;
return perf_evlist__mmap_ops(evlist, &ops, &mp);
}
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index b58ef3147163..78185f984f0e 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -788,7 +788,6 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
evlist->core.mmap_len = evlist__mmap_size(pages);
pr_debug("mmap size %zuB\n", evlist->core.mmap_len);
- mp.core.mask = evlist->core.mmap_len - page_size - 1;
auxtrace_mmap_params__init(&mp.auxtrace_mp, evlist->core.mmap_len,
auxtrace_pages, auxtrace_overwrite);
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 30/36] libperf: Link static tests with libapi.a
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (28 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 29/36] libperf: Move mask setup to perf_evlist__mmap_ops function Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-07 12:53 ` [PATCH 31/36] libperf: Add _GNU_SOURCE define to compilation Jiri Olsa
` (5 subsequent siblings)
35 siblings, 0 replies; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: lkml, Ingo Molnar, Namhyung Kim, Alexander Shishkin,
Peter Zijlstra, Michael Petlan
Both static and dynamic tests needs to link libapi.a,
because it's using its functions. Adding also include
path for libapi includes.
Link: http://lkml.kernel.org/n/tip-ws9g47hh5vnkvdwpn93mtr3f@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/lib/Makefile | 1 +
tools/perf/lib/tests/Makefile | 6 +++---
2 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/tools/perf/lib/Makefile b/tools/perf/lib/Makefile
index 0889c9c3ec19..0f233638ef1f 100644
--- a/tools/perf/lib/Makefile
+++ b/tools/perf/lib/Makefile
@@ -107,6 +107,7 @@ else
endif
LIBAPI = $(API_PATH)libapi.a
+export LIBAPI
$(LIBAPI): FORCE
$(Q)$(MAKE) -C $(LIB_DIR) O=$(OUTPUT) $(OUTPUT)libapi.a
diff --git a/tools/perf/lib/tests/Makefile b/tools/perf/lib/tests/Makefile
index 1ee4e9ba848b..a43cd08c5c03 100644
--- a/tools/perf/lib/tests/Makefile
+++ b/tools/perf/lib/tests/Makefile
@@ -16,13 +16,13 @@ all:
include $(srctree)/tools/scripts/Makefile.include
-INCLUDE = -I$(srctree)/tools/perf/lib/include -I$(srctree)/tools/include
+INCLUDE = -I$(srctree)/tools/perf/lib/include -I$(srctree)/tools/include -I$(srctree)/tools/lib
$(TESTS_A): FORCE
- $(QUIET_LINK)$(CC) $(INCLUDE) $(CFLAGS) -o $@ $(subst -a,.c,$@) ../libperf.a
+ $(QUIET_LINK)$(CC) $(INCLUDE) $(CFLAGS) -o $@ $(subst -a,.c,$@) ../libperf.a $(LIBAPI)
$(TESTS_SO): FORCE
- $(QUIET_LINK)$(CC) $(INCLUDE) $(CFLAGS) -L.. -o $@ $(subst -so,.c,$@) -lperf
+ $(QUIET_LINK)$(CC) $(INCLUDE) $(CFLAGS) -L.. -o $@ $(subst -so,.c,$@) $(LIBAPI) -lperf
all: $(TESTS_A) $(TESTS_SO)
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 31/36] libperf: Add _GNU_SOURCE define to compilation
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (29 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 30/36] libperf: Link static tests with libapi.a Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-07 12:53 ` [PATCH 32/36] libperf: Add tests_mmap_thread test Jiri Olsa
` (4 subsequent siblings)
35 siblings, 0 replies; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: lkml, Ingo Molnar, Namhyung Kim, Alexander Shishkin,
Peter Zijlstra, Michael Petlan
Link: http://lkml.kernel.org/n/tip-m7t1e9kgea4jc3piyvjju7ps@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/lib/Makefile | 1 +
tools/perf/lib/tests/Makefile | 2 ++
2 files changed, 3 insertions(+)
diff --git a/tools/perf/lib/Makefile b/tools/perf/lib/Makefile
index 0f233638ef1f..20396f68fcad 100644
--- a/tools/perf/lib/Makefile
+++ b/tools/perf/lib/Makefile
@@ -73,6 +73,7 @@ override CFLAGS += -Werror -Wall
override CFLAGS += -fPIC
override CFLAGS += $(INCLUDES)
override CFLAGS += -fvisibility=hidden
+override CFLAGS += -D_GNU_SOURCE
all:
diff --git a/tools/perf/lib/tests/Makefile b/tools/perf/lib/tests/Makefile
index a43cd08c5c03..78c3d8c83c53 100644
--- a/tools/perf/lib/tests/Makefile
+++ b/tools/perf/lib/tests/Makefile
@@ -12,6 +12,8 @@ else
CFLAGS := -g -Wall
endif
+CFLAGS += -D_GNU_SOURCE
+
all:
include $(srctree)/tools/scripts/Makefile.include
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 32/36] libperf: Add tests_mmap_thread test
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (30 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 31/36] libperf: Add _GNU_SOURCE define to compilation Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-07 12:53 ` [PATCH 33/36] libperf: Add tests_mmap_cpus test Jiri Olsa
` (3 subsequent siblings)
35 siblings, 0 replies; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: lkml, Ingo Molnar, Namhyung Kim, Alexander Shishkin,
Peter Zijlstra, Michael Petlan
Adding mmaping tests that generates 100 prctl calls
in monitored child process and validates it gets
100 events in ring buffer.
Link: http://lkml.kernel.org/n/tip-5qzuxnmde9x6uojkysp3rldn@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/lib/tests/test-evlist.c | 119 +++++++++++++++++++++++++++++
1 file changed, 119 insertions(+)
diff --git a/tools/perf/lib/tests/test-evlist.c b/tools/perf/lib/tests/test-evlist.c
index e6b2ab2e2bde..90a1869ba4b1 100644
--- a/tools/perf/lib/tests/test-evlist.c
+++ b/tools/perf/lib/tests/test-evlist.c
@@ -1,12 +1,21 @@
// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include <stdarg.h>
+#include <unistd.h>
+#include <stdlib.h>
#include <linux/perf_event.h>
+#include <linux/limits.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/prctl.h>
#include <perf/cpumap.h>
#include <perf/threadmap.h>
#include <perf/evlist.h>
#include <perf/evsel.h>
+#include <perf/mmap.h>
+#include <perf/event.h>
#include <internal/tests.h>
+#include <api/fs/fs.h>
static int libperf_print(enum libperf_print_level level,
const char *fmt, va_list ap)
@@ -181,6 +190,115 @@ static int test_stat_thread_enable(void)
return 0;
}
+static int test_mmap_thread(void)
+{
+ struct perf_evlist *evlist;
+ struct perf_evsel *evsel;
+ struct perf_mmap *map;
+ struct perf_cpu_map *cpus;
+ struct perf_thread_map *threads;
+ struct perf_event_attr attr = {
+ .type = PERF_TYPE_TRACEPOINT,
+ .sample_period = 1,
+ .wakeup_watermark = 1,
+ .disabled = 1,
+ };
+ char path[PATH_MAX];
+ int id, err, pid, go_pipe[2];
+ union perf_event *event;
+ char bf;
+ int count = 0;
+
+ snprintf(path, PATH_MAX, "%s/kernel/debug/tracing/events/syscalls/sys_enter_prctl/id",
+ sysfs__mountpoint());
+
+ if (filename__read_int(path, &id)) {
+ fprintf(stderr, "error: failed to get tracepoint id: %s\n", path);
+ return -1;
+ }
+
+ attr.config = id;
+
+ err = pipe(go_pipe);
+ __T("failed to create pipe", err == 0);
+
+ fflush(NULL);
+
+ pid = fork();
+ if (!pid) {
+ int i;
+
+ read(go_pipe[0], &bf, 1);
+
+ /* Generate 100 prctl calls. */
+ for (i = 0; i < 100; i++)
+ prctl(0, 0, 0, 0, 0);
+
+ exit(0);
+ }
+
+ threads = perf_thread_map__new_dummy();
+ __T("failed to create threads", threads);
+
+ cpus = perf_cpu_map__dummy_new();
+ __T("failed to create cpus", cpus);
+
+ perf_thread_map__set_pid(threads, 0, pid);
+
+ evlist = perf_evlist__new();
+ __T("failed to create evlist", evlist);
+
+ evsel = perf_evsel__new(&attr);
+ __T("failed to create evsel1", evsel);
+
+ perf_evlist__add(evlist, evsel);
+
+ perf_evlist__set_maps(evlist, cpus, threads);
+
+ err = perf_evlist__open(evlist);
+ __T("failed to open evlist", err == 0);
+
+ err = perf_evlist__mmap(evlist, 4);
+ __T("failed to mmap evlist", err == 0);
+
+ perf_evlist__enable(evlist);
+
+ /* kick the child and wait for it to finish */
+ write(go_pipe[1], &bf, 1);
+ waitpid(pid, NULL, 0);
+
+ /*
+ * There's no need to call perf_evlist__disable,
+ * monitored process is dead now.
+ */
+
+ perf_evlist__for_each_mmap(evlist, map, false) {
+ if (perf_mmap__read_init(map) < 0)
+ continue;
+
+ while ((event = perf_mmap__read_event(map)) != NULL) {
+ count++;
+ perf_mmap__consume(map);
+ }
+
+ perf_mmap__read_done(map);
+ }
+
+ /* calls perf_evlist__munmap/perf_evlist__close */
+ perf_evlist__delete(evlist);
+
+ perf_thread_map__put(threads);
+ perf_cpu_map__put(cpus);
+
+ /*
+ * The generated prctl calls should match the
+ * number of events in the buffer.
+ */
+ __T("failed count", count == 100);
+
+ return 0;
+}
+
int main(int argc, char **argv)
{
__T_START;
@@ -190,6 +308,7 @@ int main(int argc, char **argv)
test_stat_cpu();
test_stat_thread();
test_stat_thread_enable();
+ test_mmap_thread();
__T_OK;
return 0;
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 33/36] libperf: Add tests_mmap_cpus test
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (31 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 32/36] libperf: Add tests_mmap_thread test Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-07 12:53 ` [PATCH 34/36] libperf: Keep count of failed tests Jiri Olsa
` (2 subsequent siblings)
35 siblings, 0 replies; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: lkml, Ingo Molnar, Namhyung Kim, Alexander Shishkin,
Peter Zijlstra, Michael Petlan
Adding mmaping tests that generates prctl call on
every cpu validates it gets all the related events
in ring buffer.
Link: http://lkml.kernel.org/n/tip-9qdckblmgjm42ofd7haflso0@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/lib/tests/test-evlist.c | 97 ++++++++++++++++++++++++++++++
1 file changed, 97 insertions(+)
diff --git a/tools/perf/lib/tests/test-evlist.c b/tools/perf/lib/tests/test-evlist.c
index 90a1869ba4b1..d8c52ebfa53a 100644
--- a/tools/perf/lib/tests/test-evlist.c
+++ b/tools/perf/lib/tests/test-evlist.c
@@ -1,5 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
+#include <sched.h>
#include <stdarg.h>
#include <unistd.h>
#include <stdlib.h>
@@ -299,6 +300,101 @@ static int test_mmap_thread(void)
return 0;
}
+static int test_mmap_cpus(void)
+{
+ struct perf_evlist *evlist;
+ struct perf_evsel *evsel;
+ struct perf_mmap *map;
+ struct perf_cpu_map *cpus;
+ struct perf_event_attr attr = {
+ .type = PERF_TYPE_TRACEPOINT,
+ .sample_period = 1,
+ .wakeup_watermark = 1,
+ .disabled = 1,
+ };
+ cpu_set_t saved_mask;
+ char path[PATH_MAX];
+ int id, err, cpu, tmp;
+ union perf_event *event;
+ int count = 0;
+
+ snprintf(path, PATH_MAX, "%s/kernel/debug/tracing/events/syscalls/sys_enter_prctl/id",
+ sysfs__mountpoint());
+
+ if (filename__read_int(path, &id)) {
+ fprintf(stderr, "error: failed to get tracepoint id: %s\n", path);
+ return -1;
+ }
+
+ attr.config = id;
+
+ cpus = perf_cpu_map__new(NULL);
+ __T("failed to create cpus", cpus);
+
+ evlist = perf_evlist__new();
+ __T("failed to create evlist", evlist);
+
+ evsel = perf_evsel__new(&attr);
+ __T("failed to create evsel1", evsel);
+
+ perf_evlist__add(evlist, evsel);
+
+ perf_evlist__set_maps(evlist, cpus, NULL);
+
+ err = perf_evlist__open(evlist);
+ __T("failed to open evlist", err == 0);
+
+ err = perf_evlist__mmap(evlist, 4);
+ __T("failed to mmap evlist", err == 0);
+
+ perf_evlist__enable(evlist);
+
+ err = sched_getaffinity(0, sizeof(saved_mask), &saved_mask);
+ __T("sched_getaffinity failed", err == 0);
+
+ perf_cpu_map__for_each_cpu(cpu, tmp, cpus) {
+ cpu_set_t mask;
+
+ CPU_ZERO(&mask);
+ CPU_SET(cpu, &mask);
+
+ err = sched_setaffinity(0, sizeof(mask), &mask);
+ __T("sched_setaffinity failed", err == 0);
+
+ prctl(0, 0, 0, 0, 0);
+ }
+
+ err = sched_setaffinity(0, sizeof(saved_mask), &saved_mask);
+ __T("sched_setaffinity failed", err == 0);
+
+ perf_evlist__disable(evlist);
+
+ perf_evlist__for_each_mmap(evlist, map, false) {
+ if (perf_mmap__read_init(map) < 0)
+ continue;
+
+ while ((event = perf_mmap__read_event(map)) != NULL) {
+ count++;
+ perf_mmap__consume(map);
+ }
+
+ perf_mmap__read_done(map);
+ }
+
+ /* calls perf_evlist__munmap/perf_evlist__close */
+ perf_evlist__delete(evlist);
+
+ /*
+ * The generated prctl events should match the
+ * number of cpus or be bigger (we are system-wide).
+ */
+ __T("failed count", count >= perf_cpu_map__nr(cpus));
+
+ perf_cpu_map__put(cpus);
+
+ return 0;
+}
+
int main(int argc, char **argv)
{
__T_START;
@@ -309,6 +405,7 @@ int main(int argc, char **argv)
test_stat_thread();
test_stat_thread_enable();
test_mmap_thread();
+ test_mmap_cpus();
__T_OK;
return 0;
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 34/36] libperf: Keep count of failed tests
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (32 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 33/36] libperf: Add tests_mmap_cpus test Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-07 12:53 ` [PATCH 35/36] libperf: Do not export perf_evsel__init/perf_evlist__init Jiri Olsa
2019-10-07 12:53 ` [PATCH 36/36] libperf: Add pr_err macro Jiri Olsa
35 siblings, 0 replies; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: lkml, Ingo Molnar, Namhyung Kim, Alexander Shishkin,
Peter Zijlstra, Michael Petlan
Keeping the count of failed tests, so we
get better output with failures, like:
# make tests
...
running static:
- running test-cpumap.c...OK
- running test-threadmap.c...OK
- running test-evlist.c...FAILED test-evlist.c:53 failed to create evsel2
FAILED test-evlist.c:163 failed to create evsel2
FAILED test-evlist.c:287 failed count
FAILED (3)
- running test-evsel.c...OK
running dynamic:
- running test-cpumap.c...OK
- running test-threadmap.c...OK
- running test-evlist.c...FAILED test-evlist.c:53 failed to create evsel2
FAILED test-evlist.c:163 failed to create evsel2
FAILED test-evlist.c:287 failed count
FAILED (3)
- running test-evsel.c...OK
...
Link: http://lkml.kernel.org/n/tip-wi78jndi8ymzw7dq11mwxsld@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/lib/include/internal/tests.h | 20 +++++++++++++++++---
tools/perf/lib/tests/test-cpumap.c | 2 +-
tools/perf/lib/tests/test-evlist.c | 2 +-
tools/perf/lib/tests/test-evsel.c | 2 +-
tools/perf/lib/tests/test-threadmap.c | 2 +-
5 files changed, 21 insertions(+), 7 deletions(-)
diff --git a/tools/perf/lib/include/internal/tests.h b/tools/perf/lib/include/internal/tests.h
index b7a20cd24ee1..2093e8868a67 100644
--- a/tools/perf/lib/include/internal/tests.h
+++ b/tools/perf/lib/include/internal/tests.h
@@ -4,14 +4,28 @@
#include <stdio.h>
-#define __T_START fprintf(stdout, "- running %s...", __FILE__)
-#define __T_OK fprintf(stdout, "OK\n")
-#define __T_FAIL fprintf(stdout, "FAIL\n")
+int tests_failed;
+
+#define __T_START \
+do { \
+ fprintf(stdout, "- running %s...", __FILE__); \
+ fflush(NULL); \
+ tests_failed = 0; \
+} while (0)
+
+#define __T_END \
+do { \
+ if (tests_failed) \
+ fprintf(stdout, " FAILED (%d)\n", tests_failed); \
+ else \
+ fprintf(stdout, "OK\n"); \
+} while (0)
#define __T(text, cond) \
do { \
if (!(cond)) { \
fprintf(stderr, "FAILED %s:%d %s\n", __FILE__, __LINE__, text); \
+ tests_failed++; \
return -1; \
} \
} while (0)
diff --git a/tools/perf/lib/tests/test-cpumap.c b/tools/perf/lib/tests/test-cpumap.c
index aa34c20df07e..c8d45091e7c2 100644
--- a/tools/perf/lib/tests/test-cpumap.c
+++ b/tools/perf/lib/tests/test-cpumap.c
@@ -26,6 +26,6 @@ int main(int argc, char **argv)
perf_cpu_map__put(cpus);
perf_cpu_map__put(cpus);
- __T_OK;
+ __T_END;
return 0;
}
diff --git a/tools/perf/lib/tests/test-evlist.c b/tools/perf/lib/tests/test-evlist.c
index d8c52ebfa53a..9a80c310ac0f 100644
--- a/tools/perf/lib/tests/test-evlist.c
+++ b/tools/perf/lib/tests/test-evlist.c
@@ -407,6 +407,6 @@ int main(int argc, char **argv)
test_mmap_thread();
test_mmap_cpus();
- __T_OK;
+ __T_END;
return 0;
}
diff --git a/tools/perf/lib/tests/test-evsel.c b/tools/perf/lib/tests/test-evsel.c
index 1b6c4285ac2b..135722ac965b 100644
--- a/tools/perf/lib/tests/test-evsel.c
+++ b/tools/perf/lib/tests/test-evsel.c
@@ -130,6 +130,6 @@ int main(int argc, char **argv)
test_stat_thread();
test_stat_thread_enable();
- __T_OK;
+ __T_END;
return 0;
}
diff --git a/tools/perf/lib/tests/test-threadmap.c b/tools/perf/lib/tests/test-threadmap.c
index 8c5f47247d9e..7dc4d6fbedde 100644
--- a/tools/perf/lib/tests/test-threadmap.c
+++ b/tools/perf/lib/tests/test-threadmap.c
@@ -26,6 +26,6 @@ int main(int argc, char **argv)
perf_thread_map__put(threads);
perf_thread_map__put(threads);
- __T_OK;
+ __T_END;
return 0;
}
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 35/36] libperf: Do not export perf_evsel__init/perf_evlist__init
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (33 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 34/36] libperf: Keep count of failed tests Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
2019-10-07 12:53 ` [PATCH 36/36] libperf: Add pr_err macro Jiri Olsa
35 siblings, 0 replies; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: lkml, Ingo Molnar, Namhyung Kim, Alexander Shishkin,
Peter Zijlstra, Michael Petlan
There's no point to export perf_evsel__init/perf_evlist__init,
it's called from perf_evsel__new/perf_evlist__new respectively.
It's used only from perf where perf_evsel/perf_evlist is embedded
perf's evsel/evlist.
Link: http://lkml.kernel.org/n/tip-k0w3i2vqos0lvnadfm95a8fy@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/lib/include/internal/evlist.h | 1 +
tools/perf/lib/include/internal/evsel.h | 1 +
tools/perf/lib/include/perf/evlist.h | 1 -
tools/perf/lib/include/perf/evsel.h | 2 --
tools/perf/lib/libperf.map | 2 --
5 files changed, 2 insertions(+), 5 deletions(-)
diff --git a/tools/perf/lib/include/internal/evlist.h b/tools/perf/lib/include/internal/evlist.h
index 513a85cb7bfe..450dacdfc062 100644
--- a/tools/perf/lib/include/internal/evlist.h
+++ b/tools/perf/lib/include/internal/evlist.h
@@ -50,6 +50,7 @@ int perf_evlist__mmap_ops(struct perf_evlist *evlist,
struct perf_evlist_mmap_ops *ops,
struct perf_mmap_param *mp);
+void perf_evlist__init(struct perf_evlist *evlist);
void perf_evlist__exit(struct perf_evlist *evlist);
/**
diff --git a/tools/perf/lib/include/internal/evsel.h b/tools/perf/lib/include/internal/evsel.h
index a69b8299c36f..1ffd083b235e 100644
--- a/tools/perf/lib/include/internal/evsel.h
+++ b/tools/perf/lib/include/internal/evsel.h
@@ -50,6 +50,7 @@ struct perf_evsel {
bool system_wide;
};
+void perf_evsel__init(struct perf_evsel *evsel, struct perf_event_attr *attr);
int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
void perf_evsel__close_fd(struct perf_evsel *evsel);
void perf_evsel__free_fd(struct perf_evsel *evsel);
diff --git a/tools/perf/lib/include/perf/evlist.h b/tools/perf/lib/include/perf/evlist.h
index 8c4b3c28535e..0a7479dc13bf 100644
--- a/tools/perf/lib/include/perf/evlist.h
+++ b/tools/perf/lib/include/perf/evlist.h
@@ -10,7 +10,6 @@ struct perf_evsel;
struct perf_cpu_map;
struct perf_thread_map;
-LIBPERF_API void perf_evlist__init(struct perf_evlist *evlist);
LIBPERF_API void perf_evlist__add(struct perf_evlist *evlist,
struct perf_evsel *evsel);
LIBPERF_API void perf_evlist__remove(struct perf_evlist *evlist,
diff --git a/tools/perf/lib/include/perf/evsel.h b/tools/perf/lib/include/perf/evsel.h
index 4388667f265c..557f5815a9c9 100644
--- a/tools/perf/lib/include/perf/evsel.h
+++ b/tools/perf/lib/include/perf/evsel.h
@@ -21,8 +21,6 @@ struct perf_counts_values {
};
};
-LIBPERF_API void perf_evsel__init(struct perf_evsel *evsel,
- struct perf_event_attr *attr);
LIBPERF_API struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr);
LIBPERF_API void perf_evsel__delete(struct perf_evsel *evsel);
LIBPERF_API int perf_evsel__open(struct perf_evsel *evsel, struct perf_cpu_map *cpus,
diff --git a/tools/perf/lib/libperf.map b/tools/perf/lib/libperf.map
index 8be02afc324b..7be1af8a546c 100644
--- a/tools/perf/lib/libperf.map
+++ b/tools/perf/lib/libperf.map
@@ -21,7 +21,6 @@ LIBPERF_0.0.1 {
perf_evsel__delete;
perf_evsel__enable;
perf_evsel__disable;
- perf_evsel__init;
perf_evsel__open;
perf_evsel__close;
perf_evsel__read;
@@ -34,7 +33,6 @@ LIBPERF_0.0.1 {
perf_evlist__close;
perf_evlist__enable;
perf_evlist__disable;
- perf_evlist__init;
perf_evlist__add;
perf_evlist__remove;
perf_evlist__next;
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [PATCH 36/36] libperf: Add pr_err macro
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
` (34 preceding siblings ...)
2019-10-07 12:53 ` [PATCH 35/36] libperf: Do not export perf_evsel__init/perf_evlist__init Jiri Olsa
@ 2019-10-07 12:53 ` Jiri Olsa
35 siblings, 0 replies; 69+ messages in thread
From: Jiri Olsa @ 2019-10-07 12:53 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: lkml, Ingo Molnar, Namhyung Kim, Alexander Shishkin,
Peter Zijlstra, Michael Petlan
And missing include for "perf/core.h" header, which provides
LIBPERF_* debug levels and adding missing pr_err support.
Link: http://lkml.kernel.org/n/tip-sgq5yeyvitp655s2iq3e75ls@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/lib/include/perf/core.h | 1 +
tools/perf/lib/internal.h | 3 +++
2 files changed, 4 insertions(+)
diff --git a/tools/perf/lib/include/perf/core.h b/tools/perf/lib/include/perf/core.h
index 2a80e4b6f819..a3f6d68edad7 100644
--- a/tools/perf/lib/include/perf/core.h
+++ b/tools/perf/lib/include/perf/core.h
@@ -9,6 +9,7 @@
#endif
enum libperf_print_level {
+ LIBPERF_ERR,
LIBPERF_WARN,
LIBPERF_INFO,
LIBPERF_DEBUG,
diff --git a/tools/perf/lib/internal.h b/tools/perf/lib/internal.h
index 37db745e1502..2c27e158de6b 100644
--- a/tools/perf/lib/internal.h
+++ b/tools/perf/lib/internal.h
@@ -2,6 +2,8 @@
#ifndef __LIBPERF_INTERNAL_H
#define __LIBPERF_INTERNAL_H
+#include <perf/core.h>
+
void libperf_print(enum libperf_print_level level,
const char *format, ...)
__attribute__((format(printf, 2, 3)));
@@ -11,6 +13,7 @@ do { \
libperf_print(level, "libperf: " fmt, ##__VA_ARGS__); \
} while (0)
+#define pr_err(fmt, ...) __pr(LIBPERF_ERR, fmt, ##__VA_ARGS__)
#define pr_warning(fmt, ...) __pr(LIBPERF_WARN, fmt, ##__VA_ARGS__)
#define pr_info(fmt, ...) __pr(LIBPERF_INFO, fmt, ##__VA_ARGS__)
#define pr_debug(fmt, ...) __pr(LIBPERF_DEBUG, fmt, ##__VA_ARGS__)
--
2.21.0
^ permalink raw reply related [flat|nested] 69+ messages in thread
* Re: [PATCH 07/36] libperf: Add perf_mmap__put() function
2019-10-07 12:53 ` [PATCH 07/36] libperf: Add perf_mmap__put() function Jiri Olsa
@ 2019-10-10 13:11 ` Arnaldo Carvalho de Melo
2019-10-15 5:31 ` [tip: perf/core] libperf: Adopt perf_mmap__put() function from tools/perf tip-bot2 for Jiri Olsa
1 sibling, 0 replies; 69+ messages in thread
From: Arnaldo Carvalho de Melo @ 2019-10-10 13:11 UTC (permalink / raw)
To: Jiri Olsa
Cc: Alexander Shishkin, Michael Petlan, Namhyung Kim, Peter Zijlstra,
lkml, Ingo Molnar
Em Mon, Oct 07, 2019 at 02:53:15PM +0200, Jiri Olsa escreveu:
> +++ b/tools/perf/lib/mmap.c
> @@ -3,10 +3,12 @@
> #include <internal/mmap.h>
> #include <internal/lib.h>
>
> -void perf_mmap__init(struct perf_mmap *map, bool overwrite)
> +void perf_mmap__init(struct perf_mmap *map, bool overwrite,
> + libperf_unmap_cb_t unmap_cb)
> {
> map->fd = -1;
> map->overwrite = overwrite;
> + map->unmap_cb = unmap_cb;
> refcount_set(&map->refcnt, 0);
> }
>
> @@ -40,9 +42,19 @@ void perf_mmap__munmap(struct perf_mmap *map)
> map->fd = -1;
> refcount_set(&map->refcnt, 0);
> }
> + if (map && map->unmap_cb)
> + map->unmap_cb(map);
> }
>
> void perf_mmap__get(struct perf_mmap *map)
> {
> refcount_inc(&map->refcnt);
> }
> +
> +void perf_mmap__put(struct perf_mmap *map)
> +{
> + BUG_ON(map->base && refcount_read(&map->refcnt) == 0);
Added missing linux/kernel.h to this file to pick up BUG_ON().
- Arnaldo
^ permalink raw reply [flat|nested] 69+ messages in thread
* Re: [PATCH 12/36] libperf: Add perf_mmap__read_event() function
2019-10-07 12:53 ` [PATCH 12/36] libperf: Add perf_mmap__read_event() function Jiri Olsa
@ 2019-10-10 14:47 ` Arnaldo Carvalho de Melo
2019-10-10 15:32 ` Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Adopt perf_mmap__read_event() from tools/perf tip-bot2 for Jiri Olsa
1 sibling, 1 reply; 69+ messages in thread
From: Arnaldo Carvalho de Melo @ 2019-10-10 14:47 UTC (permalink / raw)
To: Jiri Olsa
Cc: Alexander Shishkin, Michael Petlan, Namhyung Kim, Peter Zijlstra,
lkml, Ingo Molnar
Em Mon, Oct 07, 2019 at 02:53:20PM +0200, Jiri Olsa escreveu:
> Move perf_mmap__read_event() from tools/perf to libperf and export it in
> the perf/mmap.h header.
>
> Signed-off-by: Jiri Olsa <jolsa@kernel.org>
> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
> Cc: Michael Petlan <mpetlan@redhat.com>
> Cc: Namhyung Kim <namhyung@kernel.org>
> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
> Link: http://lore.kernel.org/lkml/20190913132355.21634-52-jolsa@kernel.org
> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
> ---
> tools/perf/arch/x86/tests/perf-time-to-tsc.c | 2 +-
> tools/perf/builtin-kvm.c | 2 +-
> tools/perf/builtin-top.c | 2 +-
> tools/perf/builtin-trace.c | 2 +-
> tools/perf/lib/include/internal/mmap.h | 1 +
> tools/perf/lib/include/perf/mmap.h | 1 +
> tools/perf/lib/libperf.map | 1 +
> tools/perf/lib/mmap.c | 79 ++++++++++++++++++++
> tools/perf/tests/backward-ring-buffer.c | 2 +-
> tools/perf/tests/bpf.c | 2 +-
> tools/perf/tests/code-reading.c | 2 +-
> tools/perf/tests/keep-tracking.c | 2 +-
> tools/perf/tests/mmap-basic.c | 2 +-
> tools/perf/tests/openat-syscall-tp-fields.c | 2 +-
> tools/perf/tests/perf-record.c | 2 +-
> tools/perf/tests/sw-clock.c | 2 +-
> tools/perf/tests/switch-tracking.c | 2 +-
> tools/perf/tests/task-exit.c | 2 +-
> tools/perf/util/evlist.c | 2 +-
> tools/perf/util/mmap.c | 77 -------------------
> tools/perf/util/mmap.h | 2 -
> tools/perf/util/python.c | 2 +-
> 22 files changed, 98 insertions(+), 95 deletions(-)
>
> diff --git a/tools/perf/arch/x86/tests/perf-time-to-tsc.c b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
> index c90d925f7ae6..909ead08a6f6 100644
> --- a/tools/perf/arch/x86/tests/perf-time-to-tsc.c
> +++ b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
> @@ -121,7 +121,7 @@ int test__perf_time_to_tsc(struct test *test __maybe_unused, int subtest __maybe
> if (perf_mmap__read_init(&md->core) < 0)
> continue;
>
> - while ((event = perf_mmap__read_event(md)) != NULL) {
> + while ((event = perf_mmap__read_event(&md->core)) != NULL) {
> struct perf_sample sample;
>
> if (event->header.type != PERF_RECORD_COMM ||
> diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
> index 4c087a8c9fed..858da896b518 100644
> --- a/tools/perf/builtin-kvm.c
> +++ b/tools/perf/builtin-kvm.c
> @@ -764,7 +764,7 @@ static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
> if (err < 0)
> return (err == -EAGAIN) ? 0 : -1;
>
> - while ((event = perf_mmap__read_event(md)) != NULL) {
> + while ((event = perf_mmap__read_event(&md->core)) != NULL) {
> err = perf_evlist__parse_sample_timestamp(evlist, event, ×tamp);
> if (err) {
> perf_mmap__consume(&md->core);
> diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
> index 1a54069ccd9c..d96f24c8770d 100644
> --- a/tools/perf/builtin-top.c
> +++ b/tools/perf/builtin-top.c
> @@ -873,7 +873,7 @@ static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
> if (perf_mmap__read_init(&md->core) < 0)
> return;
>
> - while ((event = perf_mmap__read_event(md)) != NULL) {
> + while ((event = perf_mmap__read_event(&md->core)) != NULL) {
> int ret;
>
> ret = perf_evlist__parse_sample_timestamp(evlist, event, &last_timestamp);
> diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
> index 5fc3051a0938..2ae8298375a0 100644
> --- a/tools/perf/builtin-trace.c
> +++ b/tools/perf/builtin-trace.c
> @@ -3454,7 +3454,7 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
> if (perf_mmap__read_init(&md->core) < 0)
> continue;
>
> - while ((event = perf_mmap__read_event(md)) != NULL) {
> + while ((event = perf_mmap__read_event(&md->core)) != NULL) {
> ++trace->nr_events;
>
> err = trace__deliver_event(trace, event);
> diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
> index ee536c4441bb..b328332b6ccf 100644
> --- a/tools/perf/lib/include/internal/mmap.h
> +++ b/tools/perf/lib/include/internal/mmap.h
> @@ -11,6 +11,7 @@
> #define PERF_SAMPLE_MAX_SIZE (1 << 16)
>
> struct perf_mmap;
> +union perf_event;
Why are you adding this here?
> typedef void (*libperf_unmap_cb_t)(struct perf_mmap *map);
>
> diff --git a/tools/perf/lib/include/perf/mmap.h b/tools/perf/lib/include/perf/mmap.h
> index 4f946e7f724b..396c6543d95d 100644
> --- a/tools/perf/lib/include/perf/mmap.h
> +++ b/tools/perf/lib/include/perf/mmap.h
> @@ -9,5 +9,6 @@ struct perf_mmap;
> LIBPERF_API void perf_mmap__consume(struct perf_mmap *map);
> LIBPERF_API int perf_mmap__read_init(struct perf_mmap *map);
> LIBPERF_API void perf_mmap__read_done(struct perf_mmap *map);
> +LIBPERF_API union perf_event *perf_mmap__read_event(struct perf_mmap *map);
>
> #endif /* __LIBPERF_MMAP_H */
> diff --git a/tools/perf/lib/libperf.map b/tools/perf/lib/libperf.map
> index 7e3ea2e9c917..8bb0d73e0c6c 100644
> --- a/tools/perf/lib/libperf.map
> +++ b/tools/perf/lib/libperf.map
> @@ -43,6 +43,7 @@ LIBPERF_0.0.1 {
> perf_mmap__consume;
> perf_mmap__read_init;
> perf_mmap__read_done;
> + perf_mmap__read_event;
> local:
> *;
> };
> diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
> index 7d39289a4a22..fe9e1b095fd7 100644
> --- a/tools/perf/lib/mmap.c
> +++ b/tools/perf/lib/mmap.c
> @@ -3,9 +3,11 @@
> #include <inttypes.h>
> #include <asm/bug.h>
> #include <errno.h>
> +#include <string.h>
> #include <linux/ring_buffer.h>
> #include <linux/perf_event.h>
> #include <perf/mmap.h>
> +#include <perf/event.h>
> #include <internal/mmap.h>
> #include <internal/lib.h>
> #include "internal.h"
> @@ -191,3 +193,80 @@ void perf_mmap__read_done(struct perf_mmap *map)
>
> map->prev = perf_mmap__read_head(map);
> }
> +
> +/* When check_messup is true, 'end' must points to a good entry */
> +static union perf_event *perf_mmap__read(struct perf_mmap *map,
> + u64 *startp, u64 end)
> +{
> + unsigned char *data = map->base + page_size;
> + union perf_event *event = NULL;
> + int diff = end - *startp;
> +
> + if (diff >= (int)sizeof(event->header)) {
> + size_t size;
> +
> + event = (union perf_event *)&data[*startp & map->mask];
> + size = event->header.size;
> +
> + if (size < sizeof(event->header) || diff < (int)size)
> + return NULL;
> +
> + /*
> + * Event straddles the mmap boundary -- header should always
> + * be inside due to u64 alignment of output.
> + */
> + if ((*startp & map->mask) + size != ((*startp + size) & map->mask)) {
> + unsigned int offset = *startp;
> + unsigned int len = min(sizeof(*event), size), cpy;
> + void *dst = map->event_copy;
> +
> + do {
> + cpy = min(map->mask + 1 - (offset & map->mask), len);
> + memcpy(dst, &data[offset & map->mask], cpy);
> + offset += cpy;
> + dst += cpy;
> + len -= cpy;
> + } while (len);
> +
> + event = (union perf_event *)map->event_copy;
> + }
> +
> + *startp += size;
> + }
> +
> + return event;
> +}
> +
> +/*
> + * Read event from ring buffer one by one.
> + * Return one event for each call.
> + *
> + * Usage:
> + * perf_mmap__read_init()
> + * while(event = perf_mmap__read_event()) {
> + * //process the event
> + * perf_mmap__consume()
> + * }
> + * perf_mmap__read_done()
> + */
> +union perf_event *perf_mmap__read_event(struct perf_mmap *map)
> +{
> + union perf_event *event;
> +
> + /*
> + * Check if event was unmapped due to a POLLHUP/POLLERR.
> + */
> + if (!refcount_read(&map->refcnt))
> + return NULL;
> +
> + /* non-overwirte doesn't pause the ringbuffer */
> + if (!map->overwrite)
> + map->end = perf_mmap__read_head(map);
> +
> + event = perf_mmap__read(map, &map->start, map->end);
> +
> + if (!map->overwrite)
> + map->prev = map->start;
> +
> + return event;
> +}
> diff --git a/tools/perf/tests/backward-ring-buffer.c b/tools/perf/tests/backward-ring-buffer.c
> index 13e67cd213bd..a4cd30c0beb3 100644
> --- a/tools/perf/tests/backward-ring-buffer.c
> +++ b/tools/perf/tests/backward-ring-buffer.c
> @@ -39,7 +39,7 @@ static int count_samples(struct evlist *evlist, int *sample_count,
> union perf_event *event;
>
> perf_mmap__read_init(&map->core);
> - while ((event = perf_mmap__read_event(map)) != NULL) {
> + while ((event = perf_mmap__read_event(&map->core)) != NULL) {
> const u32 type = event->header.type;
>
> switch (type) {
> diff --git a/tools/perf/tests/bpf.c b/tools/perf/tests/bpf.c
> index fd45529e29c1..5d20bf8397f0 100644
> --- a/tools/perf/tests/bpf.c
> +++ b/tools/perf/tests/bpf.c
> @@ -188,7 +188,7 @@ static int do_test(struct bpf_object *obj, int (*func)(void),
> if (perf_mmap__read_init(&md->core) < 0)
> continue;
>
> - while ((event = perf_mmap__read_event(md)) != NULL) {
> + while ((event = perf_mmap__read_event(&md->core)) != NULL) {
> const u32 type = event->header.type;
>
> if (type == PERF_RECORD_SAMPLE)
> diff --git a/tools/perf/tests/code-reading.c b/tools/perf/tests/code-reading.c
> index 9947cda29bad..1f017e1b2a55 100644
> --- a/tools/perf/tests/code-reading.c
> +++ b/tools/perf/tests/code-reading.c
> @@ -429,7 +429,7 @@ static int process_events(struct machine *machine, struct evlist *evlist,
> if (perf_mmap__read_init(&md->core) < 0)
> continue;
>
> - while ((event = perf_mmap__read_event(md)) != NULL) {
> + while ((event = perf_mmap__read_event(&md->core)) != NULL) {
> ret = process_event(machine, evlist, event, state);
> perf_mmap__consume(&md->core);
> if (ret < 0)
> diff --git a/tools/perf/tests/keep-tracking.c b/tools/perf/tests/keep-tracking.c
> index e950907f6f57..50a0c9fcde7d 100644
> --- a/tools/perf/tests/keep-tracking.c
> +++ b/tools/perf/tests/keep-tracking.c
> @@ -41,7 +41,7 @@ static int find_comm(struct evlist *evlist, const char *comm)
> md = &evlist->mmap[i];
> if (perf_mmap__read_init(&md->core) < 0)
> continue;
> - while ((event = perf_mmap__read_event(md)) != NULL) {
> + while ((event = perf_mmap__read_event(&md->core)) != NULL) {
> if (event->header.type == PERF_RECORD_COMM &&
> (pid_t)event->comm.pid == getpid() &&
> (pid_t)event->comm.tid == getpid() &&
> diff --git a/tools/perf/tests/mmap-basic.c b/tools/perf/tests/mmap-basic.c
> index bb15d405a42c..5f4c0dbb4715 100644
> --- a/tools/perf/tests/mmap-basic.c
> +++ b/tools/perf/tests/mmap-basic.c
> @@ -117,7 +117,7 @@ int test__basic_mmap(struct test *test __maybe_unused, int subtest __maybe_unuse
> if (perf_mmap__read_init(&md->core) < 0)
> goto out_init;
>
> - while ((event = perf_mmap__read_event(md)) != NULL) {
> + while ((event = perf_mmap__read_event(&md->core)) != NULL) {
> struct perf_sample sample;
>
> if (event->header.type != PERF_RECORD_SAMPLE) {
> diff --git a/tools/perf/tests/openat-syscall-tp-fields.c b/tools/perf/tests/openat-syscall-tp-fields.c
> index c95eb1bbf396..c6b2d7aab608 100644
> --- a/tools/perf/tests/openat-syscall-tp-fields.c
> +++ b/tools/perf/tests/openat-syscall-tp-fields.c
> @@ -96,7 +96,7 @@ int test__syscall_openat_tp_fields(struct test *test __maybe_unused, int subtest
> if (perf_mmap__read_init(&md->core) < 0)
> continue;
>
> - while ((event = perf_mmap__read_event(md)) != NULL) {
> + while ((event = perf_mmap__read_event(&md->core)) != NULL) {
> const u32 type = event->header.type;
> int tp_flags;
> struct perf_sample sample;
> diff --git a/tools/perf/tests/perf-record.c b/tools/perf/tests/perf-record.c
> index 92a53be3b32b..2195fc205e72 100644
> --- a/tools/perf/tests/perf-record.c
> +++ b/tools/perf/tests/perf-record.c
> @@ -174,7 +174,7 @@ int test__PERF_RECORD(struct test *test __maybe_unused, int subtest __maybe_unus
> if (perf_mmap__read_init(&md->core) < 0)
> continue;
>
> - while ((event = perf_mmap__read_event(md)) != NULL) {
> + while ((event = perf_mmap__read_event(&md->core)) != NULL) {
> const u32 type = event->header.type;
> const char *name = perf_event__name(type);
>
> diff --git a/tools/perf/tests/sw-clock.c b/tools/perf/tests/sw-clock.c
> index ace20921ad55..bfb9986093d8 100644
> --- a/tools/perf/tests/sw-clock.c
> +++ b/tools/perf/tests/sw-clock.c
> @@ -103,7 +103,7 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id)
> if (perf_mmap__read_init(&md->core) < 0)
> goto out_init;
>
> - while ((event = perf_mmap__read_event(md)) != NULL) {
> + while ((event = perf_mmap__read_event(&md->core)) != NULL) {
> struct perf_sample sample;
>
> if (event->header.type != PERF_RECORD_SAMPLE)
> diff --git a/tools/perf/tests/switch-tracking.c b/tools/perf/tests/switch-tracking.c
> index 8400fb17c170..fcb0d03dba4e 100644
> --- a/tools/perf/tests/switch-tracking.c
> +++ b/tools/perf/tests/switch-tracking.c
> @@ -273,7 +273,7 @@ static int process_events(struct evlist *evlist,
> if (perf_mmap__read_init(&md->core) < 0)
> continue;
>
> - while ((event = perf_mmap__read_event(md)) != NULL) {
> + while ((event = perf_mmap__read_event(&md->core)) != NULL) {
> cnt += 1;
> ret = add_event(evlist, &events, event);
> perf_mmap__consume(&md->core);
> diff --git a/tools/perf/tests/task-exit.c b/tools/perf/tests/task-exit.c
> index c6a13948821c..4965f8b9055b 100644
> --- a/tools/perf/tests/task-exit.c
> +++ b/tools/perf/tests/task-exit.c
> @@ -121,7 +121,7 @@ int test__task_exit(struct test *test __maybe_unused, int subtest __maybe_unused
> if (perf_mmap__read_init(&md->core) < 0)
> goto out_init;
>
> - while ((event = perf_mmap__read_event(md)) != NULL) {
> + while ((event = perf_mmap__read_event(&md->core)) != NULL) {
> if (event->header.type == PERF_RECORD_EXIT)
> nr_exit++;
>
> diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
> index 830dc91994bc..09fe8fe9805d 100644
> --- a/tools/perf/util/evlist.c
> +++ b/tools/perf/util/evlist.c
> @@ -1742,7 +1742,7 @@ static void *perf_evlist__poll_thread(void *arg)
>
> if (perf_mmap__read_init(&map->core))
> continue;
> - while ((event = perf_mmap__read_event(map)) != NULL) {
> + while ((event = perf_mmap__read_event(&map->core)) != NULL) {
> struct evsel *evsel = perf_evlist__event2evsel(evlist, event);
>
> if (evsel && evsel->side_band.cb)
> diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
> index 2dedef9b06fd..2a8bf0ab861c 100644
> --- a/tools/perf/util/mmap.c
> +++ b/tools/perf/util/mmap.c
> @@ -29,83 +29,6 @@ size_t mmap__mmap_len(struct mmap *map)
> return perf_mmap__mmap_len(&map->core);
> }
>
> -/* When check_messup is true, 'end' must points to a good entry */
> -static union perf_event *perf_mmap__read(struct mmap *map,
> - u64 *startp, u64 end)
> -{
> - unsigned char *data = map->core.base + page_size;
> - union perf_event *event = NULL;
> - int diff = end - *startp;
> -
> - if (diff >= (int)sizeof(event->header)) {
> - size_t size;
> -
> - event = (union perf_event *)&data[*startp & map->core.mask];
> - size = event->header.size;
> -
> - if (size < sizeof(event->header) || diff < (int)size)
> - return NULL;
> -
> - /*
> - * Event straddles the mmap boundary -- header should always
> - * be inside due to u64 alignment of output.
> - */
> - if ((*startp & map->core.mask) + size != ((*startp + size) & map->core.mask)) {
> - unsigned int offset = *startp;
> - unsigned int len = min(sizeof(*event), size), cpy;
> - void *dst = map->core.event_copy;
> -
> - do {
> - cpy = min(map->core.mask + 1 - (offset & map->core.mask), len);
> - memcpy(dst, &data[offset & map->core.mask], cpy);
> - offset += cpy;
> - dst += cpy;
> - len -= cpy;
> - } while (len);
> -
> - event = (union perf_event *)map->core.event_copy;
> - }
> -
> - *startp += size;
> - }
> -
> - return event;
> -}
> -
> -/*
> - * Read event from ring buffer one by one.
> - * Return one event for each call.
> - *
> - * Usage:
> - * perf_mmap__read_init()
> - * while(event = perf_mmap__read_event()) {
> - * //process the event
> - * perf_mmap__consume()
> - * }
> - * perf_mmap__read_done()
> - */
> -union perf_event *perf_mmap__read_event(struct mmap *map)
> -{
> - union perf_event *event;
> -
> - /*
> - * Check if event was unmapped due to a POLLHUP/POLLERR.
> - */
> - if (!refcount_read(&map->core.refcnt))
> - return NULL;
> -
> - /* non-overwirte doesn't pause the ringbuffer */
> - if (!map->core.overwrite)
> - map->core.end = perf_mmap__read_head(&map->core);
> -
> - event = perf_mmap__read(map, &map->core.start, map->core.end);
> -
> - if (!map->core.overwrite)
> - map->core.prev = map->core.start;
> -
> - return event;
> -}
> -
> int __weak auxtrace_mmap__mmap(struct auxtrace_mmap *mm __maybe_unused,
> struct auxtrace_mmap_params *mp __maybe_unused,
> void *userpg __maybe_unused,
> diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
> index 0b15702be1a5..bee4e83f7109 100644
> --- a/tools/perf/util/mmap.h
> +++ b/tools/perf/util/mmap.h
> @@ -47,8 +47,6 @@ void mmap__munmap(struct mmap *map);
>
> union perf_event *perf_mmap__read_forward(struct mmap *map);
>
> -union perf_event *perf_mmap__read_event(struct mmap *map);
> -
> int perf_mmap__push(struct mmap *md, void *to,
> int push(struct mmap *map, void *to, void *buf, size_t size));
>
> diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
> index 7cb432899e7a..78345442cad9 100644
> --- a/tools/perf/util/python.c
> +++ b/tools/perf/util/python.c
> @@ -1020,7 +1020,7 @@ static PyObject *pyrf_evlist__read_on_cpu(struct pyrf_evlist *pevlist,
> if (perf_mmap__read_init(&md->core) < 0)
> goto end;
>
> - event = perf_mmap__read_event(md);
> + event = perf_mmap__read_event(&md->core);
> if (event != NULL) {
> PyObject *pyevent = pyrf_event__new(event);
> struct pyrf_event *pevent = (struct pyrf_event *)pyevent;
> --
> 2.21.0
--
- Arnaldo
^ permalink raw reply [flat|nested] 69+ messages in thread
* Re: [PATCH 12/36] libperf: Add perf_mmap__read_event() function
2019-10-10 14:47 ` Arnaldo Carvalho de Melo
@ 2019-10-10 15:32 ` Jiri Olsa
2019-10-10 16:07 ` Arnaldo Carvalho de Melo
0 siblings, 1 reply; 69+ messages in thread
From: Jiri Olsa @ 2019-10-10 15:32 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, lkml, Ingo Molnar
On Thu, Oct 10, 2019 at 11:47:00AM -0300, Arnaldo Carvalho de Melo wrote:
SNIP
> > diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
> > index ee536c4441bb..b328332b6ccf 100644
> > --- a/tools/perf/lib/include/internal/mmap.h
> > +++ b/tools/perf/lib/include/internal/mmap.h
> > @@ -11,6 +11,7 @@
> > #define PERF_SAMPLE_MAX_SIZE (1 << 16)
> >
> > struct perf_mmap;
> > +union perf_event;
>
> Why are you adding this here?
oops, it should be in lib/include/perf/mmap.h ;-)
plz let me know if you want me to repost
thanks,
jirka
^ permalink raw reply [flat|nested] 69+ messages in thread
* Re: [PATCH 27/36] libperf: Add perf_evlist__for_each_mmap function
2019-10-07 12:53 ` [PATCH 27/36] libperf: Add perf_evlist__for_each_mmap function Jiri Olsa
@ 2019-10-10 16:06 ` Arnaldo Carvalho de Melo
2019-10-10 16:20 ` Jiri Olsa
0 siblings, 1 reply; 69+ messages in thread
From: Arnaldo Carvalho de Melo @ 2019-10-10 16:06 UTC (permalink / raw)
To: Jiri Olsa
Cc: lkml, Ingo Molnar, Namhyung Kim, Alexander Shishkin,
Peter Zijlstra, Michael Petlan
Em Mon, Oct 07, 2019 at 02:53:35PM +0200, Jiri Olsa escreveu:
> Adding perf_evlist__for_each_mmap function and exporting
> it in perf/evlist.h header, so user can iterate through
> 'struct perf_mmap' objects.
>
> Adding internal perf_mmap__link function to do the actual
> linking.
>
> Link: http://lkml.kernel.org/n/tip-5h62ytvpxgozhqix2y41cvex@git.kernel.org
> Signed-off-by: Jiri Olsa <jolsa@kernel.org>
> ---
> tools/perf/lib/evlist.c | 26 +++++++++++++++++++++++-
> tools/perf/lib/include/internal/evlist.h | 2 ++
> tools/perf/lib/include/internal/mmap.h | 5 +++--
> tools/perf/lib/include/perf/evlist.h | 9 ++++++++
> tools/perf/lib/libperf.map | 1 +
> tools/perf/lib/mmap.c | 6 ++++--
> tools/perf/util/evlist.c | 4 +++-
> 7 files changed, 47 insertions(+), 6 deletions(-)
>
> diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
> index 65045614c938..4e85d9bb92bf 100644
> --- a/tools/perf/lib/evlist.c
> +++ b/tools/perf/lib/evlist.c
> @@ -347,6 +347,8 @@ static struct perf_mmap* perf_evlist__alloc_mmap(struct perf_evlist *evlist, boo
> return NULL;
>
> for (i = 0; i < evlist->nr_mmaps; i++) {
> + struct perf_mmap *prev = i ? &map[i - 1] : NULL;
> +
> /*
> * When the perf_mmap() call is made we grab one refcount, plus
> * one extra to let perf_mmap__consume() get the last
> @@ -356,7 +358,7 @@ static struct perf_mmap* perf_evlist__alloc_mmap(struct perf_evlist *evlist, boo
> * Each PERF_EVENT_IOC_SET_OUTPUT points to this mmap and
> * thus does perf_mmap__get() on it.
> */
> - perf_mmap__init(&map[i], overwrite, NULL);
> + perf_mmap__init(&map[i], prev, overwrite, NULL);
> }
>
> return map;
> @@ -405,6 +407,15 @@ perf_evlist__mmap_cb_mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
> return perf_mmap__mmap(map, mp, output, cpu);
> }
>
> +static void perf_evlist__set_mmap0(struct perf_evlist *evlist, struct perf_mmap *map,
> + bool overwrite)
> +{
> + if (overwrite)
> + evlist->mmap_ovw0 = map;
> + else
> + evlist->mmap0 = map;
> +}
> +
> static int
> mmap_per_evsel(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
> int idx, struct perf_mmap_param *mp, int cpu_idx,
> @@ -460,6 +471,9 @@ mmap_per_evsel(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
>
> if (ops->mmap(map, mp, *output, evlist_cpu) < 0)
> return -1;
> +
> + if (!idx)
> + perf_evlist__set_mmap0(evlist, map, overwrite);
> } else {
> if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0)
> return -1;
> @@ -605,3 +619,13 @@ void perf_evlist__munmap(struct perf_evlist *evlist)
> zfree(&evlist->mmap);
> zfree(&evlist->mmap_ovw);
> }
> +
> +struct perf_mmap*
> +perf_evlist__next_mmap(struct perf_evlist *evlist, struct perf_mmap *map,
> + bool overwrite)
> +{
> + if (map)
> + return map->next;
> +
> + return overwrite ? evlist->mmap_ovw0 : evlist->mmap0;
> +}
> diff --git a/tools/perf/lib/include/internal/evlist.h b/tools/perf/lib/include/internal/evlist.h
> index be0b25a70730..513a85cb7bfe 100644
> --- a/tools/perf/lib/include/internal/evlist.h
> +++ b/tools/perf/lib/include/internal/evlist.h
> @@ -25,6 +25,8 @@ struct perf_evlist {
> struct hlist_head heads[PERF_EVLIST__HLIST_SIZE];
> struct perf_mmap *mmap;
> struct perf_mmap *mmap_ovw;
> + struct perf_mmap *mmap0;
> + struct perf_mmap *mmap_ovw0;
Why do you use this funny name? Using this "0" suffix? Please pick
something more informative and add a comment on the struct perf_evlist
definiton.
I've processed up to the previous patch, pushed to acme/tmp.perf/core.
- Arnaldo
> };
>
> typedef void
> diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
> index b328332b6ccf..f5b4f902b453 100644
> --- a/tools/perf/lib/include/internal/mmap.h
> +++ b/tools/perf/lib/include/internal/mmap.h
> @@ -33,6 +33,7 @@ struct perf_mmap {
> u64 flush;
> libperf_unmap_cb_t unmap_cb;
> char event_copy[PERF_SAMPLE_MAX_SIZE] __aligned(8);
> + struct perf_mmap *next;
> };
>
> struct perf_mmap_param {
> @@ -42,8 +43,8 @@ struct perf_mmap_param {
>
> size_t perf_mmap__mmap_len(struct perf_mmap *map);
>
> -void perf_mmap__init(struct perf_mmap *map, bool overwrite,
> - libperf_unmap_cb_t unmap_cb);
> +void perf_mmap__init(struct perf_mmap *map, struct perf_mmap *prev,
> + bool overwrite, libperf_unmap_cb_t unmap_cb);
> int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
> int fd, int cpu);
> void perf_mmap__munmap(struct perf_mmap *map);
> diff --git a/tools/perf/lib/include/perf/evlist.h b/tools/perf/lib/include/perf/evlist.h
> index 16f526e74d13..8c4b3c28535e 100644
> --- a/tools/perf/lib/include/perf/evlist.h
> +++ b/tools/perf/lib/include/perf/evlist.h
> @@ -3,6 +3,7 @@
> #define __LIBPERF_EVLIST_H
>
> #include <perf/core.h>
> +#include <stdbool.h>
>
> struct perf_evlist;
> struct perf_evsel;
> @@ -38,4 +39,12 @@ LIBPERF_API int perf_evlist__filter_pollfd(struct perf_evlist *evlist,
> LIBPERF_API int perf_evlist__mmap(struct perf_evlist *evlist, int pages);
> LIBPERF_API void perf_evlist__munmap(struct perf_evlist *evlist);
>
> +LIBPERF_API struct perf_mmap *perf_evlist__next_mmap(struct perf_evlist *evlist,
> + struct perf_mmap *map,
> + bool overwrite);
> +#define perf_evlist__for_each_mmap(evlist, pos, overwrite) \
> + for ((pos) = perf_evlist__next_mmap((evlist), NULL, overwrite); \
> + (pos) != NULL; \
> + (pos) = perf_evlist__next_mmap((evlist), (pos), overwrite))
> +
> #endif /* __LIBPERF_EVLIST_H */
> diff --git a/tools/perf/lib/libperf.map b/tools/perf/lib/libperf.map
> index 2184aba36c3f..8be02afc324b 100644
> --- a/tools/perf/lib/libperf.map
> +++ b/tools/perf/lib/libperf.map
> @@ -43,6 +43,7 @@ LIBPERF_0.0.1 {
> perf_evlist__mmap;
> perf_evlist__munmap;
> perf_evlist__filter_pollfd;
> + perf_evlist__next_mmap;
> perf_mmap__consume;
> perf_mmap__read_init;
> perf_mmap__read_done;
> diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
> index fe9e1b095fd7..fe7e9ef8a68c 100644
> --- a/tools/perf/lib/mmap.c
> +++ b/tools/perf/lib/mmap.c
> @@ -12,13 +12,15 @@
> #include <internal/lib.h>
> #include "internal.h"
>
> -void perf_mmap__init(struct perf_mmap *map, bool overwrite,
> - libperf_unmap_cb_t unmap_cb)
> +void perf_mmap__init(struct perf_mmap *map, struct perf_mmap *prev,
> + bool overwrite, libperf_unmap_cb_t unmap_cb)
> {
> map->fd = -1;
> map->overwrite = overwrite;
> map->unmap_cb = unmap_cb;
> refcount_set(&map->refcnt, 0);
> + if (prev)
> + prev->next = map;
> }
>
> size_t perf_mmap__mmap_len(struct perf_mmap *map)
> diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
> index 4910ae711b13..469a5476ef1a 100644
> --- a/tools/perf/util/evlist.c
> +++ b/tools/perf/util/evlist.c
> @@ -582,6 +582,8 @@ static struct mmap *evlist__alloc_mmap(struct evlist *evlist,
> return NULL;
>
> for (i = 0; i < evlist->core.nr_mmaps; i++) {
> + struct perf_mmap *prev = i ? &map[i - 1].core : NULL;
> +
> /*
> * When the perf_mmap() call is made we grab one refcount, plus
> * one extra to let perf_mmap__consume() get the last
> @@ -591,7 +593,7 @@ static struct mmap *evlist__alloc_mmap(struct evlist *evlist,
> * Each PERF_EVENT_IOC_SET_OUTPUT points to this mmap and
> * thus does perf_mmap__get() on it.
> */
> - perf_mmap__init(&map[i].core, overwrite, perf_mmap__unmap_cb);
> + perf_mmap__init(&map[i].core, prev, overwrite, perf_mmap__unmap_cb);
> }
>
> return map;
> --
> 2.21.0
--
- Arnaldo
^ permalink raw reply [flat|nested] 69+ messages in thread
* Re: [PATCH 12/36] libperf: Add perf_mmap__read_event() function
2019-10-10 15:32 ` Jiri Olsa
@ 2019-10-10 16:07 ` Arnaldo Carvalho de Melo
0 siblings, 0 replies; 69+ messages in thread
From: Arnaldo Carvalho de Melo @ 2019-10-10 16:07 UTC (permalink / raw)
To: Jiri Olsa
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, lkml, Ingo Molnar
Em Thu, Oct 10, 2019 at 05:32:32PM +0200, Jiri Olsa escreveu:
> On Thu, Oct 10, 2019 at 11:47:00AM -0300, Arnaldo Carvalho de Melo wrote:
>
> SNIP
>
> > > diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
> > > index ee536c4441bb..b328332b6ccf 100644
> > > --- a/tools/perf/lib/include/internal/mmap.h
> > > +++ b/tools/perf/lib/include/internal/mmap.h
> > > @@ -11,6 +11,7 @@
> > > #define PERF_SAMPLE_MAX_SIZE (1 << 16)
> > >
> > > struct perf_mmap;
> > > +union perf_event;
> >
> > Why are you adding this here?
>
> oops, it should be in lib/include/perf/mmap.h ;-)
> plz let me know if you want me to repost
I fixed it already, its in acme/tmp.perf/core, will continue later,
possibly will push to Ingo what I have there if it passes all the
tests, its getting too big a perf/core. :-)
- Arnaldo
^ permalink raw reply [flat|nested] 69+ messages in thread
* Re: [PATCH 27/36] libperf: Add perf_evlist__for_each_mmap function
2019-10-10 16:06 ` Arnaldo Carvalho de Melo
@ 2019-10-10 16:20 ` Jiri Olsa
0 siblings, 0 replies; 69+ messages in thread
From: Jiri Olsa @ 2019-10-10 16:20 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo
Cc: Jiri Olsa, lkml, Ingo Molnar, Namhyung Kim, Alexander Shishkin,
Peter Zijlstra, Michael Petlan
On Thu, Oct 10, 2019 at 01:06:22PM -0300, Arnaldo Carvalho de Melo wrote:
SNIP
> > diff --git a/tools/perf/lib/include/internal/evlist.h b/tools/perf/lib/include/internal/evlist.h
> > index be0b25a70730..513a85cb7bfe 100644
> > --- a/tools/perf/lib/include/internal/evlist.h
> > +++ b/tools/perf/lib/include/internal/evlist.h
> > @@ -25,6 +25,8 @@ struct perf_evlist {
> > struct hlist_head heads[PERF_EVLIST__HLIST_SIZE];
> > struct perf_mmap *mmap;
> > struct perf_mmap *mmap_ovw;
> > + struct perf_mmap *mmap0;
> > + struct perf_mmap *mmap_ovw0;
>
> Why do you use this funny name? Using this "0" suffix? Please pick
> something more informative and add a comment on the struct perf_evlist
> definiton.
it's the first mmap.. I can spell it ;-)
>
> I've processed up to the previous patch, pushed to acme/tmp.perf/core.
great, I'll rebase and continue from there
thanks,
jirka
^ permalink raw reply [flat|nested] 69+ messages in thread
* [tip: perf/core] libperf: Adopt perf_evlist__filter_pollfd() from tools/perf
2019-10-07 12:53 ` [PATCH 26/36] libperf: Add perf_evlist__filter_pollfd function Jiri Olsa
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
0 siblings, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, Arnaldo Carvalho de Melo, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: 84227cb11ff4d9815b9b1daf0c1a2bd7e9274c58
Gitweb: https://git.kernel.org/tip/84227cb11ff4d9815b9b1daf0c1a2bd7e9274c58
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:34 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 12:58:45 -03:00
libperf: Adopt perf_evlist__filter_pollfd() from tools/perf
Introduce the perf_evlist__filter_pollfd function and export it in the
perf/evlist.h header, so that libperf users can check if the descriptor
is still alive.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-27-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/lib/evlist.c | 15 +++++++++++++++
tools/perf/lib/include/perf/evlist.h | 2 ++
tools/perf/lib/libperf.map | 1 +
tools/perf/util/evlist.c | 12 +-----------
4 files changed, 19 insertions(+), 11 deletions(-)
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index 9534ad9..6504561 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -313,6 +313,21 @@ int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd,
return pos;
}
+static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd,
+ void *arg __maybe_unused)
+{
+ struct perf_mmap *map = fda->priv[fd].ptr;
+
+ if (map)
+ perf_mmap__put(map);
+}
+
+int perf_evlist__filter_pollfd(struct perf_evlist *evlist, short revents_and_mask)
+{
+ return fdarray__filter(&evlist->pollfd, revents_and_mask,
+ perf_evlist__munmap_filtered, NULL);
+}
+
int perf_evlist__poll(struct perf_evlist *evlist, int timeout)
{
return fdarray__poll(&evlist->pollfd, timeout);
diff --git a/tools/perf/lib/include/perf/evlist.h b/tools/perf/lib/include/perf/evlist.h
index 28b6a12..16f526e 100644
--- a/tools/perf/lib/include/perf/evlist.h
+++ b/tools/perf/lib/include/perf/evlist.h
@@ -32,6 +32,8 @@ LIBPERF_API void perf_evlist__set_maps(struct perf_evlist *evlist,
struct perf_cpu_map *cpus,
struct perf_thread_map *threads);
LIBPERF_API int perf_evlist__poll(struct perf_evlist *evlist, int timeout);
+LIBPERF_API int perf_evlist__filter_pollfd(struct perf_evlist *evlist,
+ short revents_and_mask);
LIBPERF_API int perf_evlist__mmap(struct perf_evlist *evlist, int pages);
LIBPERF_API void perf_evlist__munmap(struct perf_evlist *evlist);
diff --git a/tools/perf/lib/libperf.map b/tools/perf/lib/libperf.map
index 5a18fd1..2184aba 100644
--- a/tools/perf/lib/libperf.map
+++ b/tools/perf/lib/libperf.map
@@ -42,6 +42,7 @@ LIBPERF_0.0.1 {
perf_evlist__poll;
perf_evlist__mmap;
perf_evlist__munmap;
+ perf_evlist__filter_pollfd;
perf_mmap__consume;
perf_mmap__read_init;
perf_mmap__read_done;
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 031ace3..21b77ef 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -423,19 +423,9 @@ int evlist__add_pollfd(struct evlist *evlist, int fd)
return perf_evlist__add_pollfd(&evlist->core, fd, NULL, POLLIN);
}
-static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd,
- void *arg __maybe_unused)
-{
- struct perf_mmap *map = fda->priv[fd].ptr;
-
- if (map)
- perf_mmap__put(map);
-}
-
int evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask)
{
- return fdarray__filter(&evlist->core.pollfd, revents_and_mask,
- perf_evlist__munmap_filtered, NULL);
+ return perf_evlist__filter_pollfd(&evlist->core, revents_and_mask);
}
int evlist__poll(struct evlist *evlist, int timeout)
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [tip: perf/core] libperf: Introduce perf_evlist__purge()
2019-10-07 12:53 ` [PATCH 25/36] libperf: Add perf_evlist__purge function Jiri Olsa
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
0 siblings, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, Arnaldo Carvalho de Melo, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: 696f27c994ed056fd176ce9dc51c7988e148e4b0
Gitweb: https://git.kernel.org/tip/696f27c994ed056fd176ce9dc51c7988e148e4b0
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:33 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 12:57:22 -03:00
libperf: Introduce perf_evlist__purge()
Add a static perf_evlist__purge() function to purge evsels from a evlist.
Add also perf_evlist__for_each_entry_safe() which is used by
perf_evlist__purge().
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-26-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/lib/evlist.c | 13 +++++++++++++
tools/perf/lib/include/internal/evlist.h | 18 ++++++++++++++++++
2 files changed, 31 insertions(+)
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index 7ba98f0..9534ad9 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -109,6 +109,18 @@ perf_evlist__next(struct perf_evlist *evlist, struct perf_evsel *prev)
return next;
}
+static void perf_evlist__purge(struct perf_evlist *evlist)
+{
+ struct perf_evsel *pos, *n;
+
+ perf_evlist__for_each_entry_safe(evlist, n, pos) {
+ list_del_init(&pos->node);
+ perf_evsel__delete(pos);
+ }
+
+ evlist->nr_entries = 0;
+}
+
void perf_evlist__exit(struct perf_evlist *evlist)
{
perf_cpu_map__put(evlist->cpus);
@@ -125,6 +137,7 @@ void perf_evlist__delete(struct perf_evlist *evlist)
perf_evlist__munmap(evlist);
perf_evlist__close(evlist);
+ perf_evlist__purge(evlist);
perf_evlist__exit(evlist);
free(evlist);
}
diff --git a/tools/perf/lib/include/internal/evlist.h b/tools/perf/lib/include/internal/evlist.h
index 0721512..be0b25a 100644
--- a/tools/perf/lib/include/internal/evlist.h
+++ b/tools/perf/lib/include/internal/evlist.h
@@ -82,6 +82,24 @@ void perf_evlist__exit(struct perf_evlist *evlist);
#define perf_evlist__for_each_entry_reverse(evlist, evsel) \
__perf_evlist__for_each_entry_reverse(&(evlist)->entries, evsel)
+/**
+ * __perf_evlist__for_each_entry_safe - safely iterate thru all the evsels
+ * @list: list_head instance to iterate
+ * @tmp: struct evsel temp iterator
+ * @evsel: struct evsel iterator
+ */
+#define __perf_evlist__for_each_entry_safe(list, tmp, evsel) \
+ list_for_each_entry_safe(evsel, tmp, list, node)
+
+/**
+ * perf_evlist__for_each_entry_safe - safely iterate thru all the evsels
+ * @evlist: evlist instance to iterate
+ * @evsel: struct evsel iterator
+ * @tmp: struct evsel temp iterator
+ */
+#define perf_evlist__for_each_entry_safe(evlist, tmp, evsel) \
+ __perf_evlist__for_each_entry_safe(&(evlist)->entries, tmp, evsel)
+
static inline struct perf_evsel *perf_evlist__first(struct perf_evlist *evlist)
{
return list_entry(evlist->entries.next, struct perf_evsel, node);
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [tip: perf/core] libperf: Introduce perf_evlist__exit()
2019-10-07 12:53 ` [PATCH 24/36] libperf: Add perf_evlist__exit function Jiri Olsa
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
0 siblings, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, Arnaldo Carvalho de Melo, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: 93dd6e2831ff399f7685aa2157b997b6392efac8
Gitweb: https://git.kernel.org/tip/93dd6e2831ff399f7685aa2157b997b6392efac8
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:32 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 12:56:01 -03:00
libperf: Introduce perf_evlist__exit()
Add the perf_evlist__exit() function, so far it's not exported and added
only for internal use for perf and libperf.
USe it to release cpus/threads and pollfd array.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-25-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/lib/evlist.c | 12 +++++++++++-
tools/perf/lib/include/internal/evlist.h | 2 ++
tools/perf/util/evlist.c | 6 +-----
3 files changed, 14 insertions(+), 6 deletions(-)
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index 5ae1da9..7ba98f0 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -109,13 +109,23 @@ perf_evlist__next(struct perf_evlist *evlist, struct perf_evsel *prev)
return next;
}
+void perf_evlist__exit(struct perf_evlist *evlist)
+{
+ perf_cpu_map__put(evlist->cpus);
+ perf_thread_map__put(evlist->threads);
+ evlist->cpus = NULL;
+ evlist->threads = NULL;
+ fdarray__exit(&evlist->pollfd);
+}
+
void perf_evlist__delete(struct perf_evlist *evlist)
{
if (evlist == NULL)
return;
perf_evlist__munmap(evlist);
- fdarray__exit(&evlist->pollfd);
+ perf_evlist__close(evlist);
+ perf_evlist__exit(evlist);
free(evlist);
}
diff --git a/tools/perf/lib/include/internal/evlist.h b/tools/perf/lib/include/internal/evlist.h
index b201970..0721512 100644
--- a/tools/perf/lib/include/internal/evlist.h
+++ b/tools/perf/lib/include/internal/evlist.h
@@ -48,6 +48,8 @@ int perf_evlist__mmap_ops(struct perf_evlist *evlist,
struct perf_evlist_mmap_ops *ops,
struct perf_mmap_param *mp);
+void perf_evlist__exit(struct perf_evlist *evlist);
+
/**
* __perf_evlist__for_each_entry - iterate thru all the evsels
* @list: list_head instance to iterate
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 5192c65..031ace3 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -138,7 +138,7 @@ void evlist__exit(struct evlist *evlist)
{
zfree(&evlist->mmap);
zfree(&evlist->overwrite_mmap);
- fdarray__exit(&evlist->core.pollfd);
+ perf_evlist__exit(&evlist->core);
}
void evlist__delete(struct evlist *evlist)
@@ -148,10 +148,6 @@ void evlist__delete(struct evlist *evlist)
evlist__munmap(evlist);
evlist__close(evlist);
- perf_cpu_map__put(evlist->core.cpus);
- perf_thread_map__put(evlist->core.threads);
- evlist->core.cpus = NULL;
- evlist->core.threads = NULL;
evlist__purge(evlist);
evlist__exit(evlist);
free(evlist);
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [tip: perf/core] libperf: Centralize map refcnt setting
2019-10-07 12:53 ` [PATCH 22/36] libperf: Centralize map refcnt setting Jiri Olsa
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
0 siblings, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, Arnaldo Carvalho de Melo, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: 285aaeac8c5d537b56b70169e21ac29ae5caa8e1
Gitweb: https://git.kernel.org/tip/285aaeac8c5d537b56b70169e21ac29ae5caa8e1
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:30 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 12:52:41 -03:00
libperf: Centralize map refcnt setting
Currently when a new map is mmapped we set its refcnt to 2 in the
perf_evlist_mmap_ops::mmap callback.
Every mmap gets its refcnt set to 2 when it's first mmaped:
- 1 for the current user, which will be taken out by a call to
perf_evlist__munmap_filtered(), where we find out there's
no more data comming from kernel to this mmap.
- 1 for the drain code where in perf_mmap__consume() the mmap
is released if it is empty.
Move this common setup into libperf's generic code before the mmap
callback is called.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-23-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/lib/evlist.c | 30 +++++++++++++++---------------
tools/perf/util/mmap.c | 15 ---------------
2 files changed, 15 insertions(+), 30 deletions(-)
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index b697226..f9a802d 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -362,21 +362,6 @@ static int
perf_evlist__mmap_cb_mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
int output, int cpu)
{
- /*
- * The last one will be done at perf_mmap__consume(), so that we
- * make sure we don't prevent tools from consuming every last event in
- * the ring buffer.
- *
- * I.e. we can get the POLLHUP meaning that the fd doesn't exist
- * anymore, but the last events for it are still in the ring buffer,
- * waiting to be consumed.
- *
- * Tools can chose to ignore this at their own discretion, but the
- * evlist layer can't just drop it when filtering events in
- * perf_evlist__filter_pollfd().
- */
- refcount_set(&map->refcnt, 2);
-
return perf_mmap__mmap(map, mp, output, cpu);
}
@@ -418,6 +403,21 @@ mmap_per_evsel(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
if (*output == -1) {
*output = fd;
+ /*
+ * The last one will be done at perf_mmap__consume(), so that we
+ * make sure we don't prevent tools from consuming every last event in
+ * the ring buffer.
+ *
+ * I.e. we can get the POLLHUP meaning that the fd doesn't exist
+ * anymore, but the last events for it are still in the ring buffer,
+ * waiting to be consumed.
+ *
+ * Tools can chose to ignore this at their own discretion, but the
+ * evlist layer can't just drop it when filtering events in
+ * perf_evlist__filter_pollfd().
+ */
+ refcount_set(&map->refcnt, 2);
+
if (ops->mmap(map, mp, *output, evlist_cpu) < 0)
return -1;
} else {
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index 2a8bf0a..063d1b9 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -243,21 +243,6 @@ static void perf_mmap__setup_affinity_mask(struct mmap *map, struct mmap_params
int mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu)
{
- /*
- * The last one will be done at perf_mmap__consume(), so that we
- * make sure we don't prevent tools from consuming every last event in
- * the ring buffer.
- *
- * I.e. we can get the POLLHUP meaning that the fd doesn't exist
- * anymore, but the last events for it are still in the ring buffer,
- * waiting to be consumed.
- *
- * Tools can chose to ignore this at their own discretion, but the
- * evlist layer can't just drop it when filtering events in
- * perf_evlist__filter_pollfd().
- */
- refcount_set(&map->core.refcnt, 2);
-
if (perf_mmap__mmap(&map->core, &mp->core, fd, cpu)) {
pr_debug2("failed to mmap perf event ring buffer, error %d\n",
errno);
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [tip: perf/core] libperf: Move the pollfd allocation from tools/perf to libperf
2019-10-07 12:53 ` [PATCH 23/36] libperf: Move pollfd allocation to libperf Jiri Olsa
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
0 siblings, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, Arnaldo Carvalho de Melo, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: 230662e15ed6cc63ecf72ed1bffa3cadef486850
Gitweb: https://git.kernel.org/tip/230662e15ed6cc63ecf72ed1bffa3cadef486850
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:31 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 12:54:35 -03:00
libperf: Move the pollfd allocation from tools/perf to libperf
It's needed in libperf only, so move it to the perf_evlist__mmap_ops()
function.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-24-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/lib/evlist.c | 5 +++++
tools/perf/util/evlist.c | 4 ----
2 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index f9a802d..5ae1da9 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -34,6 +34,7 @@ void perf_evlist__init(struct perf_evlist *evlist)
INIT_HLIST_HEAD(&evlist->heads[i]);
INIT_LIST_HEAD(&evlist->entries);
evlist->nr_entries = 0;
+ fdarray__init(&evlist->pollfd, 64);
}
static void __perf_evlist__propagate_maps(struct perf_evlist *evlist,
@@ -114,6 +115,7 @@ void perf_evlist__delete(struct perf_evlist *evlist)
return;
perf_evlist__munmap(evlist);
+ fdarray__exit(&evlist->pollfd);
free(evlist);
}
@@ -525,6 +527,9 @@ int perf_evlist__mmap_ops(struct perf_evlist *evlist,
return -ENOMEM;
}
+ if (evlist->pollfd.entries == NULL && perf_evlist__alloc_pollfd(evlist) < 0)
+ return -ENOMEM;
+
if (perf_cpu_map__empty(cpus))
return mmap_per_thread(evlist, ops, mp);
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 3f4f11f..5192c65 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -58,7 +58,6 @@ void evlist__init(struct evlist *evlist, struct perf_cpu_map *cpus,
{
perf_evlist__init(&evlist->core);
perf_evlist__set_maps(&evlist->core, cpus, threads);
- fdarray__init(&evlist->core.pollfd, 64);
evlist->workload.pid = -1;
evlist->bkw_mmap_state = BKW_MMAP_NOTREADY;
}
@@ -829,9 +828,6 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
if (!evlist->mmap)
return -ENOMEM;
- if (evlist->core.pollfd.entries == NULL && perf_evlist__alloc_pollfd(&evlist->core) < 0)
- return -ENOMEM;
-
evlist->core.mmap_len = evlist__mmap_size(pages);
pr_debug("mmap size %zuB\n", evlist->core.mmap_len);
mp.core.mask = evlist->core.mmap_len - page_size - 1;
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [tip: perf/core] perf evlist: Switch to libperf's mmap interface
2019-10-07 12:53 ` [PATCH 21/36] perf tools: Switch to libperf mmap interface Jiri Olsa
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
0 siblings, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, Arnaldo Carvalho de Melo, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: 923d0f1868cb331d660fb569ecd00c39889905f6
Gitweb: https://git.kernel.org/tip/923d0f1868cb331d660fb569ecd00c39889905f6
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:29 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 12:46:04 -03:00
perf evlist: Switch to libperf's mmap interface
Switch to the libperf mmap interface by calling directly
perf_evlist__mmap_ops() and removing perf's evlist__mmap_per_*
functions.
By switching to libperf perf_evlist__mmap() we need to operate over
'struct perf_mmap' in evlist__add_pollfd, so make the related changes
there.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-22-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/evlist.c | 179 +--------------------------------------
1 file changed, 4 insertions(+), 175 deletions(-)
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index d57b684..3f4f11f 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -431,10 +431,10 @@ int evlist__add_pollfd(struct evlist *evlist, int fd)
static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd,
void *arg __maybe_unused)
{
- struct mmap *map = fda->priv[fd].ptr;
+ struct perf_mmap *map = fda->priv[fd].ptr;
if (map)
- perf_mmap__put(&map->core);
+ perf_mmap__put(map);
}
int evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask)
@@ -448,22 +448,6 @@ int evlist__poll(struct evlist *evlist, int timeout)
return perf_evlist__poll(&evlist->core, timeout);
}
-static void perf_evlist__set_sid_idx(struct evlist *evlist,
- struct evsel *evsel, int idx, int cpu,
- int thread)
-{
- struct perf_sample_id *sid = SID(evsel, cpu, thread);
- sid->idx = idx;
- if (evlist->core.cpus && cpu >= 0)
- sid->cpu = evlist->core.cpus->map[cpu];
- else
- sid->cpu = -1;
- if (!evsel->core.system_wide && evlist->core.threads && thread >= 0)
- sid->tid = perf_thread_map__pid(evlist->core.threads, thread);
- else
- sid->tid = -1;
-}
-
struct perf_sample_id *perf_evlist__id2sid(struct evlist *evlist, u64 id)
{
struct hlist_head *head;
@@ -652,93 +636,6 @@ static struct mmap *evlist__alloc_mmap(struct evlist *evlist,
return map;
}
-static bool
-perf_evlist__should_poll(struct evlist *evlist __maybe_unused,
- struct evsel *evsel)
-{
- if (evsel->core.attr.write_backward)
- return false;
- return true;
-}
-
-static int evlist__mmap_per_evsel(struct evlist *evlist, int idx,
- struct mmap_params *mp, int cpu_idx,
- int thread, int *_output, int *_output_overwrite)
-{
- struct evsel *evsel;
- int revent;
- int evlist_cpu = cpu_map__cpu(evlist->core.cpus, cpu_idx);
-
- evlist__for_each_entry(evlist, evsel) {
- struct mmap *maps = evlist->mmap;
- int *output = _output;
- int fd;
- int cpu;
-
- mp->core.prot = PROT_READ | PROT_WRITE;
- if (evsel->core.attr.write_backward) {
- output = _output_overwrite;
- maps = evlist->overwrite_mmap;
-
- if (!maps) {
- maps = evlist__alloc_mmap(evlist, true);
- if (!maps)
- return -1;
- evlist->overwrite_mmap = maps;
- if (evlist->bkw_mmap_state == BKW_MMAP_NOTREADY)
- perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING);
- }
- mp->core.prot &= ~PROT_WRITE;
- }
-
- if (evsel->core.system_wide && thread)
- continue;
-
- cpu = perf_cpu_map__idx(evsel->core.cpus, evlist_cpu);
- if (cpu == -1)
- continue;
-
- fd = FD(evsel, cpu, thread);
-
- if (*output == -1) {
- *output = fd;
-
- if (mmap__mmap(&maps[idx], mp, *output, evlist_cpu) < 0)
- return -1;
- } else {
- if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0)
- return -1;
-
- perf_mmap__get(&maps[idx].core);
- }
-
- revent = perf_evlist__should_poll(evlist, evsel) ? POLLIN : 0;
-
- /*
- * The system_wide flag causes a selected event to be opened
- * always without a pid. Consequently it will never get a
- * POLLHUP, but it is used for tracking in combination with
- * other events, so it should not need to be polled anyway.
- * Therefore don't add it for polling.
- */
- if (!evsel->core.system_wide &&
- perf_evlist__add_pollfd(&evlist->core, fd, &maps[idx], revent) < 0) {
- perf_mmap__put(&maps[idx].core);
- return -1;
- }
-
- if (evsel->core.attr.read_format & PERF_FORMAT_ID) {
- if (perf_evlist__id_add_fd(&evlist->core, &evsel->core, cpu, thread,
- fd) < 0)
- return -1;
- perf_evlist__set_sid_idx(evlist, evsel, idx, cpu,
- thread);
- }
- }
-
- return 0;
-}
-
static void
perf_evlist__mmap_cb_idx(struct perf_evlist *_evlist,
struct perf_mmap_param *_mp,
@@ -783,61 +680,6 @@ perf_evlist__mmap_cb_mmap(struct perf_mmap *_map, struct perf_mmap_param *_mp,
return mmap__mmap(map, mp, output, cpu);
}
-static int evlist__mmap_per_cpu(struct evlist *evlist,
- struct mmap_params *mp)
-{
- int cpu, thread;
- int nr_cpus = perf_cpu_map__nr(evlist->core.cpus);
- int nr_threads = perf_thread_map__nr(evlist->core.threads);
-
- pr_debug2("perf event ring buffer mmapped per cpu\n");
- for (cpu = 0; cpu < nr_cpus; cpu++) {
- int output = -1;
- int output_overwrite = -1;
-
- auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, cpu,
- true);
-
- for (thread = 0; thread < nr_threads; thread++) {
- if (evlist__mmap_per_evsel(evlist, cpu, mp, cpu,
- thread, &output, &output_overwrite))
- goto out_unmap;
- }
- }
-
- return 0;
-
-out_unmap:
- evlist__munmap_nofree(evlist);
- return -1;
-}
-
-static int evlist__mmap_per_thread(struct evlist *evlist,
- struct mmap_params *mp)
-{
- int thread;
- int nr_threads = perf_thread_map__nr(evlist->core.threads);
-
- pr_debug2("perf event ring buffer mmapped per thread\n");
- for (thread = 0; thread < nr_threads; thread++) {
- int output = -1;
- int output_overwrite = -1;
-
- auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, thread,
- false);
-
- if (evlist__mmap_per_evsel(evlist, thread, mp, 0, thread,
- &output, &output_overwrite))
- goto out_unmap;
- }
-
- return 0;
-
-out_unmap:
- evlist__munmap_nofree(evlist);
- return -1;
-}
-
unsigned long perf_event_mlock_kb_in_pages(void)
{
unsigned long pages;
@@ -965,9 +807,6 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
bool auxtrace_overwrite, int nr_cblocks, int affinity, int flush,
int comp_level)
{
- struct evsel *evsel;
- const struct perf_cpu_map *cpus = evlist->core.cpus;
- const struct perf_thread_map *threads = evlist->core.threads;
/*
* Delay setting mp.prot: set it before calling perf_mmap__mmap.
* Its value is decided by evsel's write_backward.
@@ -979,7 +818,7 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
.flush = flush,
.comp_level = comp_level
};
- struct perf_evlist_mmap_ops ops __maybe_unused = {
+ struct perf_evlist_mmap_ops ops = {
.idx = perf_evlist__mmap_cb_idx,
.get = perf_evlist__mmap_cb_get,
.mmap = perf_evlist__mmap_cb_mmap,
@@ -1000,17 +839,7 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
auxtrace_mmap_params__init(&mp.auxtrace_mp, evlist->core.mmap_len,
auxtrace_pages, auxtrace_overwrite);
- evlist__for_each_entry(evlist, evsel) {
- if ((evsel->core.attr.read_format & PERF_FORMAT_ID) &&
- evsel->core.sample_id == NULL &&
- perf_evsel__alloc_id(&evsel->core, perf_cpu_map__nr(cpus), threads->nr) < 0)
- return -ENOMEM;
- }
-
- if (perf_cpu_map__empty(cpus))
- return evlist__mmap_per_thread(evlist, &mp);
-
- return evlist__mmap_per_cpu(evlist, &mp);
+ return perf_evlist__mmap_ops(&evlist->core, &ops, &mp.core);
}
int evlist__mmap(struct evlist *evlist, unsigned int pages)
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [tip: perf/core] perf evlist: Introduce perf_evlist__mmap_cb_mmap()
2019-10-07 12:53 ` [PATCH 20/36] perf tools: Add perf_evlist__mmap_cb_mmap function Jiri Olsa
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
0 siblings, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, Arnaldo Carvalho de Melo, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: b80132b12a78ec71de2b3320cc49d4a0b2cd7c46
Gitweb: https://git.kernel.org/tip/b80132b12a78ec71de2b3320cc49d4a0b2cd7c46
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:28 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 12:44:59 -03:00
perf evlist: Introduce perf_evlist__mmap_cb_mmap()
Add the perf_evlist__mmap_cb_mmap() function to call perf specific
mmap__mmap() function during perf_evlist__mmap_ops() call.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-21-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/evlist.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index f50ee5c..d57b684 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -773,6 +773,16 @@ perf_evlist__mmap_cb_get(struct perf_evlist *_evlist, bool overwrite, int idx)
return &maps[idx].core;
}
+static int
+perf_evlist__mmap_cb_mmap(struct perf_mmap *_map, struct perf_mmap_param *_mp,
+ int output, int cpu)
+{
+ struct mmap *map = container_of(_map, struct mmap, core);
+ struct mmap_params *mp = container_of(_mp, struct mmap_params, core);
+
+ return mmap__mmap(map, mp, output, cpu);
+}
+
static int evlist__mmap_per_cpu(struct evlist *evlist,
struct mmap_params *mp)
{
@@ -970,8 +980,9 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
.comp_level = comp_level
};
struct perf_evlist_mmap_ops ops __maybe_unused = {
- .idx = perf_evlist__mmap_cb_idx,
- .get = perf_evlist__mmap_cb_get,
+ .idx = perf_evlist__mmap_cb_idx,
+ .get = perf_evlist__mmap_cb_get,
+ .mmap = perf_evlist__mmap_cb_mmap,
};
if (!evlist->mmap)
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [tip: perf/core] libperf: Introduce perf_evlist_mmap_ops::mmap callback
2019-10-07 12:53 ` [PATCH 17/36] libperf: Add perf_evlist_mmap_ops::mmap callback Jiri Olsa
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
0 siblings, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, Arnaldo Carvalho de Melo, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: b5911e7ac28cb34f21b7380915ce98518078f114
Gitweb: https://git.kernel.org/tip/b5911e7ac28cb34f21b7380915ce98518078f114
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:25 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 12:22:21 -03:00
libperf: Introduce perf_evlist_mmap_ops::mmap callback
Add the perf_evlist_mmap_ops::mmap callback to be called in
mmap_per_evsel() to actually mmap the map.
Add libperf's perf_evlist__mmap_cb_mmap() function as libperf's mmap
callback.
New mmaped map gets refcount set to 2 in mmap__mmap(), we follow that in
mmap callback. We will move this to common place after we switch to
perf_evlist__mmap().
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-18-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/lib/evlist.c | 29 ++++++++++++++++++++---
tools/perf/lib/include/internal/evlist.h | 3 ++-
2 files changed, 29 insertions(+), 3 deletions(-)
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index 4f49de5..b697226 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -359,6 +359,28 @@ perf_evlist__mmap_cb_get(struct perf_evlist *evlist, bool overwrite, int idx)
#define FD(e, x, y) (*(int *) xyarray__entry(e->fd, x, y))
static int
+perf_evlist__mmap_cb_mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
+ int output, int cpu)
+{
+ /*
+ * The last one will be done at perf_mmap__consume(), so that we
+ * make sure we don't prevent tools from consuming every last event in
+ * the ring buffer.
+ *
+ * I.e. we can get the POLLHUP meaning that the fd doesn't exist
+ * anymore, but the last events for it are still in the ring buffer,
+ * waiting to be consumed.
+ *
+ * Tools can chose to ignore this at their own discretion, but the
+ * evlist layer can't just drop it when filtering events in
+ * perf_evlist__filter_pollfd().
+ */
+ refcount_set(&map->refcnt, 2);
+
+ return perf_mmap__mmap(map, mp, output, cpu);
+}
+
+static int
mmap_per_evsel(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
int idx, struct perf_mmap_param *mp, int cpu_idx,
int thread, int *_output, int *_output_overwrite)
@@ -396,7 +418,7 @@ mmap_per_evsel(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
if (*output == -1) {
*output = fd;
- if (perf_mmap__mmap(map, mp, *output, evlist_cpu) < 0)
+ if (ops->mmap(map, mp, *output, evlist_cpu) < 0)
return -1;
} else {
if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0)
@@ -488,7 +510,7 @@ int perf_evlist__mmap_ops(struct perf_evlist *evlist,
const struct perf_cpu_map *cpus = evlist->cpus;
const struct perf_thread_map *threads = evlist->threads;
- if (!ops || !ops->get)
+ if (!ops || !ops->get || !ops->mmap)
return -EINVAL;
if (!evlist->mmap)
@@ -513,7 +535,8 @@ int perf_evlist__mmap(struct perf_evlist *evlist, int pages)
{
struct perf_mmap_param mp;
struct perf_evlist_mmap_ops ops = {
- .get = perf_evlist__mmap_cb_get,
+ .get = perf_evlist__mmap_cb_get,
+ .mmap = perf_evlist__mmap_cb_mmap,
};
evlist->mmap_len = (pages + 1) * page_size;
diff --git a/tools/perf/lib/include/internal/evlist.h b/tools/perf/lib/include/internal/evlist.h
index 9bc3a21..b201970 100644
--- a/tools/perf/lib/include/internal/evlist.h
+++ b/tools/perf/lib/include/internal/evlist.h
@@ -31,10 +31,13 @@ typedef void
(*perf_evlist_mmap__cb_idx_t)(struct perf_evlist*, struct perf_mmap_param*, int, bool);
typedef struct perf_mmap*
(*perf_evlist_mmap__cb_get_t)(struct perf_evlist*, bool, int);
+typedef int
+(*perf_evlist_mmap__cb_mmap_t)(struct perf_mmap*, struct perf_mmap_param*, int, int);
struct perf_evlist_mmap_ops {
perf_evlist_mmap__cb_idx_t idx;
perf_evlist_mmap__cb_get_t get;
+ perf_evlist_mmap__cb_mmap_t mmap;
};
int perf_evlist__alloc_pollfd(struct perf_evlist *evlist);
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [tip: perf/core] perf tools: Introduce perf_evlist__mmap_cb_idx()
2019-10-07 12:53 ` [PATCH 18/36] perf tools: Add perf_evlist__mmap_cb_idx function Jiri Olsa
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
0 siblings, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, Arnaldo Carvalho de Melo, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: 9abd2ab2377613425e1c362694f85b110f5bace2
Gitweb: https://git.kernel.org/tip/9abd2ab2377613425e1c362694f85b110f5bace2
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:26 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 12:23:52 -03:00
perf tools: Introduce perf_evlist__mmap_cb_idx()
Add perf_evlist__mmap_cb_idx function to call auxtrace_mmap_params__set_idx()
on each new index during perf_evlist__mmap_ops call.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-19-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/evlist.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index a9b189a..11716f2 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -739,6 +739,17 @@ static int evlist__mmap_per_evsel(struct evlist *evlist, int idx,
return 0;
}
+static void
+perf_evlist__mmap_cb_idx(struct perf_evlist *_evlist,
+ struct perf_mmap_param *_mp,
+ int idx, bool per_cpu)
+{
+ struct evlist *evlist = container_of(_evlist, struct evlist, core);
+ struct mmap_params *mp = container_of(_mp, struct mmap_params, core);
+
+ auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, idx, per_cpu);
+}
+
static int evlist__mmap_per_cpu(struct evlist *evlist,
struct mmap_params *mp)
{
@@ -935,6 +946,9 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
.flush = flush,
.comp_level = comp_level
};
+ struct perf_evlist_mmap_ops ops __maybe_unused = {
+ .idx = perf_evlist__mmap_cb_idx,
+ };
if (!evlist->mmap)
evlist->mmap = evlist__alloc_mmap(evlist, false);
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [tip: perf/core] perf evlist: Introduce perf_evlist__mmap_cb_get()
2019-10-07 12:53 ` [PATCH 19/36] perf tools: Add perf_evlist__mmap_cb_get function Jiri Olsa
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
0 siblings, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, Arnaldo Carvalho de Melo, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: bb1b1885e2f22afb8bc7981cd865fe4b0e3d975b
Gitweb: https://git.kernel.org/tip/bb1b1885e2f22afb8bc7981cd865fe4b0e3d975b
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:27 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 12:30:21 -03:00
perf evlist: Introduce perf_evlist__mmap_cb_get()
Add the perf_evlist__mmap_cb_get() function to return 'struct perf_mmap'
object during perf_evlist__mmap_ops() call.
The array of 'struct mmap' is allocated via evlist__alloc_mmap(), in
this callback we simply returns pointer to the base object.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-20-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/evlist.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 11716f2..f50ee5c 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -750,6 +750,29 @@ perf_evlist__mmap_cb_idx(struct perf_evlist *_evlist,
auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, idx, per_cpu);
}
+static struct perf_mmap*
+perf_evlist__mmap_cb_get(struct perf_evlist *_evlist, bool overwrite, int idx)
+{
+ struct evlist *evlist = container_of(_evlist, struct evlist, core);
+ struct mmap *maps = evlist->mmap;
+
+ if (overwrite) {
+ maps = evlist->overwrite_mmap;
+
+ if (!maps) {
+ maps = evlist__alloc_mmap(evlist, true);
+ if (!maps)
+ return NULL;
+
+ evlist->overwrite_mmap = maps;
+ if (evlist->bkw_mmap_state == BKW_MMAP_NOTREADY)
+ perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING);
+ }
+ }
+
+ return &maps[idx].core;
+}
+
static int evlist__mmap_per_cpu(struct evlist *evlist,
struct mmap_params *mp)
{
@@ -948,6 +971,7 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
};
struct perf_evlist_mmap_ops ops __maybe_unused = {
.idx = perf_evlist__mmap_cb_idx,
+ .get = perf_evlist__mmap_cb_get,
};
if (!evlist->mmap)
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [tip: perf/core] libperf: Introduce perf_evlist_mmap_ops::idx callback
2019-10-07 12:53 ` [PATCH 15/36] libperf: Add perf_evlist_mmap_ops::idx callback Jiri Olsa
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
0 siblings, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, Arnaldo Carvalho de Melo, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: 1fcbb75cc574072ab457dbbaa74fc7064b691e86
Gitweb: https://git.kernel.org/tip/1fcbb75cc574072ab457dbbaa74fc7064b691e86
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:23 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 12:20:08 -03:00
libperf: Introduce perf_evlist_mmap_ops::idx callback
Add the perf_evlist_mmap_ops::idx callback to be called in
mmap_per_cpu() and mmap_per_thread() with current cpu and thread
indexes.
It's used by current aux code, so perf will use this callback to set the
aux index.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-16-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/lib/evlist.c | 18 +++++++++++++-----
tools/perf/lib/include/internal/evlist.h | 4 ++++
2 files changed, 17 insertions(+), 5 deletions(-)
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index 88d63f5..3832d3e 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -426,7 +426,8 @@ mmap_per_evsel(struct perf_evlist *evlist, int idx,
}
static int
-mmap_per_thread(struct perf_evlist *evlist, struct perf_mmap_param *mp)
+mmap_per_thread(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
+ struct perf_mmap_param *mp)
{
int thread;
int nr_threads = perf_thread_map__nr(evlist->threads);
@@ -435,6 +436,9 @@ mmap_per_thread(struct perf_evlist *evlist, struct perf_mmap_param *mp)
int output = -1;
int output_overwrite = -1;
+ if (ops->idx)
+ ops->idx(evlist, mp, thread, false);
+
if (mmap_per_evsel(evlist, thread, mp, 0, thread,
&output, &output_overwrite))
goto out_unmap;
@@ -448,7 +452,8 @@ out_unmap:
}
static int
-mmap_per_cpu(struct perf_evlist *evlist, struct perf_mmap_param *mp)
+mmap_per_cpu(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
+ struct perf_mmap_param *mp)
{
int nr_threads = perf_thread_map__nr(evlist->threads);
int nr_cpus = perf_cpu_map__nr(evlist->cpus);
@@ -458,6 +463,9 @@ mmap_per_cpu(struct perf_evlist *evlist, struct perf_mmap_param *mp)
int output = -1;
int output_overwrite = -1;
+ if (ops->idx)
+ ops->idx(evlist, mp, cpu, true);
+
for (thread = 0; thread < nr_threads; thread++) {
if (mmap_per_evsel(evlist, cpu, mp, cpu,
thread, &output, &output_overwrite))
@@ -496,15 +504,15 @@ int perf_evlist__mmap_ops(struct perf_evlist *evlist,
}
if (perf_cpu_map__empty(cpus))
- return mmap_per_thread(evlist, mp);
+ return mmap_per_thread(evlist, ops, mp);
- return mmap_per_cpu(evlist, mp);
+ return mmap_per_cpu(evlist, ops, mp);
}
int perf_evlist__mmap(struct perf_evlist *evlist, int pages)
{
struct perf_mmap_param mp;
- struct perf_evlist_mmap_ops ops;
+ struct perf_evlist_mmap_ops ops = { 0 };
evlist->mmap_len = (pages + 1) * page_size;
mp.mask = evlist->mmap_len - page_size - 1;
diff --git a/tools/perf/lib/include/internal/evlist.h b/tools/perf/lib/include/internal/evlist.h
index e5f092f..053f620 100644
--- a/tools/perf/lib/include/internal/evlist.h
+++ b/tools/perf/lib/include/internal/evlist.h
@@ -27,7 +27,11 @@ struct perf_evlist {
struct perf_mmap *mmap_ovw;
};
+typedef void
+(*perf_evlist_mmap__cb_idx_t)(struct perf_evlist*, struct perf_mmap_param*, int, bool);
+
struct perf_evlist_mmap_ops {
+ perf_evlist_mmap__cb_idx_t idx;
};
int perf_evlist__alloc_pollfd(struct perf_evlist *evlist);
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [tip: perf/core] libperf: Add perf_evlist_mmap_ops::get callback
2019-10-07 12:53 ` [PATCH 16/36] libperf: Add perf_evlist_mmap_ops::get callback Jiri Olsa
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
0 siblings, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, Arnaldo Carvalho de Melo, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: 3a8bb58121987a8405d6f96cd8815025e564605d
Gitweb: https://git.kernel.org/tip/3a8bb58121987a8405d6f96cd8815025e564605d
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:24 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 12:21:11 -03:00
libperf: Add perf_evlist_mmap_ops::get callback
Add the perf_evlist_mmap_ops::get callback to be called in
mmap_per_evsel() to get/allocate the 'struct perf_mmap' object.
Add the libperf's perf_evlist__mmap_cb_get() function as libperf's get
callback.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-17-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/lib/evlist.c | 18 ++++++++++--------
tools/perf/lib/include/internal/evlist.h | 3 +++
2 files changed, 13 insertions(+), 8 deletions(-)
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index 3832d3e..4f49de5 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -340,7 +340,7 @@ static void perf_evlist__set_sid_idx(struct perf_evlist *evlist,
}
static struct perf_mmap*
-perf_evlist__map_get(struct perf_evlist *evlist, bool overwrite, int idx)
+perf_evlist__mmap_cb_get(struct perf_evlist *evlist, bool overwrite, int idx)
{
struct perf_mmap *map = &evlist->mmap[idx];
@@ -359,8 +359,8 @@ perf_evlist__map_get(struct perf_evlist *evlist, bool overwrite, int idx)
#define FD(e, x, y) (*(int *) xyarray__entry(e->fd, x, y))
static int
-mmap_per_evsel(struct perf_evlist *evlist, int idx,
- struct perf_mmap_param *mp, int cpu_idx,
+mmap_per_evsel(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
+ int idx, struct perf_mmap_param *mp, int cpu_idx,
int thread, int *_output, int *_output_overwrite)
{
int evlist_cpu = perf_cpu_map__cpu(evlist->cpus, cpu_idx);
@@ -379,7 +379,7 @@ mmap_per_evsel(struct perf_evlist *evlist, int idx,
if (cpu == -1)
continue;
- map = perf_evlist__map_get(evlist, overwrite, idx);
+ map = ops->get(evlist, overwrite, idx);
if (map == NULL)
return -ENOMEM;
@@ -439,7 +439,7 @@ mmap_per_thread(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
if (ops->idx)
ops->idx(evlist, mp, thread, false);
- if (mmap_per_evsel(evlist, thread, mp, 0, thread,
+ if (mmap_per_evsel(evlist, ops, thread, mp, 0, thread,
&output, &output_overwrite))
goto out_unmap;
}
@@ -467,7 +467,7 @@ mmap_per_cpu(struct perf_evlist *evlist, struct perf_evlist_mmap_ops *ops,
ops->idx(evlist, mp, cpu, true);
for (thread = 0; thread < nr_threads; thread++) {
- if (mmap_per_evsel(evlist, cpu, mp, cpu,
+ if (mmap_per_evsel(evlist, ops, cpu, mp, cpu,
thread, &output, &output_overwrite))
goto out_unmap;
}
@@ -488,7 +488,7 @@ int perf_evlist__mmap_ops(struct perf_evlist *evlist,
const struct perf_cpu_map *cpus = evlist->cpus;
const struct perf_thread_map *threads = evlist->threads;
- if (!ops)
+ if (!ops || !ops->get)
return -EINVAL;
if (!evlist->mmap)
@@ -512,7 +512,9 @@ int perf_evlist__mmap_ops(struct perf_evlist *evlist,
int perf_evlist__mmap(struct perf_evlist *evlist, int pages)
{
struct perf_mmap_param mp;
- struct perf_evlist_mmap_ops ops = { 0 };
+ struct perf_evlist_mmap_ops ops = {
+ .get = perf_evlist__mmap_cb_get,
+ };
evlist->mmap_len = (pages + 1) * page_size;
mp.mask = evlist->mmap_len - page_size - 1;
diff --git a/tools/perf/lib/include/internal/evlist.h b/tools/perf/lib/include/internal/evlist.h
index 053f620..9bc3a21 100644
--- a/tools/perf/lib/include/internal/evlist.h
+++ b/tools/perf/lib/include/internal/evlist.h
@@ -29,9 +29,12 @@ struct perf_evlist {
typedef void
(*perf_evlist_mmap__cb_idx_t)(struct perf_evlist*, struct perf_mmap_param*, int, bool);
+typedef struct perf_mmap*
+(*perf_evlist_mmap__cb_get_t)(struct perf_evlist*, bool, int);
struct perf_evlist_mmap_ops {
perf_evlist_mmap__cb_idx_t idx;
+ perf_evlist_mmap__cb_get_t get;
};
int perf_evlist__alloc_pollfd(struct perf_evlist *evlist);
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [tip: perf/core] libperf: Introduce perf_evlist__mmap_ops()
2019-10-07 12:53 ` [PATCH 14/36] libperf: Add perf_evlist__mmap_ops function Jiri Olsa
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
0 siblings, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Arnaldo Carvalho de Melo, Alexander Shishkin, Michael Petlan,
Namhyung Kim, Peter Zijlstra, Jiri Olsa, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: 0b5ea10d4c312f5b17af9d09187efb9418517bec
Gitweb: https://git.kernel.org/tip/0b5ea10d4c312f5b17af9d09187efb9418517bec
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:22 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 12:18:00 -03:00
libperf: Introduce perf_evlist__mmap_ops()
To be able to pass specific callbacks to evlist's mmap.
There will be a specific call to this function from perf's
evlist__mmap() and libperf's perf_evlist__mmap() functions in following
changes.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-15-jolsa@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/lib/evlist.c | 24 +++++++++++++++++------
tools/perf/lib/include/internal/evlist.h | 8 ++++++++-
2 files changed, 26 insertions(+), 6 deletions(-)
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index 250ad57..88d63f5 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -472,12 +472,16 @@ out_unmap:
return -1;
}
-int perf_evlist__mmap(struct perf_evlist *evlist, int pages)
+int perf_evlist__mmap_ops(struct perf_evlist *evlist,
+ struct perf_evlist_mmap_ops *ops,
+ struct perf_mmap_param *mp)
{
struct perf_evsel *evsel;
const struct perf_cpu_map *cpus = evlist->cpus;
const struct perf_thread_map *threads = evlist->threads;
- struct perf_mmap_param mp;
+
+ if (!ops)
+ return -EINVAL;
if (!evlist->mmap)
evlist->mmap = perf_evlist__alloc_mmap(evlist, false);
@@ -491,13 +495,21 @@ int perf_evlist__mmap(struct perf_evlist *evlist, int pages)
return -ENOMEM;
}
+ if (perf_cpu_map__empty(cpus))
+ return mmap_per_thread(evlist, mp);
+
+ return mmap_per_cpu(evlist, mp);
+}
+
+int perf_evlist__mmap(struct perf_evlist *evlist, int pages)
+{
+ struct perf_mmap_param mp;
+ struct perf_evlist_mmap_ops ops;
+
evlist->mmap_len = (pages + 1) * page_size;
mp.mask = evlist->mmap_len - page_size - 1;
- if (perf_cpu_map__empty(cpus))
- return mmap_per_thread(evlist, &mp);
-
- return mmap_per_cpu(evlist, &mp);
+ return perf_evlist__mmap_ops(evlist, &ops, &mp);
}
void perf_evlist__munmap(struct perf_evlist *evlist)
diff --git a/tools/perf/lib/include/internal/evlist.h b/tools/perf/lib/include/internal/evlist.h
index 4438a19..e5f092f 100644
--- a/tools/perf/lib/include/internal/evlist.h
+++ b/tools/perf/lib/include/internal/evlist.h
@@ -11,6 +11,7 @@
struct perf_cpu_map;
struct perf_thread_map;
+struct perf_mmap_param;
struct perf_evlist {
struct list_head entries;
@@ -26,10 +27,17 @@ struct perf_evlist {
struct perf_mmap *mmap_ovw;
};
+struct perf_evlist_mmap_ops {
+};
+
int perf_evlist__alloc_pollfd(struct perf_evlist *evlist);
int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd,
void *ptr, short revent);
+int perf_evlist__mmap_ops(struct perf_evlist *evlist,
+ struct perf_evlist_mmap_ops *ops,
+ struct perf_mmap_param *mp);
+
/**
* __perf_evlist__for_each_entry - iterate thru all the evsels
* @list: list_head instance to iterate
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [tip: perf/core] libperf: Adopt perf_mmap__read_done() from tools/perf
2019-10-07 12:53 ` [PATCH 11/36] libperf: Add perf_mmap__read_done() function Jiri Olsa
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
0 siblings, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, Arnaldo Carvalho de Melo, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: 32fdc2ca7e2ae8ae5d0ff660ca7783acd8ee6396
Gitweb: https://git.kernel.org/tip/32fdc2ca7e2ae8ae5d0ff660ca7783acd8ee6396
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:19 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 11:45:32 -03:00
libperf: Adopt perf_mmap__read_done() from tools/perf
Move perf_mmap__read_init() from tools/perf to libperf and export it in
the perf/mmap.h header.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-12-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/arch/x86/tests/perf-time-to-tsc.c | 2 +-
tools/perf/builtin-kvm.c | 2 +-
tools/perf/builtin-top.c | 2 +-
tools/perf/builtin-trace.c | 2 +-
tools/perf/lib/include/perf/mmap.h | 1 +
tools/perf/lib/libperf.map | 1 +
tools/perf/lib/mmap.c | 17 +++++++++++++++++
tools/perf/tests/backward-ring-buffer.c | 2 +-
tools/perf/tests/bpf.c | 2 +-
tools/perf/tests/code-reading.c | 2 +-
tools/perf/tests/keep-tracking.c | 2 +-
tools/perf/tests/mmap-basic.c | 2 +-
tools/perf/tests/openat-syscall-tp-fields.c | 2 +-
tools/perf/tests/perf-record.c | 2 +-
tools/perf/tests/sw-clock.c | 2 +-
tools/perf/tests/switch-tracking.c | 2 +-
tools/perf/tests/task-exit.c | 2 +-
tools/perf/util/evlist.c | 2 +-
tools/perf/util/mmap.c | 17 -----------------
tools/perf/util/mmap.h | 1 -
20 files changed, 34 insertions(+), 33 deletions(-)
diff --git a/tools/perf/arch/x86/tests/perf-time-to-tsc.c b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
index 6a0c3ff..c90d925 100644
--- a/tools/perf/arch/x86/tests/perf-time-to-tsc.c
+++ b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
@@ -142,7 +142,7 @@ int test__perf_time_to_tsc(struct test *test __maybe_unused, int subtest __maybe
next_event:
perf_mmap__consume(&md->core);
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
}
if (!comm1_time || !comm2_time)
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index b6a8078..4c087a8 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -794,7 +794,7 @@ static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
break;
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
return n;
}
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 4a4bb7b..1a54069 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -894,7 +894,7 @@ static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
}
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
}
static void perf_top__mmap_read(struct perf_top *top)
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index cd69d68..2311628 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -3821,7 +3821,7 @@ again:
draining = true;
}
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
}
if (trace->nr_events == before) {
diff --git a/tools/perf/lib/include/perf/mmap.h b/tools/perf/lib/include/perf/mmap.h
index 646e905..4f946e7 100644
--- a/tools/perf/lib/include/perf/mmap.h
+++ b/tools/perf/lib/include/perf/mmap.h
@@ -8,5 +8,6 @@ struct perf_mmap;
LIBPERF_API void perf_mmap__consume(struct perf_mmap *map);
LIBPERF_API int perf_mmap__read_init(struct perf_mmap *map);
+LIBPERF_API void perf_mmap__read_done(struct perf_mmap *map);
#endif /* __LIBPERF_MMAP_H */
diff --git a/tools/perf/lib/libperf.map b/tools/perf/lib/libperf.map
index bc3fbb2..7e3ea2e 100644
--- a/tools/perf/lib/libperf.map
+++ b/tools/perf/lib/libperf.map
@@ -42,6 +42,7 @@ LIBPERF_0.0.1 {
perf_evlist__poll;
perf_mmap__consume;
perf_mmap__read_init;
+ perf_mmap__read_done;
local:
*;
};
diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
index fdbc6c5..97297cb 100644
--- a/tools/perf/lib/mmap.c
+++ b/tools/perf/lib/mmap.c
@@ -175,3 +175,20 @@ int perf_mmap__read_init(struct perf_mmap *map)
return __perf_mmap__read_init(map);
}
+
+/*
+ * Mandatory for overwrite mode
+ * The direction of overwrite mode is backward.
+ * The last perf_mmap__read() will set tail to map->core.prev.
+ * Need to correct the map->core.prev to head which is the end of next read.
+ */
+void perf_mmap__read_done(struct perf_mmap *map)
+{
+ /*
+ * Check if event was unmapped due to a POLLHUP/POLLERR.
+ */
+ if (!refcount_read(&map->refcnt))
+ return;
+
+ map->prev = perf_mmap__read_head(map);
+}
diff --git a/tools/perf/tests/backward-ring-buffer.c b/tools/perf/tests/backward-ring-buffer.c
index ff3a986..13e67cd 100644
--- a/tools/perf/tests/backward-ring-buffer.c
+++ b/tools/perf/tests/backward-ring-buffer.c
@@ -54,7 +54,7 @@ static int count_samples(struct evlist *evlist, int *sample_count,
return TEST_FAIL;
}
}
- perf_mmap__read_done(map);
+ perf_mmap__read_done(&map->core);
}
return TEST_OK;
}
diff --git a/tools/perf/tests/bpf.c b/tools/perf/tests/bpf.c
index 73d26c6..fd45529 100644
--- a/tools/perf/tests/bpf.c
+++ b/tools/perf/tests/bpf.c
@@ -194,7 +194,7 @@ static int do_test(struct bpf_object *obj, int (*func)(void),
if (type == PERF_RECORD_SAMPLE)
count ++;
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
}
if (count != expect) {
diff --git a/tools/perf/tests/code-reading.c b/tools/perf/tests/code-reading.c
index cf992e0..9947cda 100644
--- a/tools/perf/tests/code-reading.c
+++ b/tools/perf/tests/code-reading.c
@@ -435,7 +435,7 @@ static int process_events(struct machine *machine, struct evlist *evlist,
if (ret < 0)
return ret;
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
}
return 0;
}
diff --git a/tools/perf/tests/keep-tracking.c b/tools/perf/tests/keep-tracking.c
index e85da7e..e950907 100644
--- a/tools/perf/tests/keep-tracking.c
+++ b/tools/perf/tests/keep-tracking.c
@@ -49,7 +49,7 @@ static int find_comm(struct evlist *evlist, const char *comm)
found += 1;
perf_mmap__consume(&md->core);
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
}
return found;
}
diff --git a/tools/perf/tests/mmap-basic.c b/tools/perf/tests/mmap-basic.c
index 77f42f0..bb15d40 100644
--- a/tools/perf/tests/mmap-basic.c
+++ b/tools/perf/tests/mmap-basic.c
@@ -142,7 +142,7 @@ int test__basic_mmap(struct test *test __maybe_unused, int subtest __maybe_unuse
nr_events[evsel->idx]++;
perf_mmap__consume(&md->core);
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
out_init:
err = 0;
diff --git a/tools/perf/tests/openat-syscall-tp-fields.c b/tools/perf/tests/openat-syscall-tp-fields.c
index d6a5631..c95eb1b 100644
--- a/tools/perf/tests/openat-syscall-tp-fields.c
+++ b/tools/perf/tests/openat-syscall-tp-fields.c
@@ -124,7 +124,7 @@ int test__syscall_openat_tp_fields(struct test *test __maybe_unused, int subtest
goto out_ok;
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
}
if (nr_events == before)
diff --git a/tools/perf/tests/perf-record.c b/tools/perf/tests/perf-record.c
index 2587cb8..92a53be 100644
--- a/tools/perf/tests/perf-record.c
+++ b/tools/perf/tests/perf-record.c
@@ -279,7 +279,7 @@ int test__PERF_RECORD(struct test *test __maybe_unused, int subtest __maybe_unus
perf_mmap__consume(&md->core);
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
}
/*
diff --git a/tools/perf/tests/sw-clock.c b/tools/perf/tests/sw-clock.c
index 8086695..ace2092 100644
--- a/tools/perf/tests/sw-clock.c
+++ b/tools/perf/tests/sw-clock.c
@@ -120,7 +120,7 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id)
next_event:
perf_mmap__consume(&md->core);
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
out_init:
if ((u64) nr_samples == total_periods) {
diff --git a/tools/perf/tests/switch-tracking.c b/tools/perf/tests/switch-tracking.c
index bedfdec..8400fb1 100644
--- a/tools/perf/tests/switch-tracking.c
+++ b/tools/perf/tests/switch-tracking.c
@@ -280,7 +280,7 @@ static int process_events(struct evlist *evlist,
if (ret < 0)
goto out_free_nodes;
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
}
events_array = calloc(cnt, sizeof(struct event_node));
diff --git a/tools/perf/tests/task-exit.c b/tools/perf/tests/task-exit.c
index 035d423..c6a1394 100644
--- a/tools/perf/tests/task-exit.c
+++ b/tools/perf/tests/task-exit.c
@@ -127,7 +127,7 @@ retry:
perf_mmap__consume(&md->core);
}
- perf_mmap__read_done(md);
+ perf_mmap__read_done(&md->core);
out_init:
if (!exited || !nr_exit) {
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index d9a4a4b..6e070ee 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -1822,7 +1822,7 @@ static void *perf_evlist__poll_thread(void *arg)
perf_mmap__consume(&map->core);
got_data = true;
}
- perf_mmap__read_done(map);
+ perf_mmap__read_done(&map->core);
}
if (draining && !got_data)
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index 5937911..2dedef9 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -405,20 +405,3 @@ int perf_mmap__push(struct mmap *md, void *to,
out:
return rc;
}
-
-/*
- * Mandatory for overwrite mode
- * The direction of overwrite mode is backward.
- * The last perf_mmap__read() will set tail to map->core.prev.
- * Need to correct the map->core.prev to head which is the end of next read.
- */
-void perf_mmap__read_done(struct mmap *map)
-{
- /*
- * Check if event was unmapped due to a POLLHUP/POLLERR.
- */
- if (!refcount_read(&map->core.refcnt))
- return;
-
- map->core.prev = perf_mmap__read_head(&map->core);
-}
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index 6d818ef..0b15702 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -54,5 +54,4 @@ int perf_mmap__push(struct mmap *md, void *to,
size_t mmap__mmap_len(struct mmap *map);
-void perf_mmap__read_done(struct mmap *map);
#endif /*__PERF_MMAP_H */
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [tip: perf/core] libperf: Adopt perf_mmap__read_event() from tools/perf
2019-10-07 12:53 ` [PATCH 12/36] libperf: Add perf_mmap__read_event() function Jiri Olsa
2019-10-10 14:47 ` Arnaldo Carvalho de Melo
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
1 sibling, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, Arnaldo Carvalho de Melo, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: 151ed5d70da87720022e4171227733a008b3c719
Gitweb: https://git.kernel.org/tip/151ed5d70da87720022e4171227733a008b3c719
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:20 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 11:49:46 -03:00
libperf: Adopt perf_mmap__read_event() from tools/perf
Move perf_mmap__read_event() from tools/perf to libperf and export it in
the perf/mmap.h header.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-13-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/arch/x86/tests/perf-time-to-tsc.c | 2 +-
tools/perf/builtin-kvm.c | 2 +-
tools/perf/builtin-top.c | 2 +-
tools/perf/builtin-trace.c | 2 +-
tools/perf/lib/include/perf/mmap.h | 2 +-
tools/perf/lib/libperf.map | 1 +-
tools/perf/lib/mmap.c | 79 +++++++++++++++++++-
tools/perf/tests/backward-ring-buffer.c | 2 +-
tools/perf/tests/bpf.c | 2 +-
tools/perf/tests/code-reading.c | 2 +-
tools/perf/tests/keep-tracking.c | 2 +-
tools/perf/tests/mmap-basic.c | 2 +-
tools/perf/tests/openat-syscall-tp-fields.c | 2 +-
tools/perf/tests/perf-record.c | 2 +-
tools/perf/tests/sw-clock.c | 2 +-
tools/perf/tests/switch-tracking.c | 2 +-
tools/perf/tests/task-exit.c | 2 +-
tools/perf/util/evlist.c | 2 +-
tools/perf/util/mmap.c | 77 +-------------------
tools/perf/util/mmap.h | 2 +-
tools/perf/util/python.c | 2 +-
21 files changed, 98 insertions(+), 95 deletions(-)
diff --git a/tools/perf/arch/x86/tests/perf-time-to-tsc.c b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
index c90d925..909ead0 100644
--- a/tools/perf/arch/x86/tests/perf-time-to-tsc.c
+++ b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
@@ -121,7 +121,7 @@ int test__perf_time_to_tsc(struct test *test __maybe_unused, int subtest __maybe
if (perf_mmap__read_init(&md->core) < 0)
continue;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
struct perf_sample sample;
if (event->header.type != PERF_RECORD_COMM ||
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 4c087a8..858da89 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -764,7 +764,7 @@ static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
if (err < 0)
return (err == -EAGAIN) ? 0 : -1;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
err = perf_evlist__parse_sample_timestamp(evlist, event, ×tamp);
if (err) {
perf_mmap__consume(&md->core);
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 1a54069..d96f24c 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -873,7 +873,7 @@ static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
if (perf_mmap__read_init(&md->core) < 0)
return;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
int ret;
ret = perf_evlist__parse_sample_timestamp(evlist, event, &last_timestamp);
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 2311628..144d417 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -3804,7 +3804,7 @@ again:
if (perf_mmap__read_init(&md->core) < 0)
continue;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
++trace->nr_events;
err = trace__deliver_event(trace, event);
diff --git a/tools/perf/lib/include/perf/mmap.h b/tools/perf/lib/include/perf/mmap.h
index 4f946e7..9508ad9 100644
--- a/tools/perf/lib/include/perf/mmap.h
+++ b/tools/perf/lib/include/perf/mmap.h
@@ -5,9 +5,11 @@
#include <perf/core.h>
struct perf_mmap;
+union perf_event;
LIBPERF_API void perf_mmap__consume(struct perf_mmap *map);
LIBPERF_API int perf_mmap__read_init(struct perf_mmap *map);
LIBPERF_API void perf_mmap__read_done(struct perf_mmap *map);
+LIBPERF_API union perf_event *perf_mmap__read_event(struct perf_mmap *map);
#endif /* __LIBPERF_MMAP_H */
diff --git a/tools/perf/lib/libperf.map b/tools/perf/lib/libperf.map
index 7e3ea2e..8bb0d73 100644
--- a/tools/perf/lib/libperf.map
+++ b/tools/perf/lib/libperf.map
@@ -43,6 +43,7 @@ LIBPERF_0.0.1 {
perf_mmap__consume;
perf_mmap__read_init;
perf_mmap__read_done;
+ perf_mmap__read_event;
local:
*;
};
diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
index 97297cb..0752c19 100644
--- a/tools/perf/lib/mmap.c
+++ b/tools/perf/lib/mmap.c
@@ -3,9 +3,11 @@
#include <inttypes.h>
#include <asm/bug.h>
#include <errno.h>
+#include <string.h>
#include <linux/ring_buffer.h>
#include <linux/perf_event.h>
#include <perf/mmap.h>
+#include <perf/event.h>
#include <internal/mmap.h>
#include <internal/lib.h>
#include <linux/kernel.h>
@@ -192,3 +194,80 @@ void perf_mmap__read_done(struct perf_mmap *map)
map->prev = perf_mmap__read_head(map);
}
+
+/* When check_messup is true, 'end' must points to a good entry */
+static union perf_event *perf_mmap__read(struct perf_mmap *map,
+ u64 *startp, u64 end)
+{
+ unsigned char *data = map->base + page_size;
+ union perf_event *event = NULL;
+ int diff = end - *startp;
+
+ if (diff >= (int)sizeof(event->header)) {
+ size_t size;
+
+ event = (union perf_event *)&data[*startp & map->mask];
+ size = event->header.size;
+
+ if (size < sizeof(event->header) || diff < (int)size)
+ return NULL;
+
+ /*
+ * Event straddles the mmap boundary -- header should always
+ * be inside due to u64 alignment of output.
+ */
+ if ((*startp & map->mask) + size != ((*startp + size) & map->mask)) {
+ unsigned int offset = *startp;
+ unsigned int len = min(sizeof(*event), size), cpy;
+ void *dst = map->event_copy;
+
+ do {
+ cpy = min(map->mask + 1 - (offset & map->mask), len);
+ memcpy(dst, &data[offset & map->mask], cpy);
+ offset += cpy;
+ dst += cpy;
+ len -= cpy;
+ } while (len);
+
+ event = (union perf_event *)map->event_copy;
+ }
+
+ *startp += size;
+ }
+
+ return event;
+}
+
+/*
+ * Read event from ring buffer one by one.
+ * Return one event for each call.
+ *
+ * Usage:
+ * perf_mmap__read_init()
+ * while(event = perf_mmap__read_event()) {
+ * //process the event
+ * perf_mmap__consume()
+ * }
+ * perf_mmap__read_done()
+ */
+union perf_event *perf_mmap__read_event(struct perf_mmap *map)
+{
+ union perf_event *event;
+
+ /*
+ * Check if event was unmapped due to a POLLHUP/POLLERR.
+ */
+ if (!refcount_read(&map->refcnt))
+ return NULL;
+
+ /* non-overwirte doesn't pause the ringbuffer */
+ if (!map->overwrite)
+ map->end = perf_mmap__read_head(map);
+
+ event = perf_mmap__read(map, &map->start, map->end);
+
+ if (!map->overwrite)
+ map->prev = map->start;
+
+ return event;
+}
diff --git a/tools/perf/tests/backward-ring-buffer.c b/tools/perf/tests/backward-ring-buffer.c
index 13e67cd..a4cd30c 100644
--- a/tools/perf/tests/backward-ring-buffer.c
+++ b/tools/perf/tests/backward-ring-buffer.c
@@ -39,7 +39,7 @@ static int count_samples(struct evlist *evlist, int *sample_count,
union perf_event *event;
perf_mmap__read_init(&map->core);
- while ((event = perf_mmap__read_event(map)) != NULL) {
+ while ((event = perf_mmap__read_event(&map->core)) != NULL) {
const u32 type = event->header.type;
switch (type) {
diff --git a/tools/perf/tests/bpf.c b/tools/perf/tests/bpf.c
index fd45529..5d20bf8 100644
--- a/tools/perf/tests/bpf.c
+++ b/tools/perf/tests/bpf.c
@@ -188,7 +188,7 @@ static int do_test(struct bpf_object *obj, int (*func)(void),
if (perf_mmap__read_init(&md->core) < 0)
continue;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
const u32 type = event->header.type;
if (type == PERF_RECORD_SAMPLE)
diff --git a/tools/perf/tests/code-reading.c b/tools/perf/tests/code-reading.c
index 9947cda..1f017e1 100644
--- a/tools/perf/tests/code-reading.c
+++ b/tools/perf/tests/code-reading.c
@@ -429,7 +429,7 @@ static int process_events(struct machine *machine, struct evlist *evlist,
if (perf_mmap__read_init(&md->core) < 0)
continue;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
ret = process_event(machine, evlist, event, state);
perf_mmap__consume(&md->core);
if (ret < 0)
diff --git a/tools/perf/tests/keep-tracking.c b/tools/perf/tests/keep-tracking.c
index e950907..50a0c9f 100644
--- a/tools/perf/tests/keep-tracking.c
+++ b/tools/perf/tests/keep-tracking.c
@@ -41,7 +41,7 @@ static int find_comm(struct evlist *evlist, const char *comm)
md = &evlist->mmap[i];
if (perf_mmap__read_init(&md->core) < 0)
continue;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
if (event->header.type == PERF_RECORD_COMM &&
(pid_t)event->comm.pid == getpid() &&
(pid_t)event->comm.tid == getpid() &&
diff --git a/tools/perf/tests/mmap-basic.c b/tools/perf/tests/mmap-basic.c
index bb15d40..5f4c0db 100644
--- a/tools/perf/tests/mmap-basic.c
+++ b/tools/perf/tests/mmap-basic.c
@@ -117,7 +117,7 @@ int test__basic_mmap(struct test *test __maybe_unused, int subtest __maybe_unuse
if (perf_mmap__read_init(&md->core) < 0)
goto out_init;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
struct perf_sample sample;
if (event->header.type != PERF_RECORD_SAMPLE) {
diff --git a/tools/perf/tests/openat-syscall-tp-fields.c b/tools/perf/tests/openat-syscall-tp-fields.c
index c95eb1b..c6b2d7a 100644
--- a/tools/perf/tests/openat-syscall-tp-fields.c
+++ b/tools/perf/tests/openat-syscall-tp-fields.c
@@ -96,7 +96,7 @@ int test__syscall_openat_tp_fields(struct test *test __maybe_unused, int subtest
if (perf_mmap__read_init(&md->core) < 0)
continue;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
const u32 type = event->header.type;
int tp_flags;
struct perf_sample sample;
diff --git a/tools/perf/tests/perf-record.c b/tools/perf/tests/perf-record.c
index 92a53be..2195fc2 100644
--- a/tools/perf/tests/perf-record.c
+++ b/tools/perf/tests/perf-record.c
@@ -174,7 +174,7 @@ int test__PERF_RECORD(struct test *test __maybe_unused, int subtest __maybe_unus
if (perf_mmap__read_init(&md->core) < 0)
continue;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
const u32 type = event->header.type;
const char *name = perf_event__name(type);
diff --git a/tools/perf/tests/sw-clock.c b/tools/perf/tests/sw-clock.c
index ace2092..bfb9986 100644
--- a/tools/perf/tests/sw-clock.c
+++ b/tools/perf/tests/sw-clock.c
@@ -103,7 +103,7 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id)
if (perf_mmap__read_init(&md->core) < 0)
goto out_init;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
struct perf_sample sample;
if (event->header.type != PERF_RECORD_SAMPLE)
diff --git a/tools/perf/tests/switch-tracking.c b/tools/perf/tests/switch-tracking.c
index 8400fb1..fcb0d03 100644
--- a/tools/perf/tests/switch-tracking.c
+++ b/tools/perf/tests/switch-tracking.c
@@ -273,7 +273,7 @@ static int process_events(struct evlist *evlist,
if (perf_mmap__read_init(&md->core) < 0)
continue;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
cnt += 1;
ret = add_event(evlist, &events, event);
perf_mmap__consume(&md->core);
diff --git a/tools/perf/tests/task-exit.c b/tools/perf/tests/task-exit.c
index c6a1394..4965f8b 100644
--- a/tools/perf/tests/task-exit.c
+++ b/tools/perf/tests/task-exit.c
@@ -121,7 +121,7 @@ retry:
if (perf_mmap__read_init(&md->core) < 0)
goto out_init;
- while ((event = perf_mmap__read_event(md)) != NULL) {
+ while ((event = perf_mmap__read_event(&md->core)) != NULL) {
if (event->header.type == PERF_RECORD_EXIT)
nr_exit++;
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 6e070ee..a9b189a 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -1811,7 +1811,7 @@ static void *perf_evlist__poll_thread(void *arg)
if (perf_mmap__read_init(&map->core))
continue;
- while ((event = perf_mmap__read_event(map)) != NULL) {
+ while ((event = perf_mmap__read_event(&map->core)) != NULL) {
struct evsel *evsel = perf_evlist__event2evsel(evlist, event);
if (evsel && evsel->side_band.cb)
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index 2dedef9..2a8bf0a 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -29,83 +29,6 @@ size_t mmap__mmap_len(struct mmap *map)
return perf_mmap__mmap_len(&map->core);
}
-/* When check_messup is true, 'end' must points to a good entry */
-static union perf_event *perf_mmap__read(struct mmap *map,
- u64 *startp, u64 end)
-{
- unsigned char *data = map->core.base + page_size;
- union perf_event *event = NULL;
- int diff = end - *startp;
-
- if (diff >= (int)sizeof(event->header)) {
- size_t size;
-
- event = (union perf_event *)&data[*startp & map->core.mask];
- size = event->header.size;
-
- if (size < sizeof(event->header) || diff < (int)size)
- return NULL;
-
- /*
- * Event straddles the mmap boundary -- header should always
- * be inside due to u64 alignment of output.
- */
- if ((*startp & map->core.mask) + size != ((*startp + size) & map->core.mask)) {
- unsigned int offset = *startp;
- unsigned int len = min(sizeof(*event), size), cpy;
- void *dst = map->core.event_copy;
-
- do {
- cpy = min(map->core.mask + 1 - (offset & map->core.mask), len);
- memcpy(dst, &data[offset & map->core.mask], cpy);
- offset += cpy;
- dst += cpy;
- len -= cpy;
- } while (len);
-
- event = (union perf_event *)map->core.event_copy;
- }
-
- *startp += size;
- }
-
- return event;
-}
-
-/*
- * Read event from ring buffer one by one.
- * Return one event for each call.
- *
- * Usage:
- * perf_mmap__read_init()
- * while(event = perf_mmap__read_event()) {
- * //process the event
- * perf_mmap__consume()
- * }
- * perf_mmap__read_done()
- */
-union perf_event *perf_mmap__read_event(struct mmap *map)
-{
- union perf_event *event;
-
- /*
- * Check if event was unmapped due to a POLLHUP/POLLERR.
- */
- if (!refcount_read(&map->core.refcnt))
- return NULL;
-
- /* non-overwirte doesn't pause the ringbuffer */
- if (!map->core.overwrite)
- map->core.end = perf_mmap__read_head(&map->core);
-
- event = perf_mmap__read(map, &map->core.start, map->core.end);
-
- if (!map->core.overwrite)
- map->core.prev = map->core.start;
-
- return event;
-}
-
int __weak auxtrace_mmap__mmap(struct auxtrace_mmap *mm __maybe_unused,
struct auxtrace_mmap_params *mp __maybe_unused,
void *userpg __maybe_unused,
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index 0b15702..bee4e83 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -47,8 +47,6 @@ void mmap__munmap(struct mmap *map);
union perf_event *perf_mmap__read_forward(struct mmap *map);
-union perf_event *perf_mmap__read_event(struct mmap *map);
-
int perf_mmap__push(struct mmap *md, void *to,
int push(struct mmap *map, void *to, void *buf, size_t size));
diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index 64eec2a..2511860 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -1026,7 +1026,7 @@ static PyObject *pyrf_evlist__read_on_cpu(struct pyrf_evlist *pevlist,
if (perf_mmap__read_init(&md->core) < 0)
goto end;
- event = perf_mmap__read_event(md);
+ event = perf_mmap__read_event(&md->core);
if (event != NULL) {
PyObject *pyevent = pyrf_event__new(event);
struct pyrf_event *pevent = (struct pyrf_event *)pyevent;
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [tip: perf/core] libperf: Adopt perf_mmap__read_init() from tools/perf
2019-10-07 12:53 ` [PATCH 10/36] libperf: Add perf_mmap__read_init() function Jiri Olsa
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
0 siblings, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, Arnaldo Carvalho de Melo, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: 7c4d41824f9afc659ba425a41018546531cffd72
Gitweb: https://git.kernel.org/tip/7c4d41824f9afc659ba425a41018546531cffd72
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:18 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 11:45:21 -03:00
libperf: Adopt perf_mmap__read_init() from tools/perf
Move perf_mmap__read_init() from tools/perf to libperf and export it in
perf/mmap.h header.
And add pr_debug2()/pr_debug3() macros support, because the code is
using them.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-11-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/arch/x86/tests/perf-time-to-tsc.c | 2 +-
tools/perf/builtin-kvm.c | 2 +-
tools/perf/builtin-top.c | 2 +-
tools/perf/builtin-trace.c | 2 +-
tools/perf/lib/include/perf/core.h | 2 +-
tools/perf/lib/include/perf/mmap.h | 1 +-
tools/perf/lib/internal.h | 2 +-
tools/perf/lib/libperf.map | 1 +-
tools/perf/lib/mmap.c | 84 +++++++++++++++++++-
tools/perf/tests/backward-ring-buffer.c | 2 +-
tools/perf/tests/bpf.c | 2 +-
tools/perf/tests/code-reading.c | 2 +-
tools/perf/tests/keep-tracking.c | 2 +-
tools/perf/tests/mmap-basic.c | 2 +-
tools/perf/tests/openat-syscall-tp-fields.c | 2 +-
tools/perf/tests/perf-record.c | 2 +-
tools/perf/tests/sw-clock.c | 2 +-
tools/perf/tests/switch-tracking.c | 2 +-
tools/perf/tests/task-exit.c | 2 +-
tools/perf/util/evlist.c | 2 +-
tools/perf/util/mmap.c | 82 +-------------------
tools/perf/util/mmap.h | 1 +-
tools/perf/util/python.c | 2 +-
23 files changed, 107 insertions(+), 98 deletions(-)
diff --git a/tools/perf/arch/x86/tests/perf-time-to-tsc.c b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
index 3397898..6a0c3ff 100644
--- a/tools/perf/arch/x86/tests/perf-time-to-tsc.c
+++ b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
@@ -118,7 +118,7 @@ int test__perf_time_to_tsc(struct test *test __maybe_unused, int subtest __maybe
for (i = 0; i < evlist->core.nr_mmaps; i++) {
md = &evlist->mmap[i];
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
continue;
while ((event = perf_mmap__read_event(md)) != NULL) {
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 0c04c4c..b6a8078 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -760,7 +760,7 @@ static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
*mmap_time = ULLONG_MAX;
md = &evlist->mmap[idx];
- err = perf_mmap__read_init(md);
+ err = perf_mmap__read_init(&md->core);
if (err < 0)
return (err == -EAGAIN) ? 0 : -1;
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 5fcf157..4a4bb7b 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -870,7 +870,7 @@ static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
union perf_event *event;
md = opts->overwrite ? &evlist->overwrite_mmap[idx] : &evlist->mmap[idx];
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
return;
while ((event = perf_mmap__read_event(md)) != NULL) {
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 6a57084..cd69d68 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -3801,7 +3801,7 @@ again:
struct mmap *md;
md = &evlist->mmap[i];
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
continue;
while ((event = perf_mmap__read_event(md)) != NULL) {
diff --git a/tools/perf/lib/include/perf/core.h b/tools/perf/lib/include/perf/core.h
index cfd70e7..2a80e4b 100644
--- a/tools/perf/lib/include/perf/core.h
+++ b/tools/perf/lib/include/perf/core.h
@@ -12,6 +12,8 @@ enum libperf_print_level {
LIBPERF_WARN,
LIBPERF_INFO,
LIBPERF_DEBUG,
+ LIBPERF_DEBUG2,
+ LIBPERF_DEBUG3,
};
typedef int (*libperf_print_fn_t)(enum libperf_print_level level,
diff --git a/tools/perf/lib/include/perf/mmap.h b/tools/perf/lib/include/perf/mmap.h
index d3678d1..646e905 100644
--- a/tools/perf/lib/include/perf/mmap.h
+++ b/tools/perf/lib/include/perf/mmap.h
@@ -7,5 +7,6 @@
struct perf_mmap;
LIBPERF_API void perf_mmap__consume(struct perf_mmap *map);
+LIBPERF_API int perf_mmap__read_init(struct perf_mmap *map);
#endif /* __LIBPERF_MMAP_H */
diff --git a/tools/perf/lib/internal.h b/tools/perf/lib/internal.h
index dc92f24..37db745 100644
--- a/tools/perf/lib/internal.h
+++ b/tools/perf/lib/internal.h
@@ -14,5 +14,7 @@ do { \
#define pr_warning(fmt, ...) __pr(LIBPERF_WARN, fmt, ##__VA_ARGS__)
#define pr_info(fmt, ...) __pr(LIBPERF_INFO, fmt, ##__VA_ARGS__)
#define pr_debug(fmt, ...) __pr(LIBPERF_DEBUG, fmt, ##__VA_ARGS__)
+#define pr_debug2(fmt, ...) __pr(LIBPERF_DEBUG2, fmt, ##__VA_ARGS__)
+#define pr_debug3(fmt, ...) __pr(LIBPERF_DEBUG3, fmt, ##__VA_ARGS__)
#endif /* __LIBPERF_INTERNAL_H */
diff --git a/tools/perf/lib/libperf.map b/tools/perf/lib/libperf.map
index d7b327f..bc3fbb2 100644
--- a/tools/perf/lib/libperf.map
+++ b/tools/perf/lib/libperf.map
@@ -41,6 +41,7 @@ LIBPERF_0.0.1 {
perf_evlist__set_maps;
perf_evlist__poll;
perf_mmap__consume;
+ perf_mmap__read_init;
local:
*;
};
diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
index 4cada1c..fdbc6c5 100644
--- a/tools/perf/lib/mmap.c
+++ b/tools/perf/lib/mmap.c
@@ -1,11 +1,15 @@
// SPDX-License-Identifier: GPL-2.0
#include <sys/mman.h>
+#include <inttypes.h>
+#include <asm/bug.h>
+#include <errno.h>
#include <linux/ring_buffer.h>
#include <linux/perf_event.h>
#include <perf/mmap.h>
#include <internal/mmap.h>
#include <internal/lib.h>
#include <linux/kernel.h>
+#include "internal.h"
void perf_mmap__init(struct perf_mmap *map, bool overwrite,
libperf_unmap_cb_t unmap_cb)
@@ -91,3 +95,83 @@ void perf_mmap__consume(struct perf_mmap *map)
if (refcount_read(&map->refcnt) == 1 && perf_mmap__empty(map))
perf_mmap__put(map);
}
+
+static int overwrite_rb_find_range(void *buf, int mask, u64 *start, u64 *end)
+{
+ struct perf_event_header *pheader;
+ u64 evt_head = *start;
+ int size = mask + 1;
+
+ pr_debug2("%s: buf=%p, start=%"PRIx64"\n", __func__, buf, *start);
+ pheader = (struct perf_event_header *)(buf + (*start & mask));
+ while (true) {
+ if (evt_head - *start >= (unsigned int)size) {
+ pr_debug("Finished reading overwrite ring buffer: rewind\n");
+ if (evt_head - *start > (unsigned int)size)
+ evt_head -= pheader->size;
+ *end = evt_head;
+ return 0;
+ }
+
+ pheader = (struct perf_event_header *)(buf + (evt_head & mask));
+
+ if (pheader->size == 0) {
+ pr_debug("Finished reading overwrite ring buffer: get start\n");
+ *end = evt_head;
+ return 0;
+ }
+
+ evt_head += pheader->size;
+ pr_debug3("move evt_head: %"PRIx64"\n", evt_head);
+ }
+ WARN_ONCE(1, "Shouldn't get here\n");
+ return -1;
+}
+
+/*
+ * Report the start and end of the available data in ringbuffer
+ */
+static int __perf_mmap__read_init(struct perf_mmap *md)
+{
+ u64 head = perf_mmap__read_head(md);
+ u64 old = md->prev;
+ unsigned char *data = md->base + page_size;
+ unsigned long size;
+
+ md->start = md->overwrite ? head : old;
+ md->end = md->overwrite ? old : head;
+
+ if ((md->end - md->start) < md->flush)
+ return -EAGAIN;
+
+ size = md->end - md->start;
+ if (size > (unsigned long)(md->mask) + 1) {
+ if (!md->overwrite) {
+ WARN_ONCE(1, "failed to keep up with mmap data. (warn only once)\n");
+
+ md->prev = head;
+ perf_mmap__consume(md);
+ return -EAGAIN;
+ }
+
+ /*
+ * Backward ring buffer is full. We still have a chance to read
+ * most of data from it.
+ */
+ if (overwrite_rb_find_range(data, md->mask, &md->start, &md->end))
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+int perf_mmap__read_init(struct perf_mmap *map)
+{
+ /*
+ * Check if event was unmapped due to a POLLHUP/POLLERR.
+ */
+ if (!refcount_read(&map->refcnt))
+ return -ENOENT;
+
+ return __perf_mmap__read_init(map);
+}
diff --git a/tools/perf/tests/backward-ring-buffer.c b/tools/perf/tests/backward-ring-buffer.c
index 13f9a06..ff3a986 100644
--- a/tools/perf/tests/backward-ring-buffer.c
+++ b/tools/perf/tests/backward-ring-buffer.c
@@ -38,7 +38,7 @@ static int count_samples(struct evlist *evlist, int *sample_count,
struct mmap *map = &evlist->overwrite_mmap[i];
union perf_event *event;
- perf_mmap__read_init(map);
+ perf_mmap__read_init(&map->core);
while ((event = perf_mmap__read_event(map)) != NULL) {
const u32 type = event->header.type;
diff --git a/tools/perf/tests/bpf.c b/tools/perf/tests/bpf.c
index 6f0d239..73d26c6 100644
--- a/tools/perf/tests/bpf.c
+++ b/tools/perf/tests/bpf.c
@@ -185,7 +185,7 @@ static int do_test(struct bpf_object *obj, int (*func)(void),
struct mmap *md;
md = &evlist->mmap[i];
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
continue;
while ((event = perf_mmap__read_event(md)) != NULL) {
diff --git a/tools/perf/tests/code-reading.c b/tools/perf/tests/code-reading.c
index b5a57bb..cf992e0 100644
--- a/tools/perf/tests/code-reading.c
+++ b/tools/perf/tests/code-reading.c
@@ -426,7 +426,7 @@ static int process_events(struct machine *machine, struct evlist *evlist,
for (i = 0; i < evlist->core.nr_mmaps; i++) {
md = &evlist->mmap[i];
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
continue;
while ((event = perf_mmap__read_event(md)) != NULL) {
diff --git a/tools/perf/tests/keep-tracking.c b/tools/perf/tests/keep-tracking.c
index 31c005e..e85da7e 100644
--- a/tools/perf/tests/keep-tracking.c
+++ b/tools/perf/tests/keep-tracking.c
@@ -39,7 +39,7 @@ static int find_comm(struct evlist *evlist, const char *comm)
found = 0;
for (i = 0; i < evlist->core.nr_mmaps; i++) {
md = &evlist->mmap[i];
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
continue;
while ((event = perf_mmap__read_event(md)) != NULL) {
if (event->header.type == PERF_RECORD_COMM &&
diff --git a/tools/perf/tests/mmap-basic.c b/tools/perf/tests/mmap-basic.c
index b176acc..77f42f0 100644
--- a/tools/perf/tests/mmap-basic.c
+++ b/tools/perf/tests/mmap-basic.c
@@ -114,7 +114,7 @@ int test__basic_mmap(struct test *test __maybe_unused, int subtest __maybe_unuse
}
md = &evlist->mmap[0];
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
goto out_init;
while ((event = perf_mmap__read_event(md)) != NULL) {
diff --git a/tools/perf/tests/openat-syscall-tp-fields.c b/tools/perf/tests/openat-syscall-tp-fields.c
index bbf8ba3..d6a5631 100644
--- a/tools/perf/tests/openat-syscall-tp-fields.c
+++ b/tools/perf/tests/openat-syscall-tp-fields.c
@@ -93,7 +93,7 @@ int test__syscall_openat_tp_fields(struct test *test __maybe_unused, int subtest
struct mmap *md;
md = &evlist->mmap[i];
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
continue;
while ((event = perf_mmap__read_event(md)) != NULL) {
diff --git a/tools/perf/tests/perf-record.c b/tools/perf/tests/perf-record.c
index 6ebbcc6..2587cb8 100644
--- a/tools/perf/tests/perf-record.c
+++ b/tools/perf/tests/perf-record.c
@@ -171,7 +171,7 @@ int test__PERF_RECORD(struct test *test __maybe_unused, int subtest __maybe_unus
struct mmap *md;
md = &evlist->mmap[i];
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
continue;
while ((event = perf_mmap__read_event(md)) != NULL) {
diff --git a/tools/perf/tests/sw-clock.c b/tools/perf/tests/sw-clock.c
index 1aeb558..8086695 100644
--- a/tools/perf/tests/sw-clock.c
+++ b/tools/perf/tests/sw-clock.c
@@ -100,7 +100,7 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id)
evlist__disable(evlist);
md = &evlist->mmap[0];
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
goto out_init;
while ((event = perf_mmap__read_event(md)) != NULL) {
diff --git a/tools/perf/tests/switch-tracking.c b/tools/perf/tests/switch-tracking.c
index 55728b3..bedfdec 100644
--- a/tools/perf/tests/switch-tracking.c
+++ b/tools/perf/tests/switch-tracking.c
@@ -270,7 +270,7 @@ static int process_events(struct evlist *evlist,
for (i = 0; i < evlist->core.nr_mmaps; i++) {
md = &evlist->mmap[i];
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
continue;
while ((event = perf_mmap__read_event(md)) != NULL) {
diff --git a/tools/perf/tests/task-exit.c b/tools/perf/tests/task-exit.c
index a0f6895..035d423 100644
--- a/tools/perf/tests/task-exit.c
+++ b/tools/perf/tests/task-exit.c
@@ -118,7 +118,7 @@ int test__task_exit(struct test *test __maybe_unused, int subtest __maybe_unused
retry:
md = &evlist->mmap[0];
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
goto out_init;
while ((event = perf_mmap__read_event(md)) != NULL) {
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 34ba47b..d9a4a4b 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -1809,7 +1809,7 @@ static void *perf_evlist__poll_thread(void *arg)
struct mmap *map = &evlist->mmap[i];
union perf_event *event;
- if (perf_mmap__read_init(map))
+ if (perf_mmap__read_init(&map->core))
continue;
while ((event = perf_mmap__read_event(map)) != NULL) {
struct evsel *evsel = perf_evlist__event2evsel(evlist, event);
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index abe7cbe..5937911 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -365,86 +365,6 @@ int mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu)
return perf_mmap__aio_mmap(map, mp);
}
-static int overwrite_rb_find_range(void *buf, int mask, u64 *start, u64 *end)
-{
- struct perf_event_header *pheader;
- u64 evt_head = *start;
- int size = mask + 1;
-
- pr_debug2("%s: buf=%p, start=%"PRIx64"\n", __func__, buf, *start);
- pheader = (struct perf_event_header *)(buf + (*start & mask));
- while (true) {
- if (evt_head - *start >= (unsigned int)size) {
- pr_debug("Finished reading overwrite ring buffer: rewind\n");
- if (evt_head - *start > (unsigned int)size)
- evt_head -= pheader->size;
- *end = evt_head;
- return 0;
- }
-
- pheader = (struct perf_event_header *)(buf + (evt_head & mask));
-
- if (pheader->size == 0) {
- pr_debug("Finished reading overwrite ring buffer: get start\n");
- *end = evt_head;
- return 0;
- }
-
- evt_head += pheader->size;
- pr_debug3("move evt_head: %"PRIx64"\n", evt_head);
- }
- WARN_ONCE(1, "Shouldn't get here\n");
- return -1;
-}
-
-/*
- * Report the start and end of the available data in ringbuffer
- */
-static int __perf_mmap__read_init(struct mmap *md)
-{
- u64 head = perf_mmap__read_head(&md->core);
- u64 old = md->core.prev;
- unsigned char *data = md->core.base + page_size;
- unsigned long size;
-
- md->core.start = md->core.overwrite ? head : old;
- md->core.end = md->core.overwrite ? old : head;
-
- if ((md->core.end - md->core.start) < md->core.flush)
- return -EAGAIN;
-
- size = md->core.end - md->core.start;
- if (size > (unsigned long)(md->core.mask) + 1) {
- if (!md->core.overwrite) {
- WARN_ONCE(1, "failed to keep up with mmap data. (warn only once)\n");
-
- md->core.prev = head;
- perf_mmap__consume(&md->core);
- return -EAGAIN;
- }
-
- /*
- * Backward ring buffer is full. We still have a chance to read
- * most of data from it.
- */
- if (overwrite_rb_find_range(data, md->core.mask, &md->core.start, &md->core.end))
- return -EINVAL;
- }
-
- return 0;
-}
-
-int perf_mmap__read_init(struct mmap *map)
-{
- /*
- * Check if event was unmapped due to a POLLHUP/POLLERR.
- */
- if (!refcount_read(&map->core.refcnt))
- return -ENOENT;
-
- return __perf_mmap__read_init(map);
-}
-
int perf_mmap__push(struct mmap *md, void *to,
int push(struct mmap *map, void *to, void *buf, size_t size))
{
@@ -454,7 +374,7 @@ int perf_mmap__push(struct mmap *md, void *to,
void *buf;
int rc = 0;
- rc = perf_mmap__read_init(md);
+ rc = perf_mmap__read_init(&md->core);
if (rc < 0)
return (rc == -EAGAIN) ? 1 : -1;
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index 89fb932..6d818ef 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -54,6 +54,5 @@ int perf_mmap__push(struct mmap *md, void *to,
size_t mmap__mmap_len(struct mmap *map);
-int perf_mmap__read_init(struct mmap *md);
void perf_mmap__read_done(struct mmap *map);
#endif /*__PERF_MMAP_H */
diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index 82a4fa6..64eec2a 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -1023,7 +1023,7 @@ static PyObject *pyrf_evlist__read_on_cpu(struct pyrf_evlist *pevlist,
if (!md)
return NULL;
- if (perf_mmap__read_init(md) < 0)
+ if (perf_mmap__read_init(&md->core) < 0)
goto end;
event = perf_mmap__read_event(md);
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [tip: perf/core] libperf: Adopt perf_mmap__consume() function from tools/perf
2019-10-07 12:53 ` [PATCH 09/36] libperf: Add perf_mmap__consume() function Jiri Olsa
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
0 siblings, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, Arnaldo Carvalho de Melo, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: 7728fa0cfaeb7d25b12c8865c733359cc8e5fb13
Gitweb: https://git.kernel.org/tip/7728fa0cfaeb7d25b12c8865c733359cc8e5fb13
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:17 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 11:43:49 -03:00
libperf: Adopt perf_mmap__consume() function from tools/perf
Move perf_mmap__consume() vrom tools/perf to libperf and export it in
the perf/mmap.h header.
Move also the needed helpers perf_mmap__write_tail(),
perf_mmap__read_head() and perf_mmap__empty().
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-10-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/arch/x86/tests/perf-time-to-tsc.c | 3 +-
tools/perf/builtin-kvm.c | 5 +--
tools/perf/builtin-top.c | 3 +-
tools/perf/builtin-trace.c | 3 +-
tools/perf/lib/Makefile | 5 +--
tools/perf/lib/include/internal/mmap.h | 2 +-
tools/perf/lib/include/perf/mmap.h | 11 +++++++-
tools/perf/lib/libperf.map | 1 +-
tools/perf/lib/mmap.c | 32 +++++++++++++++++++-
tools/perf/tests/backward-ring-buffer.c | 1 +-
tools/perf/tests/bpf.c | 1 +-
tools/perf/tests/code-reading.c | 3 +-
tools/perf/tests/keep-tracking.c | 3 +-
tools/perf/tests/mmap-basic.c | 3 +-
tools/perf/tests/openat-syscall-tp-fields.c | 3 +-
tools/perf/tests/perf-record.c | 3 +-
tools/perf/tests/sw-clock.c | 3 +-
tools/perf/tests/switch-tracking.c | 3 +-
tools/perf/tests/task-exit.c | 3 +-
tools/perf/util/evlist.c | 3 +-
tools/perf/util/mmap.c | 32 ++++---------------
tools/perf/util/mmap.h | 12 +-------
tools/perf/util/python.c | 3 +-
23 files changed, 87 insertions(+), 54 deletions(-)
create mode 100644 tools/perf/lib/include/perf/mmap.h
diff --git a/tools/perf/arch/x86/tests/perf-time-to-tsc.c b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
index fa94795..3397898 100644
--- a/tools/perf/arch/x86/tests/perf-time-to-tsc.c
+++ b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
@@ -9,6 +9,7 @@
#include <sys/prctl.h>
#include <perf/cpumap.h>
#include <perf/evlist.h>
+#include <perf/mmap.h>
#include "debug.h"
#include "parse-events.h"
@@ -139,7 +140,7 @@ int test__perf_time_to_tsc(struct test *test __maybe_unused, int subtest __maybe
comm2_time = sample.time;
}
next_event:
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
}
perf_mmap__read_done(md);
}
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 58a9e09..0c04c4c 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -46,6 +46,7 @@
#include <semaphore.h>
#include <signal.h>
#include <math.h>
+#include <perf/mmap.h>
static const char *get_filename_for_perf_kvm(void)
{
@@ -766,7 +767,7 @@ static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
while ((event = perf_mmap__read_event(md)) != NULL) {
err = perf_evlist__parse_sample_timestamp(evlist, event, ×tamp);
if (err) {
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
pr_err("Failed to parse sample\n");
return -1;
}
@@ -776,7 +777,7 @@ static s64 perf_kvm__mmap_read_idx(struct perf_kvm_stat *kvm, int idx,
* FIXME: Here we can't consume the event, as perf_session__queue_event will
* point to it, and it'll get possibly overwritten by the kernel.
*/
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
if (err) {
pr_err("Failed to enqueue sample: %d\n", err);
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 611d030..5fcf157 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -82,6 +82,7 @@
#include <linux/err.h>
#include <linux/ctype.h>
+#include <perf/mmap.h>
static volatile int done;
static volatile int resize;
@@ -883,7 +884,7 @@ static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
if (ret)
break;
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
if (top->qe.rotate) {
pthread_mutex_lock(&top->qe.mutex);
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index b627975..6a57084 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -77,6 +77,7 @@
#include <sys/sysmacros.h>
#include <linux/ctype.h>
+#include <perf/mmap.h>
#ifndef O_CLOEXEC
# define O_CLOEXEC 02000000
@@ -3810,7 +3811,7 @@ again:
if (err)
goto out_disable;
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
if (interrupted)
goto out_disable;
diff --git a/tools/perf/lib/Makefile b/tools/perf/lib/Makefile
index 85ccb8c..0889c9c 100644
--- a/tools/perf/lib/Makefile
+++ b/tools/perf/lib/Makefile
@@ -172,8 +172,9 @@ install_headers:
$(call do_install,include/perf/cpumap.h,$(prefix)/include/perf,644); \
$(call do_install,include/perf/threadmap.h,$(prefix)/include/perf,644); \
$(call do_install,include/perf/evlist.h,$(prefix)/include/perf,644); \
- $(call do_install,include/perf/evsel.h,$(prefix)/include/perf,644);
- $(call do_install,include/perf/event.h,$(prefix)/include/perf,644);
+ $(call do_install,include/perf/evsel.h,$(prefix)/include/perf,644); \
+ $(call do_install,include/perf/event.h,$(prefix)/include/perf,644); \
+ $(call do_install,include/perf/mmap.h,$(prefix)/include/perf,644);
install_pkgconfig: $(LIBPERF_PC)
$(call QUIET_INSTALL, $(LIBPERF_PC)) \
diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
index bf9cc7d..ee536c4 100644
--- a/tools/perf/lib/include/internal/mmap.h
+++ b/tools/perf/lib/include/internal/mmap.h
@@ -49,4 +49,6 @@ void perf_mmap__munmap(struct perf_mmap *map);
void perf_mmap__get(struct perf_mmap *map);
void perf_mmap__put(struct perf_mmap *map);
+u64 perf_mmap__read_head(struct perf_mmap *map);
+
#endif /* __LIBPERF_INTERNAL_MMAP_H */
diff --git a/tools/perf/lib/include/perf/mmap.h b/tools/perf/lib/include/perf/mmap.h
new file mode 100644
index 0000000..d3678d1
--- /dev/null
+++ b/tools/perf/lib/include/perf/mmap.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LIBPERF_MMAP_H
+#define __LIBPERF_MMAP_H
+
+#include <perf/core.h>
+
+struct perf_mmap;
+
+LIBPERF_API void perf_mmap__consume(struct perf_mmap *map);
+
+#endif /* __LIBPERF_MMAP_H */
diff --git a/tools/perf/lib/libperf.map b/tools/perf/lib/libperf.map
index ab8dbde..d7b327f 100644
--- a/tools/perf/lib/libperf.map
+++ b/tools/perf/lib/libperf.map
@@ -40,6 +40,7 @@ LIBPERF_0.0.1 {
perf_evlist__next;
perf_evlist__set_maps;
perf_evlist__poll;
+ perf_mmap__consume;
local:
*;
};
diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
index 89c1e0e..4cada1c 100644
--- a/tools/perf/lib/mmap.c
+++ b/tools/perf/lib/mmap.c
@@ -1,5 +1,8 @@
// SPDX-License-Identifier: GPL-2.0
#include <sys/mman.h>
+#include <linux/ring_buffer.h>
+#include <linux/perf_event.h>
+#include <perf/mmap.h>
#include <internal/mmap.h>
#include <internal/lib.h>
#include <linux/kernel.h>
@@ -59,3 +62,32 @@ void perf_mmap__put(struct perf_mmap *map)
if (refcount_dec_and_test(&map->refcnt))
perf_mmap__munmap(map);
}
+
+static inline void perf_mmap__write_tail(struct perf_mmap *md, u64 tail)
+{
+ ring_buffer_write_tail(md->base, tail);
+}
+
+u64 perf_mmap__read_head(struct perf_mmap *map)
+{
+ return ring_buffer_read_head(map->base);
+}
+
+static bool perf_mmap__empty(struct perf_mmap *map)
+{
+ struct perf_event_mmap_page *pc = map->base;
+
+ return perf_mmap__read_head(map) == map->prev && !pc->aux_size;
+}
+
+void perf_mmap__consume(struct perf_mmap *map)
+{
+ if (!map->overwrite) {
+ u64 old = map->prev;
+
+ perf_mmap__write_tail(map, old);
+ }
+
+ if (refcount_read(&map->refcnt) == 1 && perf_mmap__empty(map))
+ perf_mmap__put(map);
+}
diff --git a/tools/perf/tests/backward-ring-buffer.c b/tools/perf/tests/backward-ring-buffer.c
index 338cd9f..13f9a06 100644
--- a/tools/perf/tests/backward-ring-buffer.c
+++ b/tools/perf/tests/backward-ring-buffer.c
@@ -13,6 +13,7 @@
#include "util/mmap.h"
#include <errno.h>
#include <linux/string.h>
+#include <perf/mmap.h>
#define NR_ITERS 111
diff --git a/tools/perf/tests/bpf.c b/tools/perf/tests/bpf.c
index 1eb0bff..6f0d239 100644
--- a/tools/perf/tests/bpf.c
+++ b/tools/perf/tests/bpf.c
@@ -15,6 +15,7 @@
#include <linux/string.h>
#include <api/fs/fs.h>
#include <bpf/bpf.h>
+#include <perf/mmap.h>
#include "tests.h"
#include "llvm.h"
#include "debug.h"
diff --git a/tools/perf/tests/code-reading.c b/tools/perf/tests/code-reading.c
index f5764a3..b5a57bb 100644
--- a/tools/perf/tests/code-reading.c
+++ b/tools/perf/tests/code-reading.c
@@ -10,6 +10,7 @@
#include <sys/param.h>
#include <perf/cpumap.h>
#include <perf/evlist.h>
+#include <perf/mmap.h>
#include "debug.h"
#include "dso.h"
@@ -430,7 +431,7 @@ static int process_events(struct machine *machine, struct evlist *evlist,
while ((event = perf_mmap__read_event(md)) != NULL) {
ret = process_event(machine, evlist, event, state);
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
if (ret < 0)
return ret;
}
diff --git a/tools/perf/tests/keep-tracking.c b/tools/perf/tests/keep-tracking.c
index 92c7d59..31c005e 100644
--- a/tools/perf/tests/keep-tracking.c
+++ b/tools/perf/tests/keep-tracking.c
@@ -5,6 +5,7 @@
#include <sys/prctl.h>
#include <perf/cpumap.h>
#include <perf/evlist.h>
+#include <perf/mmap.h>
#include "debug.h"
#include "parse-events.h"
@@ -46,7 +47,7 @@ static int find_comm(struct evlist *evlist, const char *comm)
(pid_t)event->comm.tid == getpid() &&
strcmp(event->comm.comm, comm) == 0)
found += 1;
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
}
perf_mmap__read_done(md);
}
diff --git a/tools/perf/tests/mmap-basic.c b/tools/perf/tests/mmap-basic.c
index 3a22dce..b176acc 100644
--- a/tools/perf/tests/mmap-basic.c
+++ b/tools/perf/tests/mmap-basic.c
@@ -16,6 +16,7 @@
#include <linux/kernel.h>
#include <linux/string.h>
#include <perf/evlist.h>
+#include <perf/mmap.h>
/*
* This test will generate random numbers of calls to some getpid syscalls,
@@ -139,7 +140,7 @@ int test__basic_mmap(struct test *test __maybe_unused, int subtest __maybe_unuse
goto out_delete_evlist;
}
nr_events[evsel->idx]++;
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
}
perf_mmap__read_done(md);
diff --git a/tools/perf/tests/openat-syscall-tp-fields.c b/tools/perf/tests/openat-syscall-tp-fields.c
index 2b5c468..bbf8ba3 100644
--- a/tools/perf/tests/openat-syscall-tp-fields.c
+++ b/tools/perf/tests/openat-syscall-tp-fields.c
@@ -13,6 +13,7 @@
#include "debug.h"
#include "util/mmap.h"
#include <errno.h>
+#include <perf/mmap.h>
#ifndef O_DIRECTORY
#define O_DIRECTORY 00200000
@@ -103,7 +104,7 @@ int test__syscall_openat_tp_fields(struct test *test __maybe_unused, int subtest
++nr_events;
if (type != PERF_RECORD_SAMPLE) {
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
continue;
}
diff --git a/tools/perf/tests/perf-record.c b/tools/perf/tests/perf-record.c
index 437426b..6ebbcc6 100644
--- a/tools/perf/tests/perf-record.c
+++ b/tools/perf/tests/perf-record.c
@@ -6,6 +6,7 @@
#include <pthread.h>
#include <sched.h>
+#include <perf/mmap.h>
#include "evlist.h"
#include "evsel.h"
#include "debug.h"
@@ -276,7 +277,7 @@ int test__PERF_RECORD(struct test *test __maybe_unused, int subtest __maybe_unus
++errs;
}
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
}
perf_mmap__read_done(md);
}
diff --git a/tools/perf/tests/sw-clock.c b/tools/perf/tests/sw-clock.c
index 84519df..1aeb558 100644
--- a/tools/perf/tests/sw-clock.c
+++ b/tools/perf/tests/sw-clock.c
@@ -15,6 +15,7 @@
#include "util/mmap.h"
#include "util/thread_map.h"
#include <perf/evlist.h>
+#include <perf/mmap.h>
#define NR_LOOPS 10000000
@@ -117,7 +118,7 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id)
total_periods += sample.period;
nr_samples++;
next_event:
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
}
perf_mmap__read_done(md);
diff --git a/tools/perf/tests/switch-tracking.c b/tools/perf/tests/switch-tracking.c
index ffa592e..55728b3 100644
--- a/tools/perf/tests/switch-tracking.c
+++ b/tools/perf/tests/switch-tracking.c
@@ -8,6 +8,7 @@
#include <linux/zalloc.h>
#include <perf/cpumap.h>
#include <perf/evlist.h>
+#include <perf/mmap.h>
#include "debug.h"
#include "parse-events.h"
@@ -275,7 +276,7 @@ static int process_events(struct evlist *evlist,
while ((event = perf_mmap__read_event(md)) != NULL) {
cnt += 1;
ret = add_event(evlist, &events, event);
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
if (ret < 0)
goto out_free_nodes;
}
diff --git a/tools/perf/tests/task-exit.c b/tools/perf/tests/task-exit.c
index bce3a4c..a0f6895 100644
--- a/tools/perf/tests/task-exit.c
+++ b/tools/perf/tests/task-exit.c
@@ -12,6 +12,7 @@
#include <linux/string.h>
#include <perf/cpumap.h>
#include <perf/evlist.h>
+#include <perf/mmap.h>
static int exited;
static int nr_exit;
@@ -124,7 +125,7 @@ retry:
if (event->header.type == PERF_RECORD_EXIT)
nr_exit++;
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
}
perf_mmap__read_done(md);
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 4394a5a..34ba47b 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -42,6 +42,7 @@
#include <perf/evlist.h>
#include <perf/evsel.h>
#include <perf/cpumap.h>
+#include <perf/mmap.h>
#include <internal/xyarray.h>
@@ -1818,7 +1819,7 @@ static void *perf_evlist__poll_thread(void *arg)
else
pr_warning("cannot locate proper evsel for the side band event\n");
- perf_mmap__consume(map);
+ perf_mmap__consume(&map->core);
got_data = true;
}
perf_mmap__read_done(map);
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index f246dd4..abe7cbe 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -13,6 +13,7 @@
#include <stdlib.h>
#include <string.h>
#include <unistd.h> // sysconf()
+#include <perf/mmap.h>
#ifdef HAVE_LIBNUMA_SUPPORT
#include <numaif.h>
#endif
@@ -95,7 +96,7 @@ union perf_event *perf_mmap__read_event(struct mmap *map)
/* non-overwirte doesn't pause the ringbuffer */
if (!map->core.overwrite)
- map->core.end = perf_mmap__read_head(map);
+ map->core.end = perf_mmap__read_head(&map->core);
event = perf_mmap__read(map, &map->core.start, map->core.end);
@@ -105,25 +106,6 @@ union perf_event *perf_mmap__read_event(struct mmap *map)
return event;
}
-static bool perf_mmap__empty(struct mmap *map)
-{
- struct perf_event_mmap_page *pc = map->core.base;
-
- return perf_mmap__read_head(map) == map->core.prev && !pc->aux_size;
-}
-
-void perf_mmap__consume(struct mmap *map)
-{
- if (!map->core.overwrite) {
- u64 old = map->core.prev;
-
- perf_mmap__write_tail(map, old);
- }
-
- if (refcount_read(&map->core.refcnt) == 1 && perf_mmap__empty(map))
- perf_mmap__put(&map->core);
-}
-
int __weak auxtrace_mmap__mmap(struct auxtrace_mmap *mm __maybe_unused,
struct auxtrace_mmap_params *mp __maybe_unused,
void *userpg __maybe_unused,
@@ -420,7 +402,7 @@ static int overwrite_rb_find_range(void *buf, int mask, u64 *start, u64 *end)
*/
static int __perf_mmap__read_init(struct mmap *md)
{
- u64 head = perf_mmap__read_head(md);
+ u64 head = perf_mmap__read_head(&md->core);
u64 old = md->core.prev;
unsigned char *data = md->core.base + page_size;
unsigned long size;
@@ -437,7 +419,7 @@ static int __perf_mmap__read_init(struct mmap *md)
WARN_ONCE(1, "failed to keep up with mmap data. (warn only once)\n");
md->core.prev = head;
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
return -EAGAIN;
}
@@ -466,7 +448,7 @@ int perf_mmap__read_init(struct mmap *map)
int perf_mmap__push(struct mmap *md, void *to,
int push(struct mmap *map, void *to, void *buf, size_t size))
{
- u64 head = perf_mmap__read_head(md);
+ u64 head = perf_mmap__read_head(&md->core);
unsigned char *data = md->core.base + page_size;
unsigned long size;
void *buf;
@@ -499,7 +481,7 @@ int perf_mmap__push(struct mmap *md, void *to,
}
md->core.prev = head;
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
out:
return rc;
}
@@ -518,5 +500,5 @@ void perf_mmap__read_done(struct mmap *map)
if (!refcount_read(&map->core.refcnt))
return;
- map->core.prev = perf_mmap__read_head(map);
+ map->core.prev = perf_mmap__read_head(&map->core);
}
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index 78e3c44..89fb932 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -45,18 +45,6 @@ struct mmap_params {
int mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu);
void mmap__munmap(struct mmap *map);
-void perf_mmap__consume(struct mmap *map);
-
-static inline u64 perf_mmap__read_head(struct mmap *mm)
-{
- return ring_buffer_read_head(mm->core.base);
-}
-
-static inline void perf_mmap__write_tail(struct mmap *md, u64 tail)
-{
- ring_buffer_write_tail(md->core.base, tail);
-}
-
union perf_event *perf_mmap__read_forward(struct mmap *map);
union perf_event *perf_mmap__read_event(struct mmap *map);
diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index 0246036..82a4fa6 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -6,6 +6,7 @@
#include <linux/err.h>
#include <perf/cpumap.h>
#include <traceevent/event-parse.h>
+#include <perf/mmap.h>
#include "evlist.h"
#include "callchain.h"
#include "evsel.h"
@@ -1045,7 +1046,7 @@ static PyObject *pyrf_evlist__read_on_cpu(struct pyrf_evlist *pevlist,
err = perf_evsel__parse_sample(evsel, event, &pevent->sample);
/* Consume the even only after we parsed it out. */
- perf_mmap__consume(md);
+ perf_mmap__consume(&md->core);
if (err)
return PyErr_Format(PyExc_OSError,
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [tip: perf/core] libperf: Adopt perf_evlist__mmap()/munmap() from tools/perf
2019-10-07 12:53 ` [PATCH 13/36] libperf: Add perf_evlist__mmap()/munmap() functions Jiri Olsa
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
0 siblings, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, Arnaldo Carvalho de Melo, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: d1a177595b3a824c72dacb0f9d1a4e5906eaef0e
Gitweb: https://git.kernel.org/tip/d1a177595b3a824c72dacb0f9d1a4e5906eaef0e
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:21 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 12:15:58 -03:00
libperf: Adopt perf_evlist__mmap()/munmap() from tools/perf
Add libperf's version of perf_evlist__mmap()/munmap() functions and
exporting them in the perf/evlist.h header.
It's the backbone of what we have in perf code. The following changes
will add needed callbacks and then we'll finally switch the perf code to
use libperf's version.
Add mmap/mmap_ovw 'struct perf_mmap' object arrays to hold maps for
libperf's evlist.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-14-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/lib/evlist.c | 236 ++++++++++++++++++++++-
tools/perf/lib/include/internal/evlist.h | 2 +-
tools/perf/lib/include/perf/evlist.h | 3 +-
tools/perf/lib/libperf.map | 2 +-
4 files changed, 243 insertions(+)
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index d1496fe..250ad57 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -8,13 +8,20 @@
#include <internal/evlist.h>
#include <internal/evsel.h>
#include <internal/xyarray.h>
+#include <internal/mmap.h>
+#include <internal/cpumap.h>
+#include <internal/threadmap.h>
+#include <internal/xyarray.h>
+#include <internal/lib.h>
#include <linux/zalloc.h>
+#include <sys/ioctl.h>
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <poll.h>
+#include <sys/mman.h>
#include <perf/cpumap.h>
#include <perf/threadmap.h>
#include <api/fd/array.h>
@@ -103,6 +110,10 @@ perf_evlist__next(struct perf_evlist *evlist, struct perf_evsel *prev)
void perf_evlist__delete(struct perf_evlist *evlist)
{
+ if (evlist == NULL)
+ return;
+
+ perf_evlist__munmap(evlist);
free(evlist);
}
@@ -281,3 +292,228 @@ int perf_evlist__poll(struct perf_evlist *evlist, int timeout)
{
return fdarray__poll(&evlist->pollfd, timeout);
}
+
+static struct perf_mmap* perf_evlist__alloc_mmap(struct perf_evlist *evlist, bool overwrite)
+{
+ int i;
+ struct perf_mmap *map;
+
+ evlist->nr_mmaps = perf_cpu_map__nr(evlist->cpus);
+ if (perf_cpu_map__empty(evlist->cpus))
+ evlist->nr_mmaps = perf_thread_map__nr(evlist->threads);
+
+ map = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap));
+ if (!map)
+ return NULL;
+
+ for (i = 0; i < evlist->nr_mmaps; i++) {
+ /*
+ * When the perf_mmap() call is made we grab one refcount, plus
+ * one extra to let perf_mmap__consume() get the last
+ * events after all real references (perf_mmap__get()) are
+ * dropped.
+ *
+ * Each PERF_EVENT_IOC_SET_OUTPUT points to this mmap and
+ * thus does perf_mmap__get() on it.
+ */
+ perf_mmap__init(&map[i], overwrite, NULL);
+ }
+
+ return map;
+}
+
+static void perf_evlist__set_sid_idx(struct perf_evlist *evlist,
+ struct perf_evsel *evsel, int idx, int cpu,
+ int thread)
+{
+ struct perf_sample_id *sid = SID(evsel, cpu, thread);
+
+ sid->idx = idx;
+ if (evlist->cpus && cpu >= 0)
+ sid->cpu = evlist->cpus->map[cpu];
+ else
+ sid->cpu = -1;
+ if (!evsel->system_wide && evlist->threads && thread >= 0)
+ sid->tid = perf_thread_map__pid(evlist->threads, thread);
+ else
+ sid->tid = -1;
+}
+
+static struct perf_mmap*
+perf_evlist__map_get(struct perf_evlist *evlist, bool overwrite, int idx)
+{
+ struct perf_mmap *map = &evlist->mmap[idx];
+
+ if (overwrite) {
+ if (!evlist->mmap_ovw) {
+ evlist->mmap_ovw = perf_evlist__alloc_mmap(evlist, true);
+ if (!evlist->mmap_ovw)
+ return NULL;
+ }
+ map = &evlist->mmap_ovw[idx];
+ }
+
+ return map;
+}
+
+#define FD(e, x, y) (*(int *) xyarray__entry(e->fd, x, y))
+
+static int
+mmap_per_evsel(struct perf_evlist *evlist, int idx,
+ struct perf_mmap_param *mp, int cpu_idx,
+ int thread, int *_output, int *_output_overwrite)
+{
+ int evlist_cpu = perf_cpu_map__cpu(evlist->cpus, cpu_idx);
+ struct perf_evsel *evsel;
+ int revent;
+
+ perf_evlist__for_each_entry(evlist, evsel) {
+ bool overwrite = evsel->attr.write_backward;
+ struct perf_mmap *map;
+ int *output, fd, cpu;
+
+ if (evsel->system_wide && thread)
+ continue;
+
+ cpu = perf_cpu_map__idx(evsel->cpus, evlist_cpu);
+ if (cpu == -1)
+ continue;
+
+ map = perf_evlist__map_get(evlist, overwrite, idx);
+ if (map == NULL)
+ return -ENOMEM;
+
+ if (overwrite) {
+ mp->prot = PROT_READ;
+ output = _output_overwrite;
+ } else {
+ mp->prot = PROT_READ | PROT_WRITE;
+ output = _output;
+ }
+
+ fd = FD(evsel, cpu, thread);
+
+ if (*output == -1) {
+ *output = fd;
+
+ if (perf_mmap__mmap(map, mp, *output, evlist_cpu) < 0)
+ return -1;
+ } else {
+ if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0)
+ return -1;
+
+ perf_mmap__get(map);
+ }
+
+ revent = !overwrite ? POLLIN : 0;
+
+ if (!evsel->system_wide &&
+ perf_evlist__add_pollfd(evlist, fd, map, revent) < 0) {
+ perf_mmap__put(map);
+ return -1;
+ }
+
+ if (evsel->attr.read_format & PERF_FORMAT_ID) {
+ if (perf_evlist__id_add_fd(evlist, evsel, cpu, thread,
+ fd) < 0)
+ return -1;
+ perf_evlist__set_sid_idx(evlist, evsel, idx, cpu,
+ thread);
+ }
+ }
+
+ return 0;
+}
+
+static int
+mmap_per_thread(struct perf_evlist *evlist, struct perf_mmap_param *mp)
+{
+ int thread;
+ int nr_threads = perf_thread_map__nr(evlist->threads);
+
+ for (thread = 0; thread < nr_threads; thread++) {
+ int output = -1;
+ int output_overwrite = -1;
+
+ if (mmap_per_evsel(evlist, thread, mp, 0, thread,
+ &output, &output_overwrite))
+ goto out_unmap;
+ }
+
+ return 0;
+
+out_unmap:
+ perf_evlist__munmap(evlist);
+ return -1;
+}
+
+static int
+mmap_per_cpu(struct perf_evlist *evlist, struct perf_mmap_param *mp)
+{
+ int nr_threads = perf_thread_map__nr(evlist->threads);
+ int nr_cpus = perf_cpu_map__nr(evlist->cpus);
+ int cpu, thread;
+
+ for (cpu = 0; cpu < nr_cpus; cpu++) {
+ int output = -1;
+ int output_overwrite = -1;
+
+ for (thread = 0; thread < nr_threads; thread++) {
+ if (mmap_per_evsel(evlist, cpu, mp, cpu,
+ thread, &output, &output_overwrite))
+ goto out_unmap;
+ }
+ }
+
+ return 0;
+
+out_unmap:
+ perf_evlist__munmap(evlist);
+ return -1;
+}
+
+int perf_evlist__mmap(struct perf_evlist *evlist, int pages)
+{
+ struct perf_evsel *evsel;
+ const struct perf_cpu_map *cpus = evlist->cpus;
+ const struct perf_thread_map *threads = evlist->threads;
+ struct perf_mmap_param mp;
+
+ if (!evlist->mmap)
+ evlist->mmap = perf_evlist__alloc_mmap(evlist, false);
+ if (!evlist->mmap)
+ return -ENOMEM;
+
+ perf_evlist__for_each_entry(evlist, evsel) {
+ if ((evsel->attr.read_format & PERF_FORMAT_ID) &&
+ evsel->sample_id == NULL &&
+ perf_evsel__alloc_id(evsel, perf_cpu_map__nr(cpus), threads->nr) < 0)
+ return -ENOMEM;
+ }
+
+ evlist->mmap_len = (pages + 1) * page_size;
+ mp.mask = evlist->mmap_len - page_size - 1;
+
+ if (perf_cpu_map__empty(cpus))
+ return mmap_per_thread(evlist, &mp);
+
+ return mmap_per_cpu(evlist, &mp);
+}
+
+void perf_evlist__munmap(struct perf_evlist *evlist)
+{
+ int i;
+
+ if (evlist->mmap) {
+ for (i = 0; i < evlist->nr_mmaps; i++)
+ perf_mmap__munmap(&evlist->mmap[i]);
+ }
+
+ if (evlist->mmap_ovw) {
+ for (i = 0; i < evlist->nr_mmaps; i++)
+ perf_mmap__munmap(&evlist->mmap_ovw[i]);
+ }
+
+ zfree(&evlist->mmap);
+ zfree(&evlist->mmap_ovw);
+}
diff --git a/tools/perf/lib/include/internal/evlist.h b/tools/perf/lib/include/internal/evlist.h
index 9f440ab..4438a19 100644
--- a/tools/perf/lib/include/internal/evlist.h
+++ b/tools/perf/lib/include/internal/evlist.h
@@ -22,6 +22,8 @@ struct perf_evlist {
size_t mmap_len;
struct fdarray pollfd;
struct hlist_head heads[PERF_EVLIST__HLIST_SIZE];
+ struct perf_mmap *mmap;
+ struct perf_mmap *mmap_ovw;
};
int perf_evlist__alloc_pollfd(struct perf_evlist *evlist);
diff --git a/tools/perf/lib/include/perf/evlist.h b/tools/perf/lib/include/perf/evlist.h
index 8a2ce07..28b6a12 100644
--- a/tools/perf/lib/include/perf/evlist.h
+++ b/tools/perf/lib/include/perf/evlist.h
@@ -33,4 +33,7 @@ LIBPERF_API void perf_evlist__set_maps(struct perf_evlist *evlist,
struct perf_thread_map *threads);
LIBPERF_API int perf_evlist__poll(struct perf_evlist *evlist, int timeout);
+LIBPERF_API int perf_evlist__mmap(struct perf_evlist *evlist, int pages);
+LIBPERF_API void perf_evlist__munmap(struct perf_evlist *evlist);
+
#endif /* __LIBPERF_EVLIST_H */
diff --git a/tools/perf/lib/libperf.map b/tools/perf/lib/libperf.map
index 8bb0d73..5a18fd1 100644
--- a/tools/perf/lib/libperf.map
+++ b/tools/perf/lib/libperf.map
@@ -40,6 +40,8 @@ LIBPERF_0.0.1 {
perf_evlist__next;
perf_evlist__set_maps;
perf_evlist__poll;
+ perf_evlist__mmap;
+ perf_evlist__munmap;
perf_mmap__consume;
perf_mmap__read_init;
perf_mmap__read_done;
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [tip: perf/core] libperf: Adopt perf_mmap__put() function from tools/perf
2019-10-07 12:53 ` [PATCH 07/36] libperf: Add perf_mmap__put() function Jiri Olsa
2019-10-10 13:11 ` Arnaldo Carvalho de Melo
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
1 sibling, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, Arnaldo Carvalho de Melo, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: 80e53d1148231d7d4fdc4cd89e5393616b33bf82
Gitweb: https://git.kernel.org/tip/80e53d1148231d7d4fdc4cd89e5393616b33bf82
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:15 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 10:09:25 -03:00
libperf: Adopt perf_mmap__put() function from tools/perf
Move perf_mmap__put() from tools/perf to libperf.
Once perf_mmap__put() is moved, we need a way to call application
related unmap code (AIO and aux related code for eprf), when the map
goes away.
Add the perf_mmap::unmap callback to do that.
The unmap path from perf is:
perf_mmap__put (libperf)
perf_mmap__munmap (libperf)
map->unmap_cb -> perf_mmap__unmap_cb (perf)
mmap__munmap (perf)
Committer notes:
Add missing linux/kernel.h to tools/perf/lib/mmap.c to get the BUG_ON
definition.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-8-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-record.c | 4 +--
tools/perf/lib/include/internal/mmap.h | 31 +++++++++++++++----------
tools/perf/lib/mmap.c | 15 +++++++++++-
tools/perf/util/evlist.c | 17 +++++++++-----
tools/perf/util/mmap.c | 11 +---------
tools/perf/util/mmap.h | 2 +--
6 files changed, 48 insertions(+), 32 deletions(-)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 025a12b..2fb83aa 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -197,7 +197,7 @@ static int record__aio_complete(struct mmap *md, struct aiocb *cblock)
* every aio write request started in record__aio_push() so
* decrement it because the request is now complete.
*/
- perf_mmap__put(md);
+ perf_mmap__put(&md->core);
rc = 1;
} else {
/*
@@ -332,7 +332,7 @@ static int record__aio_push(struct record *rec, struct mmap *map, off_t *off)
* map->refcount is decremented in record__aio_complete() after
* aio write operation finishes successfully.
*/
- perf_mmap__put(map);
+ perf_mmap__put(&map->core);
}
return ret;
diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
index 5c2ca9a..bf9cc7d 100644
--- a/tools/perf/lib/include/internal/mmap.h
+++ b/tools/perf/lib/include/internal/mmap.h
@@ -10,23 +10,28 @@
/* perf sample has 16 bits size limit */
#define PERF_SAMPLE_MAX_SIZE (1 << 16)
+struct perf_mmap;
+
+typedef void (*libperf_unmap_cb_t)(struct perf_mmap *map);
+
/**
* struct perf_mmap - perf's ring buffer mmap details
*
* @refcnt - e.g. code using PERF_EVENT_IOC_SET_OUTPUT to share this
*/
struct perf_mmap {
- void *base;
- int mask;
- int fd;
- int cpu;
- refcount_t refcnt;
- u64 prev;
- u64 start;
- u64 end;
- bool overwrite;
- u64 flush;
- char event_copy[PERF_SAMPLE_MAX_SIZE] __aligned(8);
+ void *base;
+ int mask;
+ int fd;
+ int cpu;
+ refcount_t refcnt;
+ u64 prev;
+ u64 start;
+ u64 end;
+ bool overwrite;
+ u64 flush;
+ libperf_unmap_cb_t unmap_cb;
+ char event_copy[PERF_SAMPLE_MAX_SIZE] __aligned(8);
};
struct perf_mmap_param {
@@ -36,10 +41,12 @@ struct perf_mmap_param {
size_t perf_mmap__mmap_len(struct perf_mmap *map);
-void perf_mmap__init(struct perf_mmap *map, bool overwrite);
+void perf_mmap__init(struct perf_mmap *map, bool overwrite,
+ libperf_unmap_cb_t unmap_cb);
int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
int fd, int cpu);
void perf_mmap__munmap(struct perf_mmap *map);
void perf_mmap__get(struct perf_mmap *map);
+void perf_mmap__put(struct perf_mmap *map);
#endif /* __LIBPERF_INTERNAL_MMAP_H */
diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
index 6eb228d..89c1e0e 100644
--- a/tools/perf/lib/mmap.c
+++ b/tools/perf/lib/mmap.c
@@ -2,11 +2,14 @@
#include <sys/mman.h>
#include <internal/mmap.h>
#include <internal/lib.h>
+#include <linux/kernel.h>
-void perf_mmap__init(struct perf_mmap *map, bool overwrite)
+void perf_mmap__init(struct perf_mmap *map, bool overwrite,
+ libperf_unmap_cb_t unmap_cb)
{
map->fd = -1;
map->overwrite = overwrite;
+ map->unmap_cb = unmap_cb;
refcount_set(&map->refcnt, 0);
}
@@ -40,9 +43,19 @@ void perf_mmap__munmap(struct perf_mmap *map)
map->fd = -1;
refcount_set(&map->refcnt, 0);
}
+ if (map && map->unmap_cb)
+ map->unmap_cb(map);
}
void perf_mmap__get(struct perf_mmap *map)
{
refcount_inc(&map->refcnt);
}
+
+void perf_mmap__put(struct perf_mmap *map)
+{
+ BUG_ON(map->base && refcount_read(&map->refcnt) == 0);
+
+ if (refcount_dec_and_test(&map->refcnt))
+ perf_mmap__munmap(map);
+}
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 0b877d3..4394a5a 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -433,7 +433,7 @@ static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd,
struct mmap *map = fda->priv[fd].ptr;
if (map)
- perf_mmap__put(map);
+ perf_mmap__put(&map->core);
}
int evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask)
@@ -601,11 +601,11 @@ static void evlist__munmap_nofree(struct evlist *evlist)
if (evlist->mmap)
for (i = 0; i < evlist->core.nr_mmaps; i++)
- mmap__munmap(&evlist->mmap[i]);
+ perf_mmap__munmap(&evlist->mmap[i].core);
if (evlist->overwrite_mmap)
for (i = 0; i < evlist->core.nr_mmaps; i++)
- mmap__munmap(&evlist->overwrite_mmap[i]);
+ perf_mmap__munmap(&evlist->overwrite_mmap[i].core);
}
void evlist__munmap(struct evlist *evlist)
@@ -615,6 +615,13 @@ void evlist__munmap(struct evlist *evlist)
zfree(&evlist->overwrite_mmap);
}
+static void perf_mmap__unmap_cb(struct perf_mmap *map)
+{
+ struct mmap *m = container_of(map, struct mmap, core);
+
+ mmap__munmap(m);
+}
+
static struct mmap *evlist__alloc_mmap(struct evlist *evlist,
bool overwrite)
{
@@ -638,7 +645,7 @@ static struct mmap *evlist__alloc_mmap(struct evlist *evlist,
* Each PERF_EVENT_IOC_SET_OUTPUT points to this mmap and
* thus does perf_mmap__get() on it.
*/
- perf_mmap__init(&map[i].core, overwrite);
+ perf_mmap__init(&map[i].core, overwrite, perf_mmap__unmap_cb);
}
return map;
@@ -715,7 +722,7 @@ static int evlist__mmap_per_evsel(struct evlist *evlist, int idx,
*/
if (!evsel->core.system_wide &&
perf_evlist__add_pollfd(&evlist->core, fd, &maps[idx], revent) < 0) {
- perf_mmap__put(&maps[idx]);
+ perf_mmap__put(&maps[idx].core);
return -1;
}
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index 2c73b5b..9f150d5 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -110,14 +110,6 @@ static bool perf_mmap__empty(struct mmap *map)
return perf_mmap__read_head(map) == map->core.prev && !map->auxtrace_mmap.base;
}
-void perf_mmap__put(struct mmap *map)
-{
- BUG_ON(map->core.base && refcount_read(&map->core.refcnt) == 0);
-
- if (refcount_dec_and_test(&map->core.refcnt))
- mmap__munmap(map);
-}
-
void perf_mmap__consume(struct mmap *map)
{
if (!map->core.overwrite) {
@@ -127,7 +119,7 @@ void perf_mmap__consume(struct mmap *map)
}
if (refcount_read(&map->core.refcnt) == 1 && perf_mmap__empty(map))
- perf_mmap__put(map);
+ perf_mmap__put(&map->core);
}
int __weak auxtrace_mmap__mmap(struct auxtrace_mmap *mm __maybe_unused,
@@ -308,7 +300,6 @@ static void perf_mmap__aio_munmap(struct mmap *map __maybe_unused)
void mmap__munmap(struct mmap *map)
{
- perf_mmap__munmap(&map->core);
perf_mmap__aio_munmap(map);
if (map->data != NULL) {
munmap(map->data, mmap__mmap_len(map));
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index 6a18b29..78e3c44 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -45,8 +45,6 @@ struct mmap_params {
int mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu);
void mmap__munmap(struct mmap *map);
-void perf_mmap__put(struct mmap *map);
-
void perf_mmap__consume(struct mmap *map);
static inline u64 perf_mmap__read_head(struct mmap *mm)
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [tip: perf/core] libperf: Adopt perf_mmap__unmap() function from tools/perf
2019-10-07 12:53 ` [PATCH 06/36] libperf: Add perf_mmap__unmap() function Jiri Olsa
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
0 siblings, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, Arnaldo Carvalho de Melo, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: 59d7ea620b58fa7d107834a81528e3098f1c27b0
Gitweb: https://git.kernel.org/tip/59d7ea620b58fa7d107834a81528e3098f1c27b0
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:14 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 10:05:57 -03:00
libperf: Adopt perf_mmap__unmap() function from tools/perf
Move perf_mmap__unmap() from tools/perf to libperf, to internal header
internal/mmap.h. It will be used in the following patches. And rename
the existing perf's function to mmap__munmap().
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-7-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/lib/include/internal/mmap.h | 1 +
tools/perf/lib/mmap.c | 10 ++++++++++
tools/perf/util/evlist.c | 4 ++--
tools/perf/util/mmap.c | 11 +++--------
tools/perf/util/mmap.h | 2 +-
5 files changed, 17 insertions(+), 11 deletions(-)
diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
index 2e68974..5c2ca9a 100644
--- a/tools/perf/lib/include/internal/mmap.h
+++ b/tools/perf/lib/include/internal/mmap.h
@@ -39,6 +39,7 @@ size_t perf_mmap__mmap_len(struct perf_mmap *map);
void perf_mmap__init(struct perf_mmap *map, bool overwrite);
int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
int fd, int cpu);
+void perf_mmap__munmap(struct perf_mmap *map);
void perf_mmap__get(struct perf_mmap *map);
#endif /* __LIBPERF_INTERNAL_MMAP_H */
diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
index b765e05..6eb228d 100644
--- a/tools/perf/lib/mmap.c
+++ b/tools/perf/lib/mmap.c
@@ -32,6 +32,16 @@ int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
return 0;
}
+void perf_mmap__munmap(struct perf_mmap *map)
+{
+ if (map && map->base != NULL) {
+ munmap(map->base, perf_mmap__mmap_len(map));
+ map->base = NULL;
+ map->fd = -1;
+ refcount_set(&map->refcnt, 0);
+ }
+}
+
void perf_mmap__get(struct perf_mmap *map)
{
refcount_inc(&map->refcnt);
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index dc5b360..0b877d3 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -601,11 +601,11 @@ static void evlist__munmap_nofree(struct evlist *evlist)
if (evlist->mmap)
for (i = 0; i < evlist->core.nr_mmaps; i++)
- perf_mmap__munmap(&evlist->mmap[i]);
+ mmap__munmap(&evlist->mmap[i]);
if (evlist->overwrite_mmap)
for (i = 0; i < evlist->core.nr_mmaps; i++)
- perf_mmap__munmap(&evlist->overwrite_mmap[i]);
+ mmap__munmap(&evlist->overwrite_mmap[i]);
}
void evlist__munmap(struct evlist *evlist)
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index be691b5..2c73b5b 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -115,7 +115,7 @@ void perf_mmap__put(struct mmap *map)
BUG_ON(map->core.base && refcount_read(&map->core.refcnt) == 0);
if (refcount_dec_and_test(&map->core.refcnt))
- perf_mmap__munmap(map);
+ mmap__munmap(map);
}
void perf_mmap__consume(struct mmap *map)
@@ -306,19 +306,14 @@ static void perf_mmap__aio_munmap(struct mmap *map __maybe_unused)
}
#endif
-void perf_mmap__munmap(struct mmap *map)
+void mmap__munmap(struct mmap *map)
{
+ perf_mmap__munmap(&map->core);
perf_mmap__aio_munmap(map);
if (map->data != NULL) {
munmap(map->data, mmap__mmap_len(map));
map->data = NULL;
}
- if (map->core.base != NULL) {
- munmap(map->core.base, mmap__mmap_len(map));
- map->core.base = NULL;
- map->core.fd = -1;
- refcount_set(&map->core.refcnt, 0);
- }
auxtrace_mmap__munmap(&map->auxtrace_mmap);
}
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index a73402e..6a18b29 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -43,7 +43,7 @@ struct mmap_params {
};
int mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu);
-void perf_mmap__munmap(struct mmap *map);
+void mmap__munmap(struct mmap *map);
void perf_mmap__put(struct mmap *map);
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [tip: perf/core] perf tools: Use perf_mmap way to detect aux mmap
2019-10-07 12:53 ` [PATCH 08/36] perf tools: Use perf_mmap way to detect aux mmap Jiri Olsa
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
0 siblings, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, Arnaldo Carvalho de Melo, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: 1d40ae4e1784bfa1646fd153ca022db21511284f
Gitweb: https://git.kernel.org/tip/1d40ae4e1784bfa1646fd153ca022db21511284f
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:16 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 10:11:54 -03:00
perf tools: Use perf_mmap way to detect aux mmap
We will move this code to libperf shortly, so we need to free it of
'struct auxtrace_mmap' usage, because it won't be available in libperf
(for now).
The perf_event_mmap_page::aux_size is set when the aux mmap is mapped,
so the check is equivalent.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-9-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/mmap.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index 9f150d5..f246dd4 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -107,7 +107,9 @@ union perf_event *perf_mmap__read_event(struct mmap *map)
static bool perf_mmap__empty(struct mmap *map)
{
- return perf_mmap__read_head(map) == map->core.prev && !map->auxtrace_mmap.base;
+ struct perf_event_mmap_page *pc = map->core.base;
+
+ return perf_mmap__read_head(map) == map->core.prev && !pc->aux_size;
}
void perf_mmap__consume(struct mmap *map)
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [tip: perf/core] libperf: Adopt perf_mmap__get() function from tools/perf
2019-10-07 12:53 ` [PATCH 05/36] libperf: Add perf_mmap__get() function Jiri Olsa
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
0 siblings, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, Arnaldo Carvalho de Melo, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: e75710f063e29ae7715c57b45eb27c2d504b32ca
Gitweb: https://git.kernel.org/tip/e75710f063e29ae7715c57b45eb27c2d504b32ca
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:13 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 09:53:27 -03:00
libperf: Adopt perf_mmap__get() function from tools/perf
Move perf_mmap__get() from tools/perf to libperf in the internal header
internal/mmap.h.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-6-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-record.c | 2 +-
tools/perf/lib/include/internal/mmap.h | 1 +
tools/perf/lib/mmap.c | 5 +++++
tools/perf/util/evlist.c | 2 +-
tools/perf/util/mmap.c | 5 -----
tools/perf/util/mmap.h | 1 -
6 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index f05e8b7..025a12b 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -293,7 +293,7 @@ static int record__aio_pushfn(struct mmap *map, void *to, void *buf, size_t size
* after started aio request completion or at record__aio_push()
* if the request failed to start.
*/
- perf_mmap__get(map);
+ perf_mmap__get(&map->core);
}
aio->size += size;
diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
index 7067b70..2e68974 100644
--- a/tools/perf/lib/include/internal/mmap.h
+++ b/tools/perf/lib/include/internal/mmap.h
@@ -39,5 +39,6 @@ size_t perf_mmap__mmap_len(struct perf_mmap *map);
void perf_mmap__init(struct perf_mmap *map, bool overwrite);
int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
int fd, int cpu);
+void perf_mmap__get(struct perf_mmap *map);
#endif /* __LIBPERF_INTERNAL_MMAP_H */
diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
index b216a7d..b765e05 100644
--- a/tools/perf/lib/mmap.c
+++ b/tools/perf/lib/mmap.c
@@ -31,3 +31,8 @@ int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
map->cpu = cpu;
return 0;
}
+
+void perf_mmap__get(struct perf_mmap *map)
+{
+ refcount_inc(&map->refcnt);
+}
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index f9781de..dc5b360 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -701,7 +701,7 @@ static int evlist__mmap_per_evsel(struct evlist *evlist, int idx,
if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0)
return -1;
- perf_mmap__get(&maps[idx]);
+ perf_mmap__get(&maps[idx].core);
}
revent = perf_evlist__should_poll(evlist, evsel) ? POLLIN : 0;
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index acef6e3..be691b5 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -110,11 +110,6 @@ static bool perf_mmap__empty(struct mmap *map)
return perf_mmap__read_head(map) == map->core.prev && !map->auxtrace_mmap.base;
}
-void perf_mmap__get(struct mmap *map)
-{
- refcount_inc(&map->core.refcnt);
-}
-
void perf_mmap__put(struct mmap *map)
{
BUG_ON(map->core.base && refcount_read(&map->core.refcnt) == 0);
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index a60e6ea..a73402e 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -45,7 +45,6 @@ struct mmap_params {
int mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu);
void perf_mmap__munmap(struct mmap *map);
-void perf_mmap__get(struct mmap *map);
void perf_mmap__put(struct mmap *map);
void perf_mmap__consume(struct mmap *map);
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [tip: perf/core] libperf: Add 'struct perf_mmap_param'
2019-10-07 12:53 ` [PATCH 02/36] libperf: Add 'struct perf_mmap_param' Jiri Olsa
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
0 siblings, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, Arnaldo Carvalho de Melo, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: e440979faf6ac8048e1792af383df6af78dd1cb0
Gitweb: https://git.kernel.org/tip/e440979faf6ac8048e1792af383df6af78dd1cb0
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:10 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 09:40:00 -03:00
libperf: Add 'struct perf_mmap_param'
Add libperf's version of mmap params 'struct perf_mmap_param' object
with the basics: 'prot' and 'mask'. Encapsulate it in the current
'struct mmap_params' object.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-3-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/lib/include/internal/mmap.h | 5 +++++
tools/perf/util/evlist.c | 14 +++++++++-----
tools/perf/util/mmap.c | 4 ++--
tools/perf/util/mmap.h | 3 ++-
4 files changed, 18 insertions(+), 8 deletions(-)
diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
index e25890d..b26806b 100644
--- a/tools/perf/lib/include/internal/mmap.h
+++ b/tools/perf/lib/include/internal/mmap.h
@@ -29,6 +29,11 @@ struct perf_mmap {
char event_copy[PERF_SAMPLE_MAX_SIZE] __aligned(8);
};
+struct perf_mmap_param {
+ int prot;
+ int mask;
+};
+
void perf_mmap__init(struct perf_mmap *map, bool overwrite);
#endif /* __LIBPERF_INTERNAL_MMAP_H */
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 6c8de08..3a19a7c 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -667,7 +667,7 @@ static int evlist__mmap_per_evsel(struct evlist *evlist, int idx,
int fd;
int cpu;
- mp->prot = PROT_READ | PROT_WRITE;
+ mp->core.prot = PROT_READ | PROT_WRITE;
if (evsel->core.attr.write_backward) {
output = _output_overwrite;
maps = evlist->overwrite_mmap;
@@ -680,7 +680,7 @@ static int evlist__mmap_per_evsel(struct evlist *evlist, int idx,
if (evlist->bkw_mmap_state == BKW_MMAP_NOTREADY)
perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING);
}
- mp->prot &= ~PROT_WRITE;
+ mp->core.prot &= ~PROT_WRITE;
}
if (evsel->core.system_wide && thread)
@@ -921,8 +921,12 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
* Its value is decided by evsel's write_backward.
* So &mp should not be passed through const pointer.
*/
- struct mmap_params mp = { .nr_cblocks = nr_cblocks, .affinity = affinity, .flush = flush,
- .comp_level = comp_level };
+ struct mmap_params mp = {
+ .nr_cblocks = nr_cblocks,
+ .affinity = affinity,
+ .flush = flush,
+ .comp_level = comp_level
+ };
if (!evlist->mmap)
evlist->mmap = evlist__alloc_mmap(evlist, false);
@@ -934,7 +938,7 @@ int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
evlist->core.mmap_len = evlist__mmap_size(pages);
pr_debug("mmap size %zuB\n", evlist->core.mmap_len);
- mp.mask = evlist->core.mmap_len - page_size - 1;
+ mp.core.mask = evlist->core.mmap_len - page_size - 1;
auxtrace_mmap_params__init(&mp.auxtrace_mp, evlist->core.mmap_len,
auxtrace_pages, auxtrace_overwrite);
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index a35dc57..a496ced 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -370,8 +370,8 @@ int perf_mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu)
*/
refcount_set(&map->core.refcnt, 2);
map->core.prev = 0;
- map->core.mask = mp->mask;
- map->core.base = mmap(NULL, perf_mmap__mmap_len(map), mp->prot,
+ map->core.mask = mp->core.mask;
+ map->core.base = mmap(NULL, perf_mmap__mmap_len(map), mp->core.prot,
MAP_SHARED, fd, 0);
if (map->core.base == MAP_FAILED) {
pr_debug2("failed to mmap perf event ring buffer, error %d\n",
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index e567c1c..4ff75d8 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -37,7 +37,8 @@ struct mmap {
};
struct mmap_params {
- int prot, mask, nr_cblocks, affinity, flush, comp_level;
+ struct perf_mmap_param core;
+ int nr_cblocks, affinity, flush, comp_level;
struct auxtrace_mmap_params auxtrace_mp;
};
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [tip: perf/core] libperf: Adopt perf_mmap__mmap_len() function from tools/perf
2019-10-07 12:53 ` [PATCH 03/36] libperf: Add perf_mmap__mmap_len() function Jiri Olsa
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
0 siblings, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, Arnaldo Carvalho de Melo, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: bf59b3053e63783520c2810fc3f676553bc7eedd
Gitweb: https://git.kernel.org/tip/bf59b3053e63783520c2810fc3f676553bc7eedd
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:11 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 09:41:38 -03:00
libperf: Adopt perf_mmap__mmap_len() function from tools/perf
Move perf_mmap__mmap_len() from tools/perf wto libperf, it will be used
in the following patches. And rename the existing perf's function to
mmap__mmap_len().
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-4-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-record.c | 4 ++--
tools/perf/lib/include/internal/mmap.h | 2 ++
tools/perf/lib/mmap.c | 6 ++++++
tools/perf/util/mmap.c | 20 ++++++++++----------
tools/perf/util/mmap.h | 2 +-
5 files changed, 21 insertions(+), 13 deletions(-)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 2333286..f05e8b7 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -276,7 +276,7 @@ static int record__aio_pushfn(struct mmap *map, void *to, void *buf, size_t size
if (record__comp_enabled(aio->rec)) {
size = zstd_compress(aio->rec->session, aio->data + aio->size,
- perf_mmap__mmap_len(map) - aio->size,
+ mmap__mmap_len(map) - aio->size,
buf, size);
} else {
memcpy(aio->data + aio->size, buf, size);
@@ -488,7 +488,7 @@ static int record__pushfn(struct mmap *map, void *to, void *bf, size_t size)
struct record *rec = to;
if (record__comp_enabled(rec)) {
- size = zstd_compress(rec->session, map->data, perf_mmap__mmap_len(map), bf, size);
+ size = zstd_compress(rec->session, map->data, mmap__mmap_len(map), bf, size);
bf = map->data;
}
diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
index b26806b..e7a6726 100644
--- a/tools/perf/lib/include/internal/mmap.h
+++ b/tools/perf/lib/include/internal/mmap.h
@@ -34,6 +34,8 @@ struct perf_mmap_param {
int mask;
};
+size_t perf_mmap__mmap_len(struct perf_mmap *map);
+
void perf_mmap__init(struct perf_mmap *map, bool overwrite);
#endif /* __LIBPERF_INTERNAL_MMAP_H */
diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
index 3da6177..cc4284d 100644
--- a/tools/perf/lib/mmap.c
+++ b/tools/perf/lib/mmap.c
@@ -1,5 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
#include <internal/mmap.h>
+#include <internal/lib.h>
void perf_mmap__init(struct perf_mmap *map, bool overwrite)
{
@@ -7,3 +8,8 @@ void perf_mmap__init(struct perf_mmap *map, bool overwrite)
map->overwrite = overwrite;
refcount_set(&map->refcnt, 0);
}
+
+size_t perf_mmap__mmap_len(struct perf_mmap *map)
+{
+ return map->mask + 1 + page_size;
+}
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index a496ced..a8e81c4 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -23,9 +23,9 @@
#include "../perf.h"
#include <internal/lib.h> /* page_size */
-size_t perf_mmap__mmap_len(struct mmap *map)
+size_t mmap__mmap_len(struct mmap *map)
{
- return map->core.mask + 1 + page_size;
+ return perf_mmap__mmap_len(&map->core);
}
/* When check_messup is true, 'end' must points to a good entry */
@@ -170,7 +170,7 @@ static int perf_mmap__aio_enabled(struct mmap *map)
#ifdef HAVE_LIBNUMA_SUPPORT
static int perf_mmap__aio_alloc(struct mmap *map, int idx)
{
- map->aio.data[idx] = mmap(NULL, perf_mmap__mmap_len(map), PROT_READ|PROT_WRITE,
+ map->aio.data[idx] = mmap(NULL, mmap__mmap_len(map), PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
if (map->aio.data[idx] == MAP_FAILED) {
map->aio.data[idx] = NULL;
@@ -183,7 +183,7 @@ static int perf_mmap__aio_alloc(struct mmap *map, int idx)
static void perf_mmap__aio_free(struct mmap *map, int idx)
{
if (map->aio.data[idx]) {
- munmap(map->aio.data[idx], perf_mmap__mmap_len(map));
+ munmap(map->aio.data[idx], mmap__mmap_len(map));
map->aio.data[idx] = NULL;
}
}
@@ -196,7 +196,7 @@ static int perf_mmap__aio_bind(struct mmap *map, int idx, int cpu, int affinity)
if (affinity != PERF_AFFINITY_SYS && cpu__max_node() > 1) {
data = map->aio.data[idx];
- mmap_len = perf_mmap__mmap_len(map);
+ mmap_len = mmap__mmap_len(map);
node_mask = 1UL << cpu__get_node(cpu);
if (mbind(data, mmap_len, MPOL_BIND, &node_mask, 1, 0)) {
pr_err("Failed to bind [%p-%p] AIO buffer to node %d: error %m\n",
@@ -210,7 +210,7 @@ static int perf_mmap__aio_bind(struct mmap *map, int idx, int cpu, int affinity)
#else /* !HAVE_LIBNUMA_SUPPORT */
static int perf_mmap__aio_alloc(struct mmap *map, int idx)
{
- map->aio.data[idx] = malloc(perf_mmap__mmap_len(map));
+ map->aio.data[idx] = malloc(mmap__mmap_len(map));
if (map->aio.data[idx] == NULL)
return -1;
@@ -315,11 +315,11 @@ void perf_mmap__munmap(struct mmap *map)
{
perf_mmap__aio_munmap(map);
if (map->data != NULL) {
- munmap(map->data, perf_mmap__mmap_len(map));
+ munmap(map->data, mmap__mmap_len(map));
map->data = NULL;
}
if (map->core.base != NULL) {
- munmap(map->core.base, perf_mmap__mmap_len(map));
+ munmap(map->core.base, mmap__mmap_len(map));
map->core.base = NULL;
map->core.fd = -1;
refcount_set(&map->core.refcnt, 0);
@@ -371,7 +371,7 @@ int perf_mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu)
refcount_set(&map->core.refcnt, 2);
map->core.prev = 0;
map->core.mask = mp->core.mask;
- map->core.base = mmap(NULL, perf_mmap__mmap_len(map), mp->core.prot,
+ map->core.base = mmap(NULL, mmap__mmap_len(map), mp->core.prot,
MAP_SHARED, fd, 0);
if (map->core.base == MAP_FAILED) {
pr_debug2("failed to mmap perf event ring buffer, error %d\n",
@@ -389,7 +389,7 @@ int perf_mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu)
map->comp_level = mp->comp_level;
if (map->comp_level && !perf_mmap__aio_enabled(map)) {
- map->data = mmap(NULL, perf_mmap__mmap_len(map), PROT_READ|PROT_WRITE,
+ map->data = mmap(NULL, mmap__mmap_len(map), PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
if (map->data == MAP_FAILED) {
pr_debug2("failed to mmap data buffer, error %d\n",
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index 4ff75d8..2b97dc6 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -67,7 +67,7 @@ union perf_event *perf_mmap__read_event(struct mmap *map);
int perf_mmap__push(struct mmap *md, void *to,
int push(struct mmap *map, void *to, void *buf, size_t size));
-size_t perf_mmap__mmap_len(struct mmap *map);
+size_t mmap__mmap_len(struct mmap *map);
int perf_mmap__read_init(struct mmap *md);
void perf_mmap__read_done(struct mmap *map);
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [tip: perf/core] libperf: Adopt perf_mmap__mmap() function from tools/perf
2019-10-07 12:53 ` [PATCH 04/36] libperf: Add perf_mmap__mmap() function Jiri Olsa
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
0 siblings, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, Arnaldo Carvalho de Melo, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: 32c261c070c222858148c2171698d2954242ddd9
Gitweb: https://git.kernel.org/tip/32c261c070c222858148c2171698d2954242ddd9
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:12 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 09:42:59 -03:00
libperf: Adopt perf_mmap__mmap() function from tools/perf
Move perf_mmap__mmap() from tools/perf to libperf, it will be used in
the following patches. And rename the existing perf's function to
mmap__mmap().
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-5-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/lib/include/internal/mmap.h | 2 ++
tools/perf/lib/mmap.c | 18 ++++++++++++++++++
tools/perf/util/evlist.c | 2 +-
tools/perf/util/mmap.c | 12 +++---------
tools/perf/util/mmap.h | 2 +-
5 files changed, 25 insertions(+), 11 deletions(-)
diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
index e7a6726..7067b70 100644
--- a/tools/perf/lib/include/internal/mmap.h
+++ b/tools/perf/lib/include/internal/mmap.h
@@ -37,5 +37,7 @@ struct perf_mmap_param {
size_t perf_mmap__mmap_len(struct perf_mmap *map);
void perf_mmap__init(struct perf_mmap *map, bool overwrite);
+int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
+ int fd, int cpu);
#endif /* __LIBPERF_INTERNAL_MMAP_H */
diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
index cc4284d..b216a7d 100644
--- a/tools/perf/lib/mmap.c
+++ b/tools/perf/lib/mmap.c
@@ -1,4 +1,5 @@
// SPDX-License-Identifier: GPL-2.0
+#include <sys/mman.h>
#include <internal/mmap.h>
#include <internal/lib.h>
@@ -13,3 +14,20 @@ size_t perf_mmap__mmap_len(struct perf_mmap *map)
{
return map->mask + 1 + page_size;
}
+
+int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
+ int fd, int cpu)
+{
+ map->prev = 0;
+ map->mask = mp->mask;
+ map->base = mmap(NULL, perf_mmap__mmap_len(map), mp->prot,
+ MAP_SHARED, fd, 0);
+ if (map->base == MAP_FAILED) {
+ map->base = NULL;
+ return -1;
+ }
+
+ map->fd = fd;
+ map->cpu = cpu;
+ return 0;
+}
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 3a19a7c..f9781de 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -695,7 +695,7 @@ static int evlist__mmap_per_evsel(struct evlist *evlist, int idx,
if (*output == -1) {
*output = fd;
- if (perf_mmap__mmap(&maps[idx], mp, *output, evlist_cpu) < 0)
+ if (mmap__mmap(&maps[idx], mp, *output, evlist_cpu) < 0)
return -1;
} else {
if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0)
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index a8e81c4..acef6e3 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -353,7 +353,7 @@ static void perf_mmap__setup_affinity_mask(struct mmap *map, struct mmap_params
CPU_SET(map->core.cpu, &map->affinity_mask);
}
-int perf_mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu)
+int mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu)
{
/*
* The last one will be done at perf_mmap__consume(), so that we
@@ -369,18 +369,12 @@ int perf_mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu)
* perf_evlist__filter_pollfd().
*/
refcount_set(&map->core.refcnt, 2);
- map->core.prev = 0;
- map->core.mask = mp->core.mask;
- map->core.base = mmap(NULL, mmap__mmap_len(map), mp->core.prot,
- MAP_SHARED, fd, 0);
- if (map->core.base == MAP_FAILED) {
+
+ if (perf_mmap__mmap(&map->core, &mp->core, fd, cpu)) {
pr_debug2("failed to mmap perf event ring buffer, error %d\n",
errno);
- map->core.base = NULL;
return -1;
}
- map->core.fd = fd;
- map->core.cpu = cpu;
perf_mmap__setup_affinity_mask(map, mp);
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index 2b97dc6..a60e6ea 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -42,7 +42,7 @@ struct mmap_params {
struct auxtrace_mmap_params auxtrace_mp;
};
-int perf_mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu);
+int mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu);
void perf_mmap__munmap(struct mmap *map);
void perf_mmap__get(struct mmap *map);
^ permalink raw reply related [flat|nested] 69+ messages in thread
* [tip: perf/core] libperf: Add perf_mmap__init() function
2019-10-07 12:53 ` [PATCH 01/36] libperf: Add perf_mmap__init() function Jiri Olsa
@ 2019-10-15 5:31 ` tip-bot2 for Jiri Olsa
0 siblings, 0 replies; 69+ messages in thread
From: tip-bot2 for Jiri Olsa @ 2019-10-15 5:31 UTC (permalink / raw)
To: linux-tip-commits
Cc: Jiri Olsa, Alexander Shishkin, Michael Petlan, Namhyung Kim,
Peter Zijlstra, Arnaldo Carvalho de Melo, Ingo Molnar,
Borislav Petkov, linux-kernel
The following commit has been merged into the perf/core branch of tip:
Commit-ID: 353120b48d4f61288e4745b0c8a191784b11c0f4
Gitweb: https://git.kernel.org/tip/353120b48d4f61288e4745b0c8a191784b11c0f4
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 07 Oct 2019 14:53:09 +02:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Thu, 10 Oct 2019 09:37:25 -03:00
libperf: Add perf_mmap__init() function
Add perf_mmap__init() function to initialize 'struct perf_mmap' objects.
Add it to a new mmap.c source file, that will carry all the mmap related
functions.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20191007125344.14268-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/lib/Build | 1 +
tools/perf/lib/include/internal/mmap.h | 2 ++
tools/perf/lib/mmap.c | 9 +++++++++
tools/perf/util/evlist.c | 5 ++---
4 files changed, 14 insertions(+), 3 deletions(-)
create mode 100644 tools/perf/lib/mmap.c
diff --git a/tools/perf/lib/Build b/tools/perf/lib/Build
index c31f1c1..2ef9a4e 100644
--- a/tools/perf/lib/Build
+++ b/tools/perf/lib/Build
@@ -3,6 +3,7 @@ libperf-y += cpumap.o
libperf-y += threadmap.o
libperf-y += evsel.o
libperf-y += evlist.o
+libperf-y += mmap.o
libperf-y += zalloc.o
libperf-y += xyarray.o
libperf-y += lib.o
diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
index ba1e519..e25890d 100644
--- a/tools/perf/lib/include/internal/mmap.h
+++ b/tools/perf/lib/include/internal/mmap.h
@@ -29,4 +29,6 @@ struct perf_mmap {
char event_copy[PERF_SAMPLE_MAX_SIZE] __aligned(8);
};
+void perf_mmap__init(struct perf_mmap *map, bool overwrite);
+
#endif /* __LIBPERF_INTERNAL_MMAP_H */
diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
new file mode 100644
index 0000000..3da6177
--- /dev/null
+++ b/tools/perf/lib/mmap.c
@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <internal/mmap.h>
+
+void perf_mmap__init(struct perf_mmap *map, bool overwrite)
+{
+ map->fd = -1;
+ map->overwrite = overwrite;
+ refcount_set(&map->refcnt, 0);
+}
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index e33b46a..6c8de08 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -629,8 +629,6 @@ static struct mmap *evlist__alloc_mmap(struct evlist *evlist,
return NULL;
for (i = 0; i < evlist->core.nr_mmaps; i++) {
- map[i].core.fd = -1;
- map[i].core.overwrite = overwrite;
/*
* When the perf_mmap() call is made we grab one refcount, plus
* one extra to let perf_mmap__consume() get the last
@@ -640,8 +638,9 @@ static struct mmap *evlist__alloc_mmap(struct evlist *evlist,
* Each PERF_EVENT_IOC_SET_OUTPUT points to this mmap and
* thus does perf_mmap__get() on it.
*/
- refcount_set(&map[i].core.refcnt, 0);
+ perf_mmap__init(&map[i].core, overwrite);
}
+
return map;
}
^ permalink raw reply related [flat|nested] 69+ messages in thread
end of thread, other threads:[~2019-10-15 5:38 UTC | newest]
Thread overview: 69+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-10-07 12:53 [PATCHv2 00/36] libperf: Add sampling interface Jiri Olsa
2019-10-07 12:53 ` [PATCH 01/36] libperf: Add perf_mmap__init() function Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] " tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 02/36] libperf: Add 'struct perf_mmap_param' Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] " tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 03/36] libperf: Add perf_mmap__mmap_len() function Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Adopt perf_mmap__mmap_len() function from tools/perf tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 04/36] libperf: Add perf_mmap__mmap() function Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Adopt perf_mmap__mmap() function from tools/perf tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 05/36] libperf: Add perf_mmap__get() function Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Adopt perf_mmap__get() function from tools/perf tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 06/36] libperf: Add perf_mmap__unmap() function Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Adopt perf_mmap__unmap() function from tools/perf tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 07/36] libperf: Add perf_mmap__put() function Jiri Olsa
2019-10-10 13:11 ` Arnaldo Carvalho de Melo
2019-10-15 5:31 ` [tip: perf/core] libperf: Adopt perf_mmap__put() function from tools/perf tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 08/36] perf tools: Use perf_mmap way to detect aux mmap Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] " tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 09/36] libperf: Add perf_mmap__consume() function Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Adopt perf_mmap__consume() function from tools/perf tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 10/36] libperf: Add perf_mmap__read_init() function Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Adopt perf_mmap__read_init() from tools/perf tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 11/36] libperf: Add perf_mmap__read_done() function Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Adopt perf_mmap__read_done() from tools/perf tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 12/36] libperf: Add perf_mmap__read_event() function Jiri Olsa
2019-10-10 14:47 ` Arnaldo Carvalho de Melo
2019-10-10 15:32 ` Jiri Olsa
2019-10-10 16:07 ` Arnaldo Carvalho de Melo
2019-10-15 5:31 ` [tip: perf/core] libperf: Adopt perf_mmap__read_event() from tools/perf tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 13/36] libperf: Add perf_evlist__mmap()/munmap() functions Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Adopt perf_evlist__mmap()/munmap() from tools/perf tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 14/36] libperf: Add perf_evlist__mmap_ops function Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Introduce perf_evlist__mmap_ops() tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 15/36] libperf: Add perf_evlist_mmap_ops::idx callback Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Introduce " tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 16/36] libperf: Add perf_evlist_mmap_ops::get callback Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] " tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 17/36] libperf: Add perf_evlist_mmap_ops::mmap callback Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Introduce " tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 18/36] perf tools: Add perf_evlist__mmap_cb_idx function Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] perf tools: Introduce perf_evlist__mmap_cb_idx() tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 19/36] perf tools: Add perf_evlist__mmap_cb_get function Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] perf evlist: Introduce perf_evlist__mmap_cb_get() tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 20/36] perf tools: Add perf_evlist__mmap_cb_mmap function Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] perf evlist: Introduce perf_evlist__mmap_cb_mmap() tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 21/36] perf tools: Switch to libperf mmap interface Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] perf evlist: Switch to libperf's " tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 22/36] libperf: Centralize map refcnt setting Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] " tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 23/36] libperf: Move pollfd allocation to libperf Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Move the pollfd allocation from tools/perf " tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 24/36] libperf: Add perf_evlist__exit function Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Introduce perf_evlist__exit() tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 25/36] libperf: Add perf_evlist__purge function Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Introduce perf_evlist__purge() tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 26/36] libperf: Add perf_evlist__filter_pollfd function Jiri Olsa
2019-10-15 5:31 ` [tip: perf/core] libperf: Adopt perf_evlist__filter_pollfd() from tools/perf tip-bot2 for Jiri Olsa
2019-10-07 12:53 ` [PATCH 27/36] libperf: Add perf_evlist__for_each_mmap function Jiri Olsa
2019-10-10 16:06 ` Arnaldo Carvalho de Melo
2019-10-10 16:20 ` Jiri Olsa
2019-10-07 12:53 ` [PATCH 28/36] libperf: Move mmap allocation to perf_evlist__mmap_ops::get Jiri Olsa
2019-10-07 12:53 ` [PATCH 29/36] libperf: Move mask setup to perf_evlist__mmap_ops function Jiri Olsa
2019-10-07 12:53 ` [PATCH 30/36] libperf: Link static tests with libapi.a Jiri Olsa
2019-10-07 12:53 ` [PATCH 31/36] libperf: Add _GNU_SOURCE define to compilation Jiri Olsa
2019-10-07 12:53 ` [PATCH 32/36] libperf: Add tests_mmap_thread test Jiri Olsa
2019-10-07 12:53 ` [PATCH 33/36] libperf: Add tests_mmap_cpus test Jiri Olsa
2019-10-07 12:53 ` [PATCH 34/36] libperf: Keep count of failed tests Jiri Olsa
2019-10-07 12:53 ` [PATCH 35/36] libperf: Do not export perf_evsel__init/perf_evlist__init Jiri Olsa
2019-10-07 12:53 ` [PATCH 36/36] libperf: Add pr_err macro Jiri Olsa
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