* [PATCH 1/9] perf: Pass protection and flags bits through mmap2 interface
2014-05-28 13:20 [GIT PULL 0/9] perf/core improvements and fixes Jiri Olsa
@ 2014-05-28 13:20 ` Jiri Olsa
2014-05-28 13:20 ` [PATCH 2/9] Revert "perf: Disable PERF_RECORD_MMAP2 support" Jiri Olsa
` (7 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: Jiri Olsa @ 2014-05-28 13:20 UTC (permalink / raw)
To: Ingo Molnar
Cc: linux-kernel, Peter Zijlstra, Peter Zijlstra, Don Zickus, Jiri Olsa
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
The mmap2 interface was missing the protection and flags bits needed to
accurately determine if a mmap memory area was shared or private and
if it was readable or not.
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
[tweaked patch to compile and wrote changelog]
Signed-off-by: Don Zickus <dzickus@redhat.com>
Link: http://lkml.kernel.org/r/1400526833-141779-2-git-send-email-dzickus@redhat.com
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
include/uapi/linux/perf_event.h | 1 +
kernel/events/core.c | 33 +++++++++++++++++++++++++++++++++
2 files changed, 34 insertions(+)
diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
index e3fc8f0..0d18ded 100644
--- a/include/uapi/linux/perf_event.h
+++ b/include/uapi/linux/perf_event.h
@@ -699,6 +699,7 @@ enum perf_event_type {
* u32 min;
* u64 ino;
* u64 ino_generation;
+ * u32 prot, flags;
* char filename[];
* struct sample_id sample_id;
* };
diff --git a/kernel/events/core.c b/kernel/events/core.c
index ed50b09..cd68f49 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -40,6 +40,7 @@
#include <linux/mm_types.h>
#include <linux/cgroup.h>
#include <linux/module.h>
+#include <linux/mman.h>
#include "internal.h"
@@ -5116,6 +5117,7 @@ struct perf_mmap_event {
int maj, min;
u64 ino;
u64 ino_generation;
+ u32 prot, flags;
struct {
struct perf_event_header header;
@@ -5157,6 +5159,8 @@ static void perf_event_mmap_output(struct perf_event *event,
mmap_event->event_id.header.size += sizeof(mmap_event->min);
mmap_event->event_id.header.size += sizeof(mmap_event->ino);
mmap_event->event_id.header.size += sizeof(mmap_event->ino_generation);
+ mmap_event->event_id.header.size += sizeof(mmap_event->prot);
+ mmap_event->event_id.header.size += sizeof(mmap_event->flags);
}
perf_event_header__init_id(&mmap_event->event_id.header, &sample, event);
@@ -5175,6 +5179,8 @@ static void perf_event_mmap_output(struct perf_event *event,
perf_output_put(&handle, mmap_event->min);
perf_output_put(&handle, mmap_event->ino);
perf_output_put(&handle, mmap_event->ino_generation);
+ perf_output_put(&handle, mmap_event->prot);
+ perf_output_put(&handle, mmap_event->flags);
}
__output_copy(&handle, mmap_event->file_name,
@@ -5193,6 +5199,7 @@ static void perf_event_mmap_event(struct perf_mmap_event *mmap_event)
struct file *file = vma->vm_file;
int maj = 0, min = 0;
u64 ino = 0, gen = 0;
+ u32 prot = 0, flags = 0;
unsigned int size;
char tmp[16];
char *buf = NULL;
@@ -5223,6 +5230,28 @@ static void perf_event_mmap_event(struct perf_mmap_event *mmap_event)
gen = inode->i_generation;
maj = MAJOR(dev);
min = MINOR(dev);
+
+ if (vma->vm_flags & VM_READ)
+ prot |= PROT_READ;
+ if (vma->vm_flags & VM_WRITE)
+ prot |= PROT_WRITE;
+ if (vma->vm_flags & VM_EXEC)
+ prot |= PROT_EXEC;
+
+ if (vma->vm_flags & VM_MAYSHARE)
+ flags = MAP_SHARED;
+ else
+ flags = MAP_PRIVATE;
+
+ if (vma->vm_flags & VM_DENYWRITE)
+ flags |= MAP_DENYWRITE;
+ if (vma->vm_flags & VM_MAYEXEC)
+ flags |= MAP_EXECUTABLE;
+ if (vma->vm_flags & VM_LOCKED)
+ flags |= MAP_LOCKED;
+ if (vma->vm_flags & VM_HUGETLB)
+ flags |= MAP_HUGETLB;
+
goto got_name;
} else {
name = (char *)arch_vma_name(vma);
@@ -5263,6 +5292,8 @@ got_name:
mmap_event->min = min;
mmap_event->ino = ino;
mmap_event->ino_generation = gen;
+ mmap_event->prot = prot;
+ mmap_event->flags = flags;
if (!(vma->vm_flags & VM_EXEC))
mmap_event->event_id.header.misc |= PERF_RECORD_MISC_MMAP_DATA;
@@ -5303,6 +5334,8 @@ void perf_event_mmap(struct vm_area_struct *vma)
/* .min (attr_mmap2 only) */
/* .ino (attr_mmap2 only) */
/* .ino_generation (attr_mmap2 only) */
+ /* .prot (attr_mmap2 only) */
+ /* .flags (attr_mmap2 only) */
};
perf_event_mmap_event(&mmap_event);
--
1.8.3.1
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH 2/9] Revert "perf: Disable PERF_RECORD_MMAP2 support"
2014-05-28 13:20 [GIT PULL 0/9] perf/core improvements and fixes Jiri Olsa
2014-05-28 13:20 ` [PATCH 1/9] perf: Pass protection and flags bits through mmap2 interface Jiri Olsa
@ 2014-05-28 13:20 ` Jiri Olsa
2014-05-28 13:20 ` [PATCH 3/9] perf tools: Update mmap2 interface with protection and flag bits Jiri Olsa
` (6 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: Jiri Olsa @ 2014-05-28 13:20 UTC (permalink / raw)
To: Ingo Molnar; +Cc: linux-kernel, Don Zickus, Jiri Olsa
From: Don Zickus <dzickus@redhat.com>
This reverts commit 3090ffb5a2515990182f3f55b0688a7817325488.
Re-enable the mmap2 interface as we will have a user soon.
Since things have changed since perf disabled mmap2, small tweaks
to the revert had to be done:
o commit 9d4ecc88 forced (n!=8) to become (n<7)
o a new libunwind test needed updating to use mmap2 interface
Signed-off-by: Don Zickus <dzickus@redhat.com>
Link: http://lkml.kernel.org/r/1400526833-141779-3-git-send-email-dzickus@redhat.com
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
kernel/events/core.c | 4 ----
tools/perf/tests/dwarf-unwind.c | 2 +-
tools/perf/util/event.c | 36 +++++++++++++++++++-----------------
tools/perf/util/evsel.c | 1 +
4 files changed, 21 insertions(+), 22 deletions(-)
diff --git a/kernel/events/core.c b/kernel/events/core.c
index cd68f49..57edc51 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -6909,10 +6909,6 @@ static int perf_copy_attr(struct perf_event_attr __user *uattr,
if (ret)
return -EFAULT;
- /* disabled for now */
- if (attr->mmap2)
- return -EINVAL;
-
if (attr->__reserved_1)
return -EINVAL;
diff --git a/tools/perf/tests/dwarf-unwind.c b/tools/perf/tests/dwarf-unwind.c
index 108f0cd..96adb73 100644
--- a/tools/perf/tests/dwarf-unwind.c
+++ b/tools/perf/tests/dwarf-unwind.c
@@ -15,7 +15,7 @@ static int mmap_handler(struct perf_tool *tool __maybe_unused,
struct perf_sample *sample __maybe_unused,
struct machine *machine)
{
- return machine__process_mmap_event(machine, event, NULL);
+ return machine__process_mmap2_event(machine, event, NULL);
}
static int init_live_machine(struct machine *machine)
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 65795b8..5e7c722 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -178,13 +178,14 @@ int perf_event__synthesize_mmap_events(struct perf_tool *tool,
return -1;
}
- event->header.type = PERF_RECORD_MMAP;
+ event->header.type = PERF_RECORD_MMAP2;
while (1) {
char bf[BUFSIZ];
char prot[5];
char execname[PATH_MAX];
char anonstr[] = "//anon";
+ unsigned int ino;
size_t size;
ssize_t n;
@@ -195,14 +196,15 @@ int perf_event__synthesize_mmap_events(struct perf_tool *tool,
strcpy(execname, "");
/* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
- n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %*x:%*x %*u %s\n",
- &event->mmap.start, &event->mmap.len, prot,
- &event->mmap.pgoff,
- execname);
- /*
- * Anon maps don't have the execname.
- */
- if (n < 4)
+ n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %s\n",
+ &event->mmap2.start, &event->mmap2.len, prot,
+ &event->mmap2.pgoff, &event->mmap2.maj,
+ &event->mmap2.min,
+ &ino, execname);
+
+ event->mmap2.ino = (u64)ino;
+
+ if (n < 7)
continue;
/*
* Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
@@ -223,15 +225,15 @@ int perf_event__synthesize_mmap_events(struct perf_tool *tool,
strcpy(execname, anonstr);
size = strlen(execname) + 1;
- memcpy(event->mmap.filename, execname, size);
+ memcpy(event->mmap2.filename, execname, size);
size = PERF_ALIGN(size, sizeof(u64));
- event->mmap.len -= event->mmap.start;
- event->mmap.header.size = (sizeof(event->mmap) -
- (sizeof(event->mmap.filename) - size));
- memset(event->mmap.filename + size, 0, machine->id_hdr_size);
- event->mmap.header.size += machine->id_hdr_size;
- event->mmap.pid = tgid;
- event->mmap.tid = pid;
+ event->mmap2.len -= event->mmap.start;
+ event->mmap2.header.size = (sizeof(event->mmap2) -
+ (sizeof(event->mmap2.filename) - size));
+ memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
+ event->mmap2.header.size += machine->id_hdr_size;
+ event->mmap2.pid = tgid;
+ event->mmap2.tid = pid;
if (process(tool, event, &synth_sample, machine) != 0) {
rc = -1;
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 5c28d82..21154da 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -659,6 +659,7 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts)
perf_evsel__set_sample_bit(evsel, WEIGHT);
attr->mmap = track;
+ attr->mmap2 = track && !perf_missing_features.mmap2;
attr->comm = track;
if (opts->sample_transaction)
--
1.8.3.1
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH 3/9] perf tools: Update mmap2 interface with protection and flag bits
2014-05-28 13:20 [GIT PULL 0/9] perf/core improvements and fixes Jiri Olsa
2014-05-28 13:20 ` [PATCH 1/9] perf: Pass protection and flags bits through mmap2 interface Jiri Olsa
2014-05-28 13:20 ` [PATCH 2/9] Revert "perf: Disable PERF_RECORD_MMAP2 support" Jiri Olsa
@ 2014-05-28 13:20 ` Jiri Olsa
2014-05-28 13:20 ` [PATCH 4/9] perf report: Add mem-mode documentation to report command Jiri Olsa
` (5 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: Jiri Olsa @ 2014-05-28 13:20 UTC (permalink / raw)
To: Ingo Molnar; +Cc: linux-kernel, Don Zickus, Jiri Olsa
From: Don Zickus <dzickus@redhat.com>
The kernel piece passes more info now. Update the perf tool to reflect
that and adjust the synthesized maps to play along.
Signed-off-by: Don Zickus <dzickus@redhat.com>
Link: http://lkml.kernel.org/r/1400526833-141779-4-git-send-email-dzickus@redhat.com
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/util/event.c | 23 +++++++++++++++++++++--
tools/perf/util/event.h | 2 ++
tools/perf/util/machine.c | 4 +++-
tools/perf/util/map.c | 4 +++-
tools/perf/util/map.h | 4 +++-
5 files changed, 32 insertions(+), 5 deletions(-)
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 5e7c722..e91d28e 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -1,4 +1,5 @@
#include <linux/types.h>
+#include <sys/mman.h>
#include "event.h"
#include "debug.h"
#include "hist.h"
@@ -214,6 +215,21 @@ int perf_event__synthesize_mmap_events(struct perf_tool *tool,
else
event->header.misc = PERF_RECORD_MISC_GUEST_USER;
+ /* map protection and flags bits */
+ event->mmap2.prot = 0;
+ event->mmap2.flags = 0;
+ if (prot[0] == 'r')
+ event->mmap2.prot |= PROT_READ;
+ if (prot[1] == 'w')
+ event->mmap2.prot |= PROT_WRITE;
+ if (prot[2] == 'x')
+ event->mmap2.prot |= PROT_EXEC;
+
+ if (prot[3] == 's')
+ event->mmap2.flags |= MAP_SHARED;
+ else
+ event->mmap2.flags |= MAP_PRIVATE;
+
if (prot[2] != 'x') {
if (!mmap_data || prot[0] != 'r')
continue;
@@ -614,12 +630,15 @@ size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
{
return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64
- " %02x:%02x %"PRIu64" %"PRIu64"]: %c %s\n",
+ " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n",
event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
event->mmap2.min, event->mmap2.ino,
event->mmap2.ino_generation,
- (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
+ (event->mmap2.prot & PROT_READ) ? 'r' : '-',
+ (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
+ (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
+ (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
event->mmap2.filename);
}
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index d970232..9ba2eb3 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -27,6 +27,8 @@ struct mmap2_event {
u32 min;
u64 ino;
u64 ino_generation;
+ u32 prot;
+ u32 flags;
char filename[PATH_MAX];
};
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 7409ac8..0e5fea9 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -1060,6 +1060,8 @@ int machine__process_mmap2_event(struct machine *machine,
event->mmap2.pid, event->mmap2.maj,
event->mmap2.min, event->mmap2.ino,
event->mmap2.ino_generation,
+ event->mmap2.prot,
+ event->mmap2.flags,
event->mmap2.filename, type);
if (map == NULL)
@@ -1105,7 +1107,7 @@ int machine__process_mmap_event(struct machine *machine, union perf_event *event
map = map__new(&machine->user_dsos, event->mmap.start,
event->mmap.len, event->mmap.pgoff,
- event->mmap.pid, 0, 0, 0, 0,
+ event->mmap.pid, 0, 0, 0, 0, 0, 0,
event->mmap.filename,
type);
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index 8ccbb32..25c571f 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -138,7 +138,7 @@ void map__init(struct map *map, enum map_type type,
struct map *map__new(struct list_head *dsos__list, u64 start, u64 len,
u64 pgoff, u32 pid, u32 d_maj, u32 d_min, u64 ino,
- u64 ino_gen, char *filename,
+ u64 ino_gen, u32 prot, u32 flags, char *filename,
enum map_type type)
{
struct map *map = malloc(sizeof(*map));
@@ -157,6 +157,8 @@ struct map *map__new(struct list_head *dsos__list, u64 start, u64 len,
map->min = d_min;
map->ino = ino;
map->ino_generation = ino_gen;
+ map->prot = prot;
+ map->flags = flags;
if ((anon || no_dso) && type == MAP__FUNCTION) {
snprintf(newfilename, sizeof(newfilename), "/tmp/perf-%d.map", pid);
diff --git a/tools/perf/util/map.h b/tools/perf/util/map.h
index ae2d451..7758c72 100644
--- a/tools/perf/util/map.h
+++ b/tools/perf/util/map.h
@@ -35,6 +35,8 @@ struct map {
bool referenced;
bool erange_warned;
u32 priv;
+ u32 prot;
+ u32 flags;
u64 pgoff;
u64 reloc;
u32 maj, min; /* only valid for MMAP2 record */
@@ -118,7 +120,7 @@ void map__init(struct map *map, enum map_type type,
u64 start, u64 end, u64 pgoff, struct dso *dso);
struct map *map__new(struct list_head *dsos__list, u64 start, u64 len,
u64 pgoff, u32 pid, u32 d_maj, u32 d_min, u64 ino,
- u64 ino_gen,
+ u64 ino_gen, u32 prot, u32 flags,
char *filename, enum map_type type);
struct map *map__new2(u64 start, struct dso *dso, enum map_type type);
void map__delete(struct map *map);
--
1.8.3.1
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH 4/9] perf report: Add mem-mode documentation to report command
2014-05-28 13:20 [GIT PULL 0/9] perf/core improvements and fixes Jiri Olsa
` (2 preceding siblings ...)
2014-05-28 13:20 ` [PATCH 3/9] perf tools: Update mmap2 interface with protection and flag bits Jiri Olsa
@ 2014-05-28 13:20 ` Jiri Olsa
2014-05-28 13:20 ` [PATCH 5/9] perf trace: Warn the user when not available Jiri Olsa
` (4 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: Jiri Olsa @ 2014-05-28 13:20 UTC (permalink / raw)
To: Ingo Molnar; +Cc: linux-kernel, Don Zickus, Jiri Olsa
From: Don Zickus <dzickus@redhat.com>
Add mem-mode sorting types and mem-mode itself to perf-report documentation.
Signed-off-by: Don Zickus <dzickus@redhat.com>
Link: http://lkml.kernel.org/r/1400526833-141779-5-git-send-email-dzickus@redhat.com
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/Documentation/perf-report.txt | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index a1b5185..4986bde 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -117,6 +117,21 @@ OPTIONS
By default, every sort keys not specified in -F will be appended
automatically.
+ If --mem-mode option is used, following sort keys are also available
+ (incompatible with --branch-stack):
+ symbol_daddr, dso_daddr, locked, tlb, mem, snoop.
+
+ - symbol_daddr: name of data symbol being executed on at the time of sample
+ - dso_daddr: name of library or module containing the data being executed
+ on at the time of sample
+ - locked: whether the bus was locked at the time of sample
+ - tlb: type of tlb access for the data at the time of sample
+ - mem: type of memory access for the data at the time of sample
+ - snoop: type of snoop (if any) for the data at the time of sample
+
+ And default sort keys are changed to local_weight, mem, sym, dso,
+ symbol_daddr, dso_daddr, snoop, tlb, locked, see '--mem-mode'.
+
-p::
--parent=<regex>::
A regex filter to identify parent. The parent is a caller of this
@@ -255,6 +270,13 @@ OPTIONS
Demangle symbol names to human readable form. It's enabled by default,
disable with --no-demangle.
+--mem-mode::
+ Use the data addresses of samples in addition to instruction addresses
+ to build the histograms. To generate meaningful output, the perf.data
+ file must have been obtained using perf record -d -W and using a
+ special event -e cpu/mem-loads/ or -e cpu/mem-stores/. See
+ 'perf mem' for simpler access.
+
--percent-limit::
Do not show entries which have an overhead under that percent.
(Default: 0).
--
1.8.3.1
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH 5/9] perf trace: Warn the user when not available
2014-05-28 13:20 [GIT PULL 0/9] perf/core improvements and fixes Jiri Olsa
` (3 preceding siblings ...)
2014-05-28 13:20 ` [PATCH 4/9] perf report: Add mem-mode documentation to report command Jiri Olsa
@ 2014-05-28 13:20 ` Jiri Olsa
2014-05-28 13:20 ` [PATCH 6/9] perf tools: Add warning when disabling perl scripting support due to missing devel files Jiri Olsa
` (3 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: Jiri Olsa @ 2014-05-28 13:20 UTC (permalink / raw)
To: Ingo Molnar
Cc: linux-kernel, Arnaldo Carvalho de Melo, Adrian Hunter,
David Ahern, Don Zickus, Frederic Weisbecker, Mike Galbraith,
Namhyung Kim, Paul Mackerras, Peter Zijlstra, Stephane Eranian,
Jiri Olsa
From: Arnaldo Carvalho de Melo <acme@redhat.com>
When the audit-libs devel package is not found at build time we disable
the 'trace' command, as we are not able to map syscall numbers to
strings, but then the message the user is presented is cryptic:
[root@zoo linux]# trace ls
perf: 'ls' is not a perf-command. See 'perf --help'.
Fix it by presenting a more helpful message:
[root@zoo linux]# trace l
trace command not available: missing audit-libs devel package at build time.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-uxeunqetd0sgxyibusapen9a@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/perf.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index 431798a..78f7b92 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -481,14 +481,18 @@ int main(int argc, const char **argv)
fprintf(stderr, "cannot handle %s internally", cmd);
goto out;
}
-#ifdef HAVE_LIBAUDIT_SUPPORT
if (!prefixcmp(cmd, "trace")) {
+#ifdef HAVE_LIBAUDIT_SUPPORT
set_buildid_dir();
setup_path();
argv[0] = "trace";
return cmd_trace(argc, argv, NULL);
- }
+#else
+ fprintf(stderr,
+ "trace command not available: missing audit-libs devel package at build time.\n");
+ goto out;
#endif
+ }
/* Look for flags.. */
argv++;
argc--;
--
1.8.3.1
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH 6/9] perf tools: Add warning when disabling perl scripting support due to missing devel files
2014-05-28 13:20 [GIT PULL 0/9] perf/core improvements and fixes Jiri Olsa
` (4 preceding siblings ...)
2014-05-28 13:20 ` [PATCH 5/9] perf trace: Warn the user when not available Jiri Olsa
@ 2014-05-28 13:20 ` Jiri Olsa
2014-05-28 13:21 ` [PATCH 7/9] perf tools: Consider header files outside perf directory in tags target Jiri Olsa
` (2 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: Jiri Olsa @ 2014-05-28 13:20 UTC (permalink / raw)
To: Ingo Molnar
Cc: linux-kernel, Arnaldo Carvalho de Melo, Adrian Hunter,
David Ahern, Don Zickus, Frederic Weisbecker, Mike Galbraith,
Namhyung Kim, Paul Mackerras, Peter Zijlstra, Stephane Eranian,
Jiri Olsa
From: Arnaldo Carvalho de Melo <acme@redhat.com>
We were just showing "libperl: OFF", unlike other features where we
present the user with a message helping have a feature built in.
Fix it by adding the following message:
config/Makefile:450: Missing perl devel files. Disabling perl scripting support, consider installing perl-ExtUtils-Embed
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-t7yeud34ehimlfi6pklb29p7@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/config/Makefile | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
index 729bbdf..319426f 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
@@ -447,6 +447,7 @@ else
ifneq ($(feature-libperl), 1)
CFLAGS += -DNO_LIBPERL
NO_LIBPERL := 1
+ msg := $(warning Missing perl devel files. Disabling perl scripting support, consider installing perl-ExtUtils-Embed);
else
LDFLAGS += $(PERL_EMBED_LDFLAGS)
EXTLIBS += $(PERL_EMBED_LIBADD)
--
1.8.3.1
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH 7/9] perf tools: Consider header files outside perf directory in tags target
2014-05-28 13:20 [GIT PULL 0/9] perf/core improvements and fixes Jiri Olsa
` (5 preceding siblings ...)
2014-05-28 13:20 ` [PATCH 6/9] perf tools: Add warning when disabling perl scripting support due to missing devel files Jiri Olsa
@ 2014-05-28 13:21 ` Jiri Olsa
2014-05-28 13:21 ` [PATCH 8/9] perf tools: Allow overriding sysfs and proc finding with env var Jiri Olsa
2014-05-28 13:21 ` [PATCH 9/9] tools lib traceevent: Added support for __get_bitmask() macro Jiri Olsa
8 siblings, 0 replies; 10+ messages in thread
From: Jiri Olsa @ 2014-05-28 13:21 UTC (permalink / raw)
To: Ingo Molnar; +Cc: linux-kernel, Sebastian Andrzej Siewior, Jiri Olsa
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
This fixes lookups like "vi -t event_format"
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: http://lkml.kernel.org/r/20140528081918.GA28567@linutronix.de
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/Makefile.perf | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 02f0a4d..f80ec2d 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -814,17 +814,20 @@ INSTALL_DOC_TARGETS += quick-install-doc quick-install-man quick-install-html
$(DOC_TARGETS):
$(QUIET_SUBDIR0)Documentation $(QUIET_SUBDIR1) $(@:doc=all)
+TAG_FOLDERS= . ../lib/traceevent ../lib/api ../lib/symbol
+TAG_FILES= ../../include/uapi/linux/perf_event.h
+
TAGS:
$(RM) TAGS
- $(FIND) . -name '*.[hcS]' -print | xargs etags -a
+ $(FIND) $(TAG_FOLDERS) -name '*.[hcS]' -print | xargs etags -a $(TAG_FILES)
tags:
$(RM) tags
- $(FIND) . -name '*.[hcS]' -print | xargs ctags -a
+ $(FIND) $(TAG_FOLDERS) -name '*.[hcS]' -print | xargs ctags -a $(TAG_FILES)
cscope:
$(RM) cscope*
- $(FIND) . -name '*.[hcS]' -print | xargs cscope -b
+ $(FIND) $(TAG_FOLDERS) -name '*.[hcS]' -print | xargs cscope -b $(TAG_FILES)
### Detect prefix changes
TRACK_CFLAGS = $(subst ','\'',$(CFLAGS)):\
--
1.8.3.1
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH 8/9] perf tools: Allow overriding sysfs and proc finding with env var
2014-05-28 13:20 [GIT PULL 0/9] perf/core improvements and fixes Jiri Olsa
` (6 preceding siblings ...)
2014-05-28 13:21 ` [PATCH 7/9] perf tools: Consider header files outside perf directory in tags target Jiri Olsa
@ 2014-05-28 13:21 ` Jiri Olsa
2014-05-28 13:21 ` [PATCH 9/9] tools lib traceevent: Added support for __get_bitmask() macro Jiri Olsa
8 siblings, 0 replies; 10+ messages in thread
From: Jiri Olsa @ 2014-05-28 13:21 UTC (permalink / raw)
To: Ingo Molnar; +Cc: linux-kernel, Cody P Schafer, Sukadev Bhattiprolu, Jiri Olsa
From: Cody P Schafer <dev@codyps.com>
SYSFS_PATH and PROC_PATH environment variables now let the user override
the detection of sysfs and proc locations for testing purposes.
CC: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: Cody P Schafer <dev@codyps.com>
Link: http://lkml.kernel.org/r/1401236684-10579-2-git-send-email-dev@codyps.com
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/lib/api/fs/fs.c | 43 ++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 42 insertions(+), 1 deletion(-)
diff --git a/tools/lib/api/fs/fs.c b/tools/lib/api/fs/fs.c
index 5b5eb78..c1b49c3 100644
--- a/tools/lib/api/fs/fs.c
+++ b/tools/lib/api/fs/fs.c
@@ -1,8 +1,10 @@
/* TODO merge/factor in debugfs.c here */
+#include <ctype.h>
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
+#include <stdlib.h>
#include <string.h>
#include <sys/vfs.h>
@@ -96,12 +98,51 @@ static bool fs__check_mounts(struct fs *fs)
return false;
}
+static void mem_toupper(char *f, size_t len)
+{
+ while (len) {
+ *f = toupper(*f);
+ f++;
+ len--;
+ }
+}
+
+/*
+ * Check for "NAME_PATH" environment variable to override fs location (for
+ * testing). This matches the recommendation in Documentation/sysfs-rules.txt
+ * for SYSFS_PATH.
+ */
+static bool fs__env_override(struct fs *fs)
+{
+ char *override_path;
+ size_t name_len = strlen(fs->name);
+ /* name + "_PATH" + '\0' */
+ char upper_name[name_len + 5 + 1];
+ memcpy(upper_name, fs->name, name_len);
+ mem_toupper(upper_name, name_len);
+ strcpy(&upper_name[name_len], "_PATH");
+
+ override_path = getenv(upper_name);
+ if (!override_path)
+ return false;
+
+ fs->found = true;
+ strncpy(fs->path, override_path, sizeof(fs->path));
+ return true;
+}
+
static const char *fs__get_mountpoint(struct fs *fs)
{
+ if (fs__env_override(fs))
+ return fs->path;
+
if (fs__check_mounts(fs))
return fs->path;
- return fs__read_mounts(fs) ? fs->path : NULL;
+ if (fs__read_mounts(fs))
+ return fs->path;
+
+ return NULL;
}
static const char *fs__mountpoint(int idx)
--
1.8.3.1
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH 9/9] tools lib traceevent: Added support for __get_bitmask() macro
2014-05-28 13:20 [GIT PULL 0/9] perf/core improvements and fixes Jiri Olsa
` (7 preceding siblings ...)
2014-05-28 13:21 ` [PATCH 8/9] perf tools: Allow overriding sysfs and proc finding with env var Jiri Olsa
@ 2014-05-28 13:21 ` Jiri Olsa
8 siblings, 0 replies; 10+ messages in thread
From: Jiri Olsa @ 2014-05-28 13:21 UTC (permalink / raw)
To: Ingo Molnar; +Cc: linux-kernel, Steven Rostedt (Red Hat), Jiri Olsa
From: "Steven Rostedt (Red Hat)" <rostedt@goodmis.org>
Coming in v3.16, trace events will be able to save bitmasks in raw
format in the ring buffer and output it with the __get_bitmask() macro.
In order for userspace tools to parse this, it must be able to handle
the __get_bitmask() call and be able to convert the data that's in
the ring buffer into a nice bitmask format. The output is similar to
what the kernel uses to print bitmasks, with a comma separator every
4 bytes (8 characters).
This allows for cpumasks to also be saved efficiently.
The first user is the thermal:thermal_power_limit event which has the
following output:
thermal_power_limit: cpus=0000000f freq=1900000 cdev_state=0 power=5252
Link: http://lkml.kernel.org/r/20140506132238.22e136d1@gandalf.local.home
Suggested-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Tested-by: Javi Merino <javi.merino@arm.com>
Link: http://lkml.kernel.org/r/20140516140502.628373326@goodmis.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/lib/traceevent/event-parse.c | 113 +++++++++++++++++++++
tools/lib/traceevent/event-parse.h | 7 ++
.../perf/util/scripting-engines/trace-event-perl.c | 1 +
.../util/scripting-engines/trace-event-python.c | 1 +
4 files changed, 122 insertions(+)
diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index b83184f..2d6aa92 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -765,6 +765,9 @@ static void free_arg(struct print_arg *arg)
case PRINT_BSTRING:
free(arg->string.string);
break;
+ case PRINT_BITMASK:
+ free(arg->bitmask.bitmask);
+ break;
case PRINT_DYNAMIC_ARRAY:
free(arg->dynarray.index);
break;
@@ -2268,6 +2271,7 @@ static int arg_num_eval(struct print_arg *arg, long long *val)
case PRINT_FIELD ... PRINT_SYMBOL:
case PRINT_STRING:
case PRINT_BSTRING:
+ case PRINT_BITMASK:
default:
do_warning("invalid eval type %d", arg->type);
ret = 0;
@@ -2296,6 +2300,7 @@ static char *arg_eval (struct print_arg *arg)
case PRINT_FIELD ... PRINT_SYMBOL:
case PRINT_STRING:
case PRINT_BSTRING:
+ case PRINT_BITMASK:
default:
do_warning("invalid eval type %d", arg->type);
break;
@@ -2683,6 +2688,35 @@ process_str(struct event_format *event __maybe_unused, struct print_arg *arg,
return EVENT_ERROR;
}
+static enum event_type
+process_bitmask(struct event_format *event __maybe_unused, struct print_arg *arg,
+ char **tok)
+{
+ enum event_type type;
+ char *token;
+
+ if (read_expect_type(EVENT_ITEM, &token) < 0)
+ goto out_free;
+
+ arg->type = PRINT_BITMASK;
+ arg->bitmask.bitmask = token;
+ arg->bitmask.offset = -1;
+
+ if (read_expected(EVENT_DELIM, ")") < 0)
+ goto out_err;
+
+ type = read_token(&token);
+ *tok = token;
+
+ return type;
+
+ out_free:
+ free_token(token);
+ out_err:
+ *tok = NULL;
+ return EVENT_ERROR;
+}
+
static struct pevent_function_handler *
find_func_handler(struct pevent *pevent, char *func_name)
{
@@ -2797,6 +2831,10 @@ process_function(struct event_format *event, struct print_arg *arg,
free_token(token);
return process_str(event, arg, tok);
}
+ if (strcmp(token, "__get_bitmask") == 0) {
+ free_token(token);
+ return process_bitmask(event, arg, tok);
+ }
if (strcmp(token, "__get_dynamic_array") == 0) {
free_token(token);
return process_dynamic_array(event, arg, tok);
@@ -3324,6 +3362,7 @@ eval_num_arg(void *data, int size, struct event_format *event, struct print_arg
return eval_type(val, arg, 0);
case PRINT_STRING:
case PRINT_BSTRING:
+ case PRINT_BITMASK:
return 0;
case PRINT_FUNC: {
struct trace_seq s;
@@ -3556,6 +3595,60 @@ static void print_str_to_seq(struct trace_seq *s, const char *format,
trace_seq_printf(s, format, str);
}
+static void print_bitmask_to_seq(struct pevent *pevent,
+ struct trace_seq *s, const char *format,
+ int len_arg, const void *data, int size)
+{
+ int nr_bits = size * 8;
+ int str_size = (nr_bits + 3) / 4;
+ int len = 0;
+ char buf[3];
+ char *str;
+ int index;
+ int i;
+
+ /*
+ * The kernel likes to put in commas every 32 bits, we
+ * can do the same.
+ */
+ str_size += (nr_bits - 1) / 32;
+
+ str = malloc(str_size + 1);
+ if (!str) {
+ do_warning("%s: not enough memory!", __func__);
+ return;
+ }
+ str[str_size] = 0;
+
+ /* Start out with -2 for the two chars per byte */
+ for (i = str_size - 2; i >= 0; i -= 2) {
+ /*
+ * data points to a bit mask of size bytes.
+ * In the kernel, this is an array of long words, thus
+ * endianess is very important.
+ */
+ if (pevent->file_bigendian)
+ index = size - (len + 1);
+ else
+ index = len;
+
+ snprintf(buf, 3, "%02x", *((unsigned char *)data + index));
+ memcpy(str + i, buf, 2);
+ len++;
+ if (!(len & 3) && i > 0) {
+ i--;
+ str[i] = ',';
+ }
+ }
+
+ if (len_arg >= 0)
+ trace_seq_printf(s, format, len_arg, str);
+ else
+ trace_seq_printf(s, format, str);
+
+ free(str);
+}
+
static void print_str_arg(struct trace_seq *s, void *data, int size,
struct event_format *event, const char *format,
int len_arg, struct print_arg *arg)
@@ -3691,6 +3784,23 @@ static void print_str_arg(struct trace_seq *s, void *data, int size,
case PRINT_BSTRING:
print_str_to_seq(s, format, len_arg, arg->string.string);
break;
+ case PRINT_BITMASK: {
+ int bitmask_offset;
+ int bitmask_size;
+
+ if (arg->bitmask.offset == -1) {
+ struct format_field *f;
+
+ f = pevent_find_any_field(event, arg->bitmask.bitmask);
+ arg->bitmask.offset = f->offset;
+ }
+ bitmask_offset = data2host4(pevent, data + arg->string.offset);
+ bitmask_size = bitmask_offset >> 16;
+ bitmask_offset &= 0xffff;
+ print_bitmask_to_seq(pevent, s, format, len_arg,
+ data + bitmask_offset, bitmask_size);
+ break;
+ }
case PRINT_OP:
/*
* The only op for string should be ? :
@@ -4822,6 +4932,9 @@ static void print_args(struct print_arg *args)
case PRINT_BSTRING:
printf("__get_str(%s)", args->string.string);
break;
+ case PRINT_BITMASK:
+ printf("__get_bitmask(%s)", args->bitmask.bitmask);
+ break;
case PRINT_TYPE:
printf("(%s)", args->typecast.type);
print_args(args->typecast.item);
diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h
index feab942..fb3b415 100644
--- a/tools/lib/traceevent/event-parse.h
+++ b/tools/lib/traceevent/event-parse.h
@@ -208,6 +208,11 @@ struct print_arg_string {
int offset;
};
+struct print_arg_bitmask {
+ char *bitmask;
+ int offset;
+};
+
struct print_arg_field {
char *name;
struct format_field *field;
@@ -274,6 +279,7 @@ enum print_arg_type {
PRINT_DYNAMIC_ARRAY,
PRINT_OP,
PRINT_FUNC,
+ PRINT_BITMASK,
};
struct print_arg {
@@ -288,6 +294,7 @@ struct print_arg {
struct print_arg_hex hex;
struct print_arg_func func;
struct print_arg_string string;
+ struct print_arg_bitmask bitmask;
struct print_arg_op op;
struct print_arg_dynarray dynarray;
};
diff --git a/tools/perf/util/scripting-engines/trace-event-perl.c b/tools/perf/util/scripting-engines/trace-event-perl.c
index e108207..af7da56 100644
--- a/tools/perf/util/scripting-engines/trace-event-perl.c
+++ b/tools/perf/util/scripting-engines/trace-event-perl.c
@@ -215,6 +215,7 @@ static void define_event_symbols(struct event_format *event,
case PRINT_BSTRING:
case PRINT_DYNAMIC_ARRAY:
case PRINT_STRING:
+ case PRINT_BITMASK:
break;
case PRINT_TYPE:
define_event_symbols(event, ev_name, args->typecast.item);
diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
index cd9774d..c3de097 100644
--- a/tools/perf/util/scripting-engines/trace-event-python.c
+++ b/tools/perf/util/scripting-engines/trace-event-python.c
@@ -197,6 +197,7 @@ static void define_event_symbols(struct event_format *event,
case PRINT_BSTRING:
case PRINT_DYNAMIC_ARRAY:
case PRINT_FUNC:
+ case PRINT_BITMASK:
/* we should warn... */
return;
}
--
1.8.3.1
^ permalink raw reply related [flat|nested] 10+ messages in thread