* [PATCH v3 01/15] perf header: encapsulate read and swap
2017-06-06 7:07 [PATCH v3 00/15] perf tool: add meta-data header support for pipe-mode David Carrillo-Cisneros
@ 2017-06-06 7:07 ` David Carrillo-Cisneros
2017-06-06 7:07 ` [PATCH v3 02/15] perf header: add PROCESS_STR_FUN macro David Carrillo-Cisneros
` (14 subsequent siblings)
15 siblings, 0 replies; 27+ messages in thread
From: David Carrillo-Cisneros @ 2017-06-06 7:07 UTC (permalink / raw)
To: linux-kernel
Cc: Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo,
Alexander Shishkin, Andi Kleen, Simon Que, Wang Nan, Jiri Olsa,
He Kuang, Masami Hiramatsu, Stephane Eranian, Paul Turner,
David Carrillo-Cisneros
Most callers of readn in perf header read either a 32 or a 64 bits
number, error check it and swap it, if necessary.
Create do_read_u32 and do_read_u64 to simplify these use cases.
Signed-off-by: David Carrillo-Cisneros <davidcc@google.com>
---
| 210 +++++++++++++++++------------------------------
1 file changed, 77 insertions(+), 133 deletions(-)
--git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 314a07151fb7..afd1316f6b51 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -118,25 +118,54 @@ static int do_write_string(int fd, const char *str)
return write_padded(fd, str, olen, len);
}
+static int __do_read(int fd, void *addr, ssize_t size)
+{
+ ssize_t ret = readn(fd, addr, size);
+
+ if (ret != size)
+ return ret < 0 ? (int)ret : -1;
+ return 0;
+}
+
+static int do_read_u32(int fd, struct perf_header *ph, u32 *addr)
+{
+ int ret;
+
+ ret = __do_read(fd, addr, sizeof(*addr));
+ if (ret)
+ return ret;
+
+ if (ph->needs_swap)
+ *addr = bswap_32(*addr);
+ return 0;
+}
+
+static int do_read_u64(int fd, struct perf_header *ph, u64 *addr)
+{
+ int ret;
+
+ ret = __do_read(fd, addr, sizeof(*addr));
+ if (ret)
+ return ret;
+
+ if (ph->needs_swap)
+ *addr = bswap_64(*addr);
+ return 0;
+}
+
static char *do_read_string(int fd, struct perf_header *ph)
{
- ssize_t sz, ret;
u32 len;
char *buf;
- sz = readn(fd, &len, sizeof(len));
- if (sz < (ssize_t)sizeof(len))
+ if (do_read_u32(fd, ph, &len))
return NULL;
- if (ph->needs_swap)
- len = bswap_32(len);
-
buf = malloc(len);
if (!buf)
return NULL;
- ret = readn(fd, buf, len);
- if (ret == (ssize_t)len) {
+ if (!__do_read(fd, buf, len)) {
/*
* strings are padded by zeroes
* thus the actual strlen of buf
@@ -1187,24 +1216,15 @@ read_event_desc(struct perf_header *ph, int fd)
u64 *id;
void *buf = NULL;
u32 nre, sz, nr, i, j;
- ssize_t ret;
size_t msz;
/* number of events */
- ret = readn(fd, &nre, sizeof(nre));
- if (ret != (ssize_t)sizeof(nre))
+ if (do_read_u32(fd, ph, &nre))
goto error;
- if (ph->needs_swap)
- nre = bswap_32(nre);
-
- ret = readn(fd, &sz, sizeof(sz));
- if (ret != (ssize_t)sizeof(sz))
+ if (do_read_u32(fd, ph, &sz))
goto error;
- if (ph->needs_swap)
- sz = bswap_32(sz);
-
/* buffer to hold on file attr struct */
buf = malloc(sz);
if (!buf)
@@ -1226,8 +1246,7 @@ read_event_desc(struct perf_header *ph, int fd)
* must read entire on-file attr struct to
* sync up with layout.
*/
- ret = readn(fd, buf, sz);
- if (ret != (ssize_t)sz)
+ if (__do_read(fd, buf, sz))
goto error;
if (ph->needs_swap)
@@ -1235,16 +1254,15 @@ read_event_desc(struct perf_header *ph, int fd)
memcpy(&evsel->attr, buf, msz);
- ret = readn(fd, &nr, sizeof(nr));
- if (ret != (ssize_t)sizeof(nr))
+ if (do_read_u32(fd, ph, &nr))
goto error;
- if (ph->needs_swap) {
- nr = bswap_32(nr);
+ if (ph->needs_swap)
evsel->needs_swap = true;
- }
evsel->name = do_read_string(fd, ph);
+ if (!evsel->name)
+ goto error;
if (!nr)
continue;
@@ -1256,11 +1274,8 @@ read_event_desc(struct perf_header *ph, int fd)
evsel->id = id;
for (j = 0 ; j < nr; j++) {
- ret = readn(fd, id, sizeof(*id));
- if (ret != (ssize_t)sizeof(*id))
+ if (do_read_u64(fd, ph, id))
goto error;
- if (ph->needs_swap)
- *id = bswap_64(*id);
id++;
}
}
@@ -1632,26 +1647,18 @@ static int process_nrcpus(struct perf_file_section *section __maybe_unused,
struct perf_header *ph, int fd,
void *data __maybe_unused)
{
- ssize_t ret;
- u32 nr;
-
- ret = readn(fd, &nr, sizeof(nr));
- if (ret != sizeof(nr))
- return -1;
-
- if (ph->needs_swap)
- nr = bswap_32(nr);
-
- ph->env.nr_cpus_avail = nr;
-
- ret = readn(fd, &nr, sizeof(nr));
- if (ret != sizeof(nr))
- return -1;
+ int ret;
+ u32 nr_cpus_avail, nr_cpus_online;
- if (ph->needs_swap)
- nr = bswap_32(nr);
+ ret = do_read_u32(fd, ph, &nr_cpus_avail);
+ if (ret)
+ return ret;
- ph->env.nr_cpus_online = nr;
+ ret = do_read_u32(fd, ph, &nr_cpus_online);
+ if (ret)
+ return ret;
+ ph->env.nr_cpus_avail = (int)nr_cpus_avail;
+ ph->env.nr_cpus_online = (int)nr_cpus_online;
return 0;
}
@@ -1675,17 +1682,13 @@ static int process_total_mem(struct perf_file_section *section __maybe_unused,
struct perf_header *ph, int fd,
void *data __maybe_unused)
{
- uint64_t mem;
- ssize_t ret;
+ u64 total_mem;
+ int ret;
- ret = readn(fd, &mem, sizeof(mem));
- if (ret != sizeof(mem))
+ ret = do_read_u64(fd, ph, &total_mem);
+ if (ret)
return -1;
-
- if (ph->needs_swap)
- mem = bswap_64(mem);
-
- ph->env.total_mem = mem;
+ ph->env.total_mem = (unsigned long long)total_mem;
return 0;
}
@@ -1745,17 +1748,12 @@ static int process_cmdline(struct perf_file_section *section,
struct perf_header *ph, int fd,
void *data __maybe_unused)
{
- ssize_t ret;
char *str, *cmdline = NULL, **argv = NULL;
u32 nr, i, len = 0;
- ret = readn(fd, &nr, sizeof(nr));
- if (ret != sizeof(nr))
+ if (do_read_u32(fd, ph, &nr))
return -1;
- if (ph->needs_swap)
- nr = bswap_32(nr);
-
ph->env.nr_cmdline = nr;
cmdline = zalloc(section->size + nr + 1);
@@ -1790,7 +1788,6 @@ static int process_cpu_topology(struct perf_file_section *section,
struct perf_header *ph, int fd,
void *data __maybe_unused)
{
- ssize_t ret;
u32 nr, i;
char *str;
struct strbuf sb;
@@ -1801,13 +1798,9 @@ static int process_cpu_topology(struct perf_file_section *section,
if (!ph->env.cpu)
return -1;
- ret = readn(fd, &nr, sizeof(nr));
- if (ret != sizeof(nr))
+ if (do_read_u32(fd, ph, &nr))
goto free_cpu;
- if (ph->needs_swap)
- nr = bswap_32(nr);
-
ph->env.nr_sibling_cores = nr;
size += sizeof(u32);
if (strbuf_init(&sb, 128) < 0)
@@ -1826,13 +1819,9 @@ static int process_cpu_topology(struct perf_file_section *section,
}
ph->env.sibling_cores = strbuf_detach(&sb, NULL);
- ret = readn(fd, &nr, sizeof(nr));
- if (ret != sizeof(nr))
+ if (do_read_u32(fd, ph, &nr))
return -1;
- if (ph->needs_swap)
- nr = bswap_32(nr);
-
ph->env.nr_sibling_threads = nr;
size += sizeof(u32);
@@ -1859,22 +1848,14 @@ static int process_cpu_topology(struct perf_file_section *section,
}
for (i = 0; i < (u32)cpu_nr; i++) {
- ret = readn(fd, &nr, sizeof(nr));
- if (ret != sizeof(nr))
+ if (do_read_u32(fd, ph, &nr))
goto free_cpu;
- if (ph->needs_swap)
- nr = bswap_32(nr);
-
ph->env.cpu[i].core_id = nr;
- ret = readn(fd, &nr, sizeof(nr));
- if (ret != sizeof(nr))
+ if (do_read_u32(fd, ph, &nr))
goto free_cpu;
- if (ph->needs_swap)
- nr = bswap_32(nr);
-
if (nr != (u32)-1 && nr > (u32)cpu_nr) {
pr_debug("socket_id number is too big."
"You may need to upgrade the perf tool.\n");
@@ -1898,18 +1879,13 @@ static int process_numa_topology(struct perf_file_section *section __maybe_unuse
void *data __maybe_unused)
{
struct numa_node *nodes, *n;
- ssize_t ret;
u32 nr, i;
char *str;
/* nr nodes */
- ret = readn(fd, &nr, sizeof(nr));
- if (ret != sizeof(nr))
+ if (do_read_u32(fd, ph, &nr))
return -1;
- if (ph->needs_swap)
- nr = bswap_32(nr);
-
nodes = zalloc(sizeof(*nodes) * nr);
if (!nodes)
return -ENOMEM;
@@ -1918,24 +1894,15 @@ static int process_numa_topology(struct perf_file_section *section __maybe_unuse
n = &nodes[i];
/* node number */
- ret = readn(fd, &n->node, sizeof(u32));
- if (ret != sizeof(n->node))
+ if (do_read_u32(fd, ph, &n->node))
goto error;
- ret = readn(fd, &n->mem_total, sizeof(u64));
- if (ret != sizeof(u64))
+ if (do_read_u64(fd, ph, &n->mem_total))
goto error;
- ret = readn(fd, &n->mem_free, sizeof(u64));
- if (ret != sizeof(u64))
+ if (do_read_u64(fd, ph, &n->mem_free))
goto error;
- if (ph->needs_swap) {
- n->node = bswap_32(n->node);
- n->mem_total = bswap_64(n->mem_total);
- n->mem_free = bswap_64(n->mem_free);
- }
-
str = do_read_string(fd, ph);
if (!str)
goto error;
@@ -1959,19 +1926,14 @@ static int process_pmu_mappings(struct perf_file_section *section __maybe_unused
struct perf_header *ph, int fd,
void *data __maybe_unused)
{
- ssize_t ret;
char *name;
u32 pmu_num;
u32 type;
struct strbuf sb;
- ret = readn(fd, &pmu_num, sizeof(pmu_num));
- if (ret != sizeof(pmu_num))
+ if (do_read_u32(fd, ph, &pmu_num))
return -1;
- if (ph->needs_swap)
- pmu_num = bswap_32(pmu_num);
-
if (!pmu_num) {
pr_debug("pmu mappings not available\n");
return 0;
@@ -1982,10 +1944,8 @@ static int process_pmu_mappings(struct perf_file_section *section __maybe_unused
return -1;
while (pmu_num) {
- if (readn(fd, &type, sizeof(type)) != sizeof(type))
+ if (do_read_u32(fd, ph, &type))
goto error;
- if (ph->needs_swap)
- type = bswap_32(type);
name = do_read_string(fd, ph);
if (!name)
@@ -2025,12 +1985,9 @@ static int process_group_desc(struct perf_file_section *section __maybe_unused,
u32 nr_members;
} *desc;
- if (readn(fd, &nr_groups, sizeof(nr_groups)) != sizeof(nr_groups))
+ if (do_read_u32(fd, ph, &nr_groups))
return -1;
- if (ph->needs_swap)
- nr_groups = bswap_32(nr_groups);
-
ph->env.nr_groups = nr_groups;
if (!nr_groups) {
pr_debug("group desc not available\n");
@@ -2046,16 +2003,11 @@ static int process_group_desc(struct perf_file_section *section __maybe_unused,
if (!desc[i].name)
goto out_free;
- if (readn(fd, &desc[i].leader_idx, sizeof(u32)) != sizeof(u32))
+ if (do_read_u32(fd, ph, &desc[i].leader_idx))
goto out_free;
- if (readn(fd, &desc[i].nr_members, sizeof(u32)) != sizeof(u32))
+ if (do_read_u32(fd, ph, &desc[i].nr_members))
goto out_free;
-
- if (ph->needs_swap) {
- desc[i].leader_idx = bswap_32(desc[i].leader_idx);
- desc[i].nr_members = bswap_32(desc[i].nr_members);
- }
}
/*
@@ -2128,21 +2080,15 @@ static int process_cache(struct perf_file_section *section __maybe_unused,
struct cpu_cache_level *caches;
u32 cnt, i, version;
- if (readn(fd, &version, sizeof(version)) != sizeof(version))
+ if (do_read_u32(fd, ph, &version))
return -1;
- if (ph->needs_swap)
- version = bswap_32(version);
-
if (version != 1)
return -1;
- if (readn(fd, &cnt, sizeof(cnt)) != sizeof(cnt))
+ if (do_read_u32(fd, ph, &cnt))
return -1;
- if (ph->needs_swap)
- cnt = bswap_32(cnt);
-
caches = zalloc(sizeof(*caches) * cnt);
if (!caches)
return -1;
@@ -2151,10 +2097,8 @@ static int process_cache(struct perf_file_section *section __maybe_unused,
struct cpu_cache_level c;
#define _R(v) \
- if (readn(fd, &c.v, sizeof(u32)) != sizeof(u32))\
+ if (do_read_u32(fd, ph, &c.v))\
goto out_free_caches; \
- if (ph->needs_swap) \
- c.v = bswap_32(c.v); \
_R(level)
_R(line_size)
--
2.13.1.508.gb3defc5cc-goog
^ permalink raw reply related [flat|nested] 27+ messages in thread* [PATCH v3 02/15] perf header: add PROCESS_STR_FUN macro
2017-06-06 7:07 [PATCH v3 00/15] perf tool: add meta-data header support for pipe-mode David Carrillo-Cisneros
2017-06-06 7:07 ` [PATCH v3 01/15] perf header: encapsulate read and swap David Carrillo-Cisneros
@ 2017-06-06 7:07 ` David Carrillo-Cisneros
2017-06-06 7:07 ` [PATCH v3 03/15] perf header: fail on write_padded error David Carrillo-Cisneros
` (13 subsequent siblings)
15 siblings, 0 replies; 27+ messages in thread
From: David Carrillo-Cisneros @ 2017-06-06 7:07 UTC (permalink / raw)
To: linux-kernel
Cc: Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo,
Alexander Shishkin, Andi Kleen, Simon Que, Wang Nan, Jiri Olsa,
He Kuang, Masami Hiramatsu, Stephane Eranian, Paul Turner,
David Carrillo-Cisneros
Simplify code by adding a macro to handle the common case
of processing header features that are a simple string.
Signed-off-by: David Carrillo-Cisneros <davidcc@google.com>
---
| 65 +++++++++++++-----------------------------------
1 file changed, 17 insertions(+), 48 deletions(-)
--git a/tools/perf/util/header.c b/tools/perf/util/header.c
index afd1316f6b51..2ed830c9283f 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1594,6 +1594,23 @@ static int perf_header__read_build_ids(struct perf_header *header,
return err;
}
+/* Macro for features that simply need to read and store a string. */
+#define FEAT_PROCESS_STR_FUN(__feat, __feat_env) \
+static int process_##__feat(struct perf_file_section *section __maybe_unused, \
+ struct perf_header *ph, int fd, \
+ void *data __maybe_unused) \
+{\
+ ph->env.__feat_env = do_read_string(fd, ph); \
+ return ph->env.__feat_env ? 0 : -ENOMEM; \
+}
+
+FEAT_PROCESS_STR_FUN(hostname, hostname);
+FEAT_PROCESS_STR_FUN(osrelease, os_release);
+FEAT_PROCESS_STR_FUN(version, version);
+FEAT_PROCESS_STR_FUN(arch, arch);
+FEAT_PROCESS_STR_FUN(cpudesc, cpu_desc);
+FEAT_PROCESS_STR_FUN(cpuid, cpuid);
+
static int process_tracing_data(struct perf_file_section *section __maybe_unused,
struct perf_header *ph __maybe_unused,
int fd, void *data)
@@ -1611,38 +1628,6 @@ static int process_build_id(struct perf_file_section *section,
return 0;
}
-static int process_hostname(struct perf_file_section *section __maybe_unused,
- struct perf_header *ph, int fd,
- void *data __maybe_unused)
-{
- ph->env.hostname = do_read_string(fd, ph);
- return ph->env.hostname ? 0 : -ENOMEM;
-}
-
-static int process_osrelease(struct perf_file_section *section __maybe_unused,
- struct perf_header *ph, int fd,
- void *data __maybe_unused)
-{
- ph->env.os_release = do_read_string(fd, ph);
- return ph->env.os_release ? 0 : -ENOMEM;
-}
-
-static int process_version(struct perf_file_section *section __maybe_unused,
- struct perf_header *ph, int fd,
- void *data __maybe_unused)
-{
- ph->env.version = do_read_string(fd, ph);
- return ph->env.version ? 0 : -ENOMEM;
-}
-
-static int process_arch(struct perf_file_section *section __maybe_unused,
- struct perf_header *ph, int fd,
- void *data __maybe_unused)
-{
- ph->env.arch = do_read_string(fd, ph);
- return ph->env.arch ? 0 : -ENOMEM;
-}
-
static int process_nrcpus(struct perf_file_section *section __maybe_unused,
struct perf_header *ph, int fd,
void *data __maybe_unused)
@@ -1662,22 +1647,6 @@ static int process_nrcpus(struct perf_file_section *section __maybe_unused,
return 0;
}
-static int process_cpudesc(struct perf_file_section *section __maybe_unused,
- struct perf_header *ph, int fd,
- void *data __maybe_unused)
-{
- ph->env.cpu_desc = do_read_string(fd, ph);
- return ph->env.cpu_desc ? 0 : -ENOMEM;
-}
-
-static int process_cpuid(struct perf_file_section *section __maybe_unused,
- struct perf_header *ph, int fd,
- void *data __maybe_unused)
-{
- ph->env.cpuid = do_read_string(fd, ph);
- return ph->env.cpuid ? 0 : -ENOMEM;
-}
-
static int process_total_mem(struct perf_file_section *section __maybe_unused,
struct perf_header *ph, int fd,
void *data __maybe_unused)
--
2.13.1.508.gb3defc5cc-goog
^ permalink raw reply related [flat|nested] 27+ messages in thread* [PATCH v3 03/15] perf header: fail on write_padded error
2017-06-06 7:07 [PATCH v3 00/15] perf tool: add meta-data header support for pipe-mode David Carrillo-Cisneros
2017-06-06 7:07 ` [PATCH v3 01/15] perf header: encapsulate read and swap David Carrillo-Cisneros
2017-06-06 7:07 ` [PATCH v3 02/15] perf header: add PROCESS_STR_FUN macro David Carrillo-Cisneros
@ 2017-06-06 7:07 ` David Carrillo-Cisneros
2017-06-06 7:07 ` [PATCH v3 04/15] perf util: add const modifier to buf in "writen" function David Carrillo-Cisneros
` (12 subsequent siblings)
15 siblings, 0 replies; 27+ messages in thread
From: David Carrillo-Cisneros @ 2017-06-06 7:07 UTC (permalink / raw)
To: linux-kernel
Cc: Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo,
Alexander Shishkin, Andi Kleen, Simon Que, Wang Nan, Jiri Olsa,
He Kuang, Masami Hiramatsu, Stephane Eranian, Paul Turner,
David Carrillo-Cisneros
Do not proceed if write_padded error failed.
Also, add comments to remind that the return value of write_*
functions in util/header.c is an erro code and not the number
of bytes written.
Signed-off-by: David Carrillo-Cisneros <davidcc@google.com>
---
| 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 2ed830c9283f..75d8f3b83fb0 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -73,6 +73,7 @@ bool perf_header__has_feat(const struct perf_header *header, int feat)
return test_bit(feat, header->adds_features);
}
+/* Return: 0 if succeded, -ERR if failed. */
static int do_write(int fd, const void *buf, size_t size)
{
while (size) {
@@ -88,6 +89,7 @@ static int do_write(int fd, const void *buf, size_t size)
return 0;
}
+/* Return: 0 if succeded, -ERR if failed. */
int write_padded(int fd, const void *bf, size_t count, size_t count_aligned)
{
static const char zero_buf[NAME_ALIGN];
@@ -102,6 +104,7 @@ int write_padded(int fd, const void *bf, size_t count, size_t count_aligned)
#define string_size(str) \
(PERF_ALIGN((strlen(str) + 1), NAME_ALIGN) + sizeof(u32))
+/* Return: 0 if succeded, -ERR if failed. */
static int do_write_string(int fd, const char *str)
{
u32 len, olen;
@@ -3191,7 +3194,8 @@ int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd,
*/
tracing_data_put(tdata);
- write_padded(fd, NULL, 0, padding);
+ if (write_padded(fd, NULL, 0, padding))
+ return -1;
return aligned_size;
}
--
2.13.1.508.gb3defc5cc-goog
^ permalink raw reply related [flat|nested] 27+ messages in thread* [PATCH v3 04/15] perf util: add const modifier to buf in "writen" function
2017-06-06 7:07 [PATCH v3 00/15] perf tool: add meta-data header support for pipe-mode David Carrillo-Cisneros
` (2 preceding siblings ...)
2017-06-06 7:07 ` [PATCH v3 03/15] perf header: fail on write_padded error David Carrillo-Cisneros
@ 2017-06-06 7:07 ` David Carrillo-Cisneros
2017-06-06 7:07 ` [PATCH v3 05/15] perf header: revamp do_write David Carrillo-Cisneros
` (11 subsequent siblings)
15 siblings, 0 replies; 27+ messages in thread
From: David Carrillo-Cisneros @ 2017-06-06 7:07 UTC (permalink / raw)
To: linux-kernel
Cc: Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo,
Alexander Shishkin, Andi Kleen, Simon Que, Wang Nan, Jiri Olsa,
He Kuang, Masami Hiramatsu, Stephane Eranian, Paul Turner,
David Carrillo-Cisneros
Make buf in helper function "writen" constant to simplify
the life of its callers.
This requires to hack a cast of buf prior to passing it to "ion"
which is simpler than the alternative of reworking the "ion"
function to provide a read and a write paths, the latter with
constant buf argument.
Signed-off-by: David Carrillo-Cisneros <davidcc@google.com>
---
tools/perf/util/util.c | 6 ++++--
tools/perf/util/util.h | 2 +-
2 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index 28c9f335006c..0d8d7b8b2949 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -259,6 +259,7 @@ static ssize_t ion(bool is_read, int fd, void *buf, size_t n)
size_t left = n;
while (left) {
+ /* buf must be treated as const if !is_read. */
ssize_t ret = is_read ? read(fd, buf, left) :
write(fd, buf, left);
@@ -286,9 +287,10 @@ ssize_t readn(int fd, void *buf, size_t n)
/*
* Write exactly 'n' bytes or return an error.
*/
-ssize_t writen(int fd, void *buf, size_t n)
+ssize_t writen(int fd, const void *buf, size_t n)
{
- return ion(false, fd, buf, n);
+ /* ion does not modify buf. */
+ return ion(false, fd, (void *)buf, n);
}
size_t hex_width(u64 v)
diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
index 5dfb9bb6482d..fc6555e48422 100644
--- a/tools/perf/util/util.h
+++ b/tools/perf/util/util.h
@@ -49,7 +49,7 @@ int copyfile_mode(const char *from, const char *to, mode_t mode);
int copyfile_offset(int fromfd, loff_t from_ofs, int tofd, loff_t to_ofs, u64 size);
ssize_t readn(int fd, void *buf, size_t n);
-ssize_t writen(int fd, void *buf, size_t n);
+ssize_t writen(int fd, const void *buf, size_t n);
size_t hex_width(u64 v);
int hex2u64(const char *ptr, u64 *val);
--
2.13.1.508.gb3defc5cc-goog
^ permalink raw reply related [flat|nested] 27+ messages in thread* [PATCH v3 05/15] perf header: revamp do_write
2017-06-06 7:07 [PATCH v3 00/15] perf tool: add meta-data header support for pipe-mode David Carrillo-Cisneros
` (3 preceding siblings ...)
2017-06-06 7:07 ` [PATCH v3 04/15] perf util: add const modifier to buf in "writen" function David Carrillo-Cisneros
@ 2017-06-06 7:07 ` David Carrillo-Cisneros
2017-06-06 7:07 ` [PATCH v3 06/15] perf header: add struct feat_fd for write David Carrillo-Cisneros
` (10 subsequent siblings)
15 siblings, 0 replies; 27+ messages in thread
From: David Carrillo-Cisneros @ 2017-06-06 7:07 UTC (permalink / raw)
To: linux-kernel
Cc: Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo,
Alexander Shishkin, Andi Kleen, Simon Que, Wang Nan, Jiri Olsa,
He Kuang, Masami Hiramatsu, Stephane Eranian, Paul Turner,
David Carrillo-Cisneros
Now that writen takes a const buffer, use it in do_write instead
of duplicating its functionality.
Export do_write to use it consistently in header.c and
build_id.c .
Signed-off-by: David Carrillo-Cisneros <davidcc@google.com>
---
tools/perf/util/build-id.c | 2 +-
| 14 +++++---------
| 2 ++
3 files changed, 8 insertions(+), 10 deletions(-)
diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c
index 168cc49654e7..84d2ea51e557 100644
--- a/tools/perf/util/build-id.c
+++ b/tools/perf/util/build-id.c
@@ -345,7 +345,7 @@ static int write_buildid(const char *name, size_t name_len, u8 *build_id,
b.header.misc = misc;
b.header.size = sizeof(b) + len;
- err = writen(fd, &b, sizeof(b));
+ err = do_write(fd, &b, sizeof(b));
if (err < 0)
return err;
--git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 75d8f3b83fb0..1c75355bf568 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -74,17 +74,13 @@ bool perf_header__has_feat(const struct perf_header *header, int feat)
}
/* Return: 0 if succeded, -ERR if failed. */
-static int do_write(int fd, const void *buf, size_t size)
+int do_write(int fd, const void *buf, size_t size)
{
- while (size) {
- int ret = write(fd, buf, size);
-
- if (ret < 0)
- return -errno;
+ ssize_t ret;
- size -= ret;
- buf += ret;
- }
+ ret = writen(fd, buf, size);
+ if (ret != (ssize_t)size)
+ return ret < 0 ? (int)ret: -1;
return 0;
}
--git a/tools/perf/util/header.h b/tools/perf/util/header.h
index d30109b421ee..e98489c8bba7 100644
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -144,6 +144,8 @@ bool is_perf_magic(u64 magic);
#define NAME_ALIGN 64
+int do_write(int fd, const void *buf, size_t size);
+
int write_padded(int fd, const void *bf, size_t count, size_t count_aligned);
/*
--
2.13.1.508.gb3defc5cc-goog
^ permalink raw reply related [flat|nested] 27+ messages in thread* [PATCH v3 06/15] perf header: add struct feat_fd for write
2017-06-06 7:07 [PATCH v3 00/15] perf tool: add meta-data header support for pipe-mode David Carrillo-Cisneros
` (4 preceding siblings ...)
2017-06-06 7:07 ` [PATCH v3 05/15] perf header: revamp do_write David Carrillo-Cisneros
@ 2017-06-06 7:07 ` David Carrillo-Cisneros
2017-06-06 7:07 ` [PATCH v3 07/15] perf header: use struct feat_fd for print David Carrillo-Cisneros
` (9 subsequent siblings)
15 siblings, 0 replies; 27+ messages in thread
From: David Carrillo-Cisneros @ 2017-06-06 7:07 UTC (permalink / raw)
To: linux-kernel
Cc: Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo,
Alexander Shishkin, Andi Kleen, Simon Que, Wang Nan, Jiri Olsa,
He Kuang, Masami Hiramatsu, Stephane Eranian, Paul Turner,
David Carrillo-Cisneros
Introduce struct feat_fd. This patch uses it as a wrapper
around fd in write_* functions for feature headers. Next
patches will extend its functionality to other feature
header functions.
This patch does not change behavior.
Signed-off-by: David Carrillo-Cisneros <davidcc@google.com>
---
tools/perf/util/build-id.c | 8 +-
tools/perf/util/build-id.h | 4 +-
| 230 ++++++++++++++++++++++++---------------------
| 7 +-
4 files changed, 138 insertions(+), 111 deletions(-)
diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c
index 84d2ea51e557..292e90db3924 100644
--- a/tools/perf/util/build-id.c
+++ b/tools/perf/util/build-id.c
@@ -330,7 +330,7 @@ bool dso__build_id_is_kmod(const struct dso *dso, char *bf, size_t size)
else
static int write_buildid(const char *name, size_t name_len, u8 *build_id,
- pid_t pid, u16 misc, int fd)
+ pid_t pid, u16 misc, struct feat_fd *fd)
{
int err;
struct build_id_event b;
@@ -352,7 +352,8 @@ static int write_buildid(const char *name, size_t name_len, u8 *build_id,
return write_padded(fd, name, name_len + 1, len);
}
-static int machine__write_buildid_table(struct machine *machine, int fd)
+static int machine__write_buildid_table(struct machine *machine,
+ struct feat_fd *fd)
{
int err = 0;
char nm[PATH_MAX];
@@ -397,7 +398,8 @@ static int machine__write_buildid_table(struct machine *machine, int fd)
return err;
}
-int perf_session__write_buildid_table(struct perf_session *session, int fd)
+int perf_session__write_buildid_table(struct perf_session *session,
+ struct feat_fd *fd)
{
struct rb_node *nd;
int err = machine__write_buildid_table(&session->machines.host, fd);
diff --git a/tools/perf/util/build-id.h b/tools/perf/util/build-id.h
index 8a89b195c1fc..1f5121e8cc6b 100644
--- a/tools/perf/util/build-id.h
+++ b/tools/perf/util/build-id.h
@@ -9,6 +9,7 @@
extern struct perf_tool build_id__mark_dso_hit_ops;
struct dso;
+struct feat_fd;
int build_id__sprintf(const u8 *build_id, int len, char *bf);
int sysfs__sprintf_build_id(const char *root_dir, char *sbuild_id);
@@ -26,7 +27,8 @@ int build_id__mark_dso_hit(struct perf_tool *tool, union perf_event *event,
int dsos__hit_all(struct perf_session *session);
bool perf_session__read_build_ids(struct perf_session *session, bool with_hits);
-int perf_session__write_buildid_table(struct perf_session *session, int fd);
+int perf_session__write_buildid_table(struct perf_session *session,
+ struct feat_fd *fd);
int perf_session__cache_build_ids(struct perf_session *session);
char *build_id_cache__origname(const char *sbuild_id);
--git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 1c75355bf568..99451d4fd332 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -58,6 +58,11 @@ struct perf_file_attr {
struct perf_file_section ids;
};
+struct feat_fd {
+ struct perf_header *ph;
+ int fd;
+};
+
void perf_header__set_feat(struct perf_header *header, int feat)
{
set_bit(feat, header->adds_features);
@@ -74,11 +79,11 @@ bool perf_header__has_feat(const struct perf_header *header, int feat)
}
/* Return: 0 if succeded, -ERR if failed. */
-int do_write(int fd, const void *buf, size_t size)
+int do_write(struct feat_fd *ff, const void *buf, size_t size)
{
ssize_t ret;
- ret = writen(fd, buf, size);
+ ret = writen(ff->fd, buf, size);
if (ret != (ssize_t)size)
return ret < 0 ? (int)ret: -1;
@@ -86,13 +91,14 @@ int do_write(int fd, const void *buf, size_t size)
}
/* Return: 0 if succeded, -ERR if failed. */
-int write_padded(int fd, const void *bf, size_t count, size_t count_aligned)
+int write_padded(struct feat_fd *ff, const void *bf,
+ size_t count, size_t count_aligned)
{
static const char zero_buf[NAME_ALIGN];
- int err = do_write(fd, bf, count);
+ int err = do_write(ff, bf, count);
if (!err)
- err = do_write(fd, zero_buf, count_aligned - count);
+ err = do_write(ff, zero_buf, count_aligned - count);
return err;
}
@@ -101,7 +107,7 @@ int write_padded(int fd, const void *bf, size_t count, size_t count_aligned)
(PERF_ALIGN((strlen(str) + 1), NAME_ALIGN) + sizeof(u32))
/* Return: 0 if succeded, -ERR if failed. */
-static int do_write_string(int fd, const char *str)
+static int do_write_string(struct feat_fd *ff, const char *str)
{
u32 len, olen;
int ret;
@@ -110,11 +116,11 @@ static int do_write_string(int fd, const char *str)
len = PERF_ALIGN(olen, NAME_ALIGN);
/* write len, incl. \0 */
- ret = do_write(fd, &len, sizeof(len));
+ ret = do_write(ff, &len, sizeof(len));
if (ret < 0)
return ret;
- return write_padded(fd, str, olen, len);
+ return write_padded(ff, str, olen, len);
}
static int __do_read(int fd, void *addr, ssize_t size)
@@ -177,25 +183,24 @@ static char *do_read_string(int fd, struct perf_header *ph)
return NULL;
}
-static int write_tracing_data(int fd, struct perf_header *h __maybe_unused,
- struct perf_evlist *evlist)
+static int write_tracing_data(struct feat_fd *ff,
+ struct perf_evlist *evlist)
{
- return read_tracing_data(fd, &evlist->entries);
+ return read_tracing_data(ff->fd, &evlist->entries);
}
-
-static int write_build_id(int fd, struct perf_header *h,
+static int write_build_id(struct feat_fd *ff,
struct perf_evlist *evlist __maybe_unused)
{
struct perf_session *session;
int err;
- session = container_of(h, struct perf_session, header);
+ session = container_of(ff->ph, struct perf_session, header);
if (!perf_session__read_build_ids(session, true))
return -1;
- err = perf_session__write_buildid_table(session, fd);
+ err = perf_session__write_buildid_table(session, ff);
if (err < 0) {
pr_debug("failed to write buildid table\n");
return err;
@@ -205,7 +210,7 @@ static int write_build_id(int fd, struct perf_header *h,
return 0;
}
-static int write_hostname(int fd, struct perf_header *h __maybe_unused,
+static int write_hostname(struct feat_fd *ff,
struct perf_evlist *evlist __maybe_unused)
{
struct utsname uts;
@@ -215,10 +220,10 @@ static int write_hostname(int fd, struct perf_header *h __maybe_unused,
if (ret < 0)
return -1;
- return do_write_string(fd, uts.nodename);
+ return do_write_string(ff, uts.nodename);
}
-static int write_osrelease(int fd, struct perf_header *h __maybe_unused,
+static int write_osrelease(struct feat_fd *ff,
struct perf_evlist *evlist __maybe_unused)
{
struct utsname uts;
@@ -228,10 +233,10 @@ static int write_osrelease(int fd, struct perf_header *h __maybe_unused,
if (ret < 0)
return -1;
- return do_write_string(fd, uts.release);
+ return do_write_string(ff, uts.release);
}
-static int write_arch(int fd, struct perf_header *h __maybe_unused,
+static int write_arch(struct feat_fd *ff,
struct perf_evlist *evlist __maybe_unused)
{
struct utsname uts;
@@ -241,16 +246,16 @@ static int write_arch(int fd, struct perf_header *h __maybe_unused,
if (ret < 0)
return -1;
- return do_write_string(fd, uts.machine);
+ return do_write_string(ff, uts.machine);
}
-static int write_version(int fd, struct perf_header *h __maybe_unused,
+static int write_version(struct feat_fd *ff,
struct perf_evlist *evlist __maybe_unused)
{
- return do_write_string(fd, perf_version_string);
+ return do_write_string(ff, perf_version_string);
}
-static int __write_cpudesc(int fd, const char *cpuinfo_proc)
+static int __write_cpudesc(struct feat_fd *ff, const char *cpuinfo_proc)
{
FILE *file;
char *buf = NULL;
@@ -300,14 +305,14 @@ static int __write_cpudesc(int fd, const char *cpuinfo_proc)
}
p++;
}
- ret = do_write_string(fd, s);
+ ret = do_write_string(ff, s);
done:
free(buf);
fclose(file);
return ret;
}
-static int write_cpudesc(int fd, struct perf_header *h __maybe_unused,
+static int write_cpudesc(struct feat_fd *ff,
struct perf_evlist *evlist __maybe_unused)
{
#ifndef CPUINFO_PROC
@@ -318,7 +323,7 @@ static int write_cpudesc(int fd, struct perf_header *h __maybe_unused,
for (i = 0; i < ARRAY_SIZE(cpuinfo_procs); i++) {
int ret;
- ret = __write_cpudesc(fd, cpuinfo_procs[i]);
+ ret = __write_cpudesc(ff, cpuinfo_procs[i]);
if (ret >= 0)
return ret;
}
@@ -326,7 +331,7 @@ static int write_cpudesc(int fd, struct perf_header *h __maybe_unused,
}
-static int write_nrcpus(int fd, struct perf_header *h __maybe_unused,
+static int write_nrcpus(struct feat_fd *ff,
struct perf_evlist *evlist __maybe_unused)
{
long nr;
@@ -341,14 +346,14 @@ static int write_nrcpus(int fd, struct perf_header *h __maybe_unused,
nra = (u32)(nr & UINT_MAX);
- ret = do_write(fd, &nrc, sizeof(nrc));
+ ret = do_write(ff, &nrc, sizeof(nrc));
if (ret < 0)
return ret;
- return do_write(fd, &nra, sizeof(nra));
+ return do_write(ff, &nra, sizeof(nra));
}
-static int write_event_desc(int fd, struct perf_header *h __maybe_unused,
+static int write_event_desc(struct feat_fd *ff,
struct perf_evlist *evlist)
{
struct perf_evsel *evsel;
@@ -360,7 +365,7 @@ static int write_event_desc(int fd, struct perf_header *h __maybe_unused,
/*
* write number of events
*/
- ret = do_write(fd, &nre, sizeof(nre));
+ ret = do_write(ff, &nre, sizeof(nre));
if (ret < 0)
return ret;
@@ -368,12 +373,12 @@ static int write_event_desc(int fd, struct perf_header *h __maybe_unused,
* size of perf_event_attr struct
*/
sz = (u32)sizeof(evsel->attr);
- ret = do_write(fd, &sz, sizeof(sz));
+ ret = do_write(ff, &sz, sizeof(sz));
if (ret < 0)
return ret;
evlist__for_each_entry(evlist, evsel) {
- ret = do_write(fd, &evsel->attr, sz);
+ ret = do_write(ff, &evsel->attr, sz);
if (ret < 0)
return ret;
/*
@@ -384,27 +389,27 @@ static int write_event_desc(int fd, struct perf_header *h __maybe_unused,
* type of ids,
*/
nri = evsel->ids;
- ret = do_write(fd, &nri, sizeof(nri));
+ ret = do_write(ff, &nri, sizeof(nri));
if (ret < 0)
return ret;
/*
* write event string as passed on cmdline
*/
- ret = do_write_string(fd, perf_evsel__name(evsel));
+ ret = do_write_string(ff, perf_evsel__name(evsel));
if (ret < 0)
return ret;
/*
* write unique ids for this event
*/
- ret = do_write(fd, evsel->id, evsel->ids * sizeof(u64));
+ ret = do_write(ff, evsel->id, evsel->ids * sizeof(u64));
if (ret < 0)
return ret;
}
return 0;
}
-static int write_cmdline(int fd, struct perf_header *h __maybe_unused,
+static int write_cmdline(struct feat_fd *ff,
struct perf_evlist *evlist __maybe_unused)
{
char buf[MAXPATHLEN];
@@ -422,16 +427,16 @@ static int write_cmdline(int fd, struct perf_header *h __maybe_unused,
/* account for binary path */
n = perf_env.nr_cmdline + 1;
- ret = do_write(fd, &n, sizeof(n));
+ ret = do_write(ff, &n, sizeof(n));
if (ret < 0)
return ret;
- ret = do_write_string(fd, buf);
+ ret = do_write_string(ff, buf);
if (ret < 0)
return ret;
for (i = 0 ; i < perf_env.nr_cmdline; i++) {
- ret = do_write_string(fd, perf_env.cmdline_argv[i]);
+ ret = do_write_string(ff, perf_env.cmdline_argv[i]);
if (ret < 0)
return ret;
}
@@ -584,8 +589,8 @@ static struct cpu_topo *build_cpu_topology(void)
return tp;
}
-static int write_cpu_topology(int fd, struct perf_header *h __maybe_unused,
- struct perf_evlist *evlist __maybe_unused)
+static int write_cpu_topology(struct feat_fd *ff,
+ struct perf_evlist *evlist __maybe_unused)
{
struct cpu_topo *tp;
u32 i;
@@ -595,21 +600,21 @@ static int write_cpu_topology(int fd, struct perf_header *h __maybe_unused,
if (!tp)
return -1;
- ret = do_write(fd, &tp->core_sib, sizeof(tp->core_sib));
+ ret = do_write(ff, &tp->core_sib, sizeof(tp->core_sib));
if (ret < 0)
goto done;
for (i = 0; i < tp->core_sib; i++) {
- ret = do_write_string(fd, tp->core_siblings[i]);
+ ret = do_write_string(ff, tp->core_siblings[i]);
if (ret < 0)
goto done;
}
- ret = do_write(fd, &tp->thread_sib, sizeof(tp->thread_sib));
+ ret = do_write(ff, &tp->thread_sib, sizeof(tp->thread_sib));
if (ret < 0)
goto done;
for (i = 0; i < tp->thread_sib; i++) {
- ret = do_write_string(fd, tp->thread_siblings[i]);
+ ret = do_write_string(ff, tp->thread_siblings[i]);
if (ret < 0)
break;
}
@@ -619,11 +624,11 @@ static int write_cpu_topology(int fd, struct perf_header *h __maybe_unused,
goto done;
for (j = 0; j < perf_env.nr_cpus_avail; j++) {
- ret = do_write(fd, &perf_env.cpu[j].core_id,
+ ret = do_write(ff, &perf_env.cpu[j].core_id,
sizeof(perf_env.cpu[j].core_id));
if (ret < 0)
return ret;
- ret = do_write(fd, &perf_env.cpu[j].socket_id,
+ ret = do_write(ff, &perf_env.cpu[j].socket_id,
sizeof(perf_env.cpu[j].socket_id));
if (ret < 0)
return ret;
@@ -635,8 +640,8 @@ static int write_cpu_topology(int fd, struct perf_header *h __maybe_unused,
-static int write_total_mem(int fd, struct perf_header *h __maybe_unused,
- struct perf_evlist *evlist __maybe_unused)
+static int write_total_mem(struct feat_fd *ff,
+ struct perf_evlist *evlist __maybe_unused)
{
char *buf = NULL;
FILE *fp;
@@ -656,7 +661,7 @@ static int write_total_mem(int fd, struct perf_header *h __maybe_unused,
if (!ret) {
n = sscanf(buf, "%*s %"PRIu64, &mem);
if (n == 1)
- ret = do_write(fd, &mem, sizeof(mem));
+ ret = do_write(ff, &mem, sizeof(mem));
} else
ret = -1;
free(buf);
@@ -664,7 +669,7 @@ static int write_total_mem(int fd, struct perf_header *h __maybe_unused,
return ret;
}
-static int write_topo_node(int fd, int node)
+static int write_topo_node(struct feat_fd *ff, int node)
{
char str[MAXPATHLEN];
char field[32];
@@ -694,11 +699,11 @@ static int write_topo_node(int fd, int node)
fclose(fp);
fp = NULL;
- ret = do_write(fd, &mem_total, sizeof(u64));
+ ret = do_write(ff, &mem_total, sizeof(u64));
if (ret)
goto done;
- ret = do_write(fd, &mem_free, sizeof(u64));
+ ret = do_write(ff, &mem_free, sizeof(u64));
if (ret)
goto done;
@@ -716,7 +721,7 @@ static int write_topo_node(int fd, int node)
if (p)
*p = '\0';
- ret = do_write_string(fd, buf);
+ ret = do_write_string(ff, buf);
done:
free(buf);
if (fp)
@@ -724,8 +729,8 @@ static int write_topo_node(int fd, int node)
return ret;
}
-static int write_numa_topology(int fd, struct perf_header *h __maybe_unused,
- struct perf_evlist *evlist __maybe_unused)
+static int write_numa_topology(struct feat_fd *ff,
+ struct perf_evlist *evlist __maybe_unused)
{
char *buf = NULL;
size_t len = 0;
@@ -752,17 +757,17 @@ static int write_numa_topology(int fd, struct perf_header *h __maybe_unused,
nr = (u32)node_map->nr;
- ret = do_write(fd, &nr, sizeof(nr));
+ ret = do_write(ff, &nr, sizeof(nr));
if (ret < 0)
goto done;
for (i = 0; i < nr; i++) {
j = (u32)node_map->map[i];
- ret = do_write(fd, &j, sizeof(j));
+ ret = do_write(ff, &j, sizeof(j));
if (ret < 0)
break;
- ret = write_topo_node(fd, i);
+ ret = write_topo_node(ff, i);
if (ret < 0)
break;
}
@@ -785,16 +790,16 @@ static int write_numa_topology(int fd, struct perf_header *h __maybe_unused,
* };
*/
-static int write_pmu_mappings(int fd, struct perf_header *h __maybe_unused,
+static int write_pmu_mappings(struct feat_fd *ff,
struct perf_evlist *evlist __maybe_unused)
{
struct perf_pmu *pmu = NULL;
- off_t offset = lseek(fd, 0, SEEK_CUR);
+ off_t offset = lseek(ff->fd, 0, SEEK_CUR);
__u32 pmu_num = 0;
int ret;
/* write real pmu_num later */
- ret = do_write(fd, &pmu_num, sizeof(pmu_num));
+ ret = do_write(ff, &pmu_num, sizeof(pmu_num));
if (ret < 0)
return ret;
@@ -803,18 +808,18 @@ static int write_pmu_mappings(int fd, struct perf_header *h __maybe_unused,
continue;
pmu_num++;
- ret = do_write(fd, &pmu->type, sizeof(pmu->type));
+ ret = do_write(ff, &pmu->type, sizeof(pmu->type));
if (ret < 0)
return ret;
- ret = do_write_string(fd, pmu->name);
+ ret = do_write_string(ff, pmu->name);
if (ret < 0)
return ret;
}
- if (pwrite(fd, &pmu_num, sizeof(pmu_num), offset) != sizeof(pmu_num)) {
+ if (pwrite(ff->fd, &pmu_num, sizeof(pmu_num), offset) != sizeof(pmu_num)) {
/* discard all */
- lseek(fd, offset, SEEK_SET);
+ lseek(ff->fd, offset, SEEK_SET);
return -1;
}
@@ -833,14 +838,14 @@ static int write_pmu_mappings(int fd, struct perf_header *h __maybe_unused,
* }[nr_groups];
* };
*/
-static int write_group_desc(int fd, struct perf_header *h __maybe_unused,
+static int write_group_desc(struct feat_fd *ff,
struct perf_evlist *evlist)
{
u32 nr_groups = evlist->nr_groups;
struct perf_evsel *evsel;
int ret;
- ret = do_write(fd, &nr_groups, sizeof(nr_groups));
+ ret = do_write(ff, &nr_groups, sizeof(nr_groups));
if (ret < 0)
return ret;
@@ -851,15 +856,15 @@ static int write_group_desc(int fd, struct perf_header *h __maybe_unused,
u32 leader_idx = evsel->idx;
u32 nr_members = evsel->nr_members;
- ret = do_write_string(fd, name);
+ ret = do_write_string(ff, name);
if (ret < 0)
return ret;
- ret = do_write(fd, &leader_idx, sizeof(leader_idx));
+ ret = do_write(ff, &leader_idx, sizeof(leader_idx));
if (ret < 0)
return ret;
- ret = do_write(fd, &nr_members, sizeof(nr_members));
+ ret = do_write(ff, &nr_members, sizeof(nr_members));
if (ret < 0)
return ret;
}
@@ -876,7 +881,7 @@ int __weak get_cpuid(char *buffer __maybe_unused, size_t sz __maybe_unused)
return -1;
}
-static int write_cpuid(int fd, struct perf_header *h __maybe_unused,
+static int write_cpuid(struct feat_fd *ff,
struct perf_evlist *evlist __maybe_unused)
{
char buffer[64];
@@ -888,25 +893,24 @@ static int write_cpuid(int fd, struct perf_header *h __maybe_unused,
return -1;
write_it:
- return do_write_string(fd, buffer);
+ return do_write_string(ff, buffer);
}
-static int write_branch_stack(int fd __maybe_unused,
- struct perf_header *h __maybe_unused,
- struct perf_evlist *evlist __maybe_unused)
+static int write_branch_stack(struct feat_fd *ff __maybe_unused,
+ struct perf_evlist *evlist __maybe_unused)
{
return 0;
}
-static int write_auxtrace(int fd, struct perf_header *h,
+static int write_auxtrace(struct feat_fd *ff,
struct perf_evlist *evlist __maybe_unused)
{
struct perf_session *session;
int err;
- session = container_of(h, struct perf_session, header);
+ session = container_of(ff->ph, struct perf_session, header);
- err = auxtrace_index__write(fd, &session->auxtrace_index);
+ err = auxtrace_index__write(ff->fd, &session->auxtrace_index);
if (err < 0)
pr_err("Failed to write auxtrace index\n");
return err;
@@ -1053,8 +1057,8 @@ static int build_caches(struct cpu_cache_level caches[], u32 size, u32 *cntp)
#define MAX_CACHES 2000
-static int write_cache(int fd, struct perf_header *h __maybe_unused,
- struct perf_evlist *evlist __maybe_unused)
+static int write_cache(struct feat_fd *ff,
+ struct perf_evlist *evlist __maybe_unused)
{
struct cpu_cache_level caches[MAX_CACHES];
u32 cnt = 0, i, version = 1;
@@ -1066,11 +1070,11 @@ static int write_cache(int fd, struct perf_header *h __maybe_unused,
qsort(&caches, cnt, sizeof(struct cpu_cache_level), cpu_cache_level__sort);
- ret = do_write(fd, &version, sizeof(u32));
+ ret = do_write(ff, &version, sizeof(u32));
if (ret < 0)
goto out;
- ret = do_write(fd, &cnt, sizeof(u32));
+ ret = do_write(ff, &cnt, sizeof(u32));
if (ret < 0)
goto out;
@@ -1078,7 +1082,7 @@ static int write_cache(int fd, struct perf_header *h __maybe_unused,
struct cpu_cache_level *c = &caches[i];
#define _W(v) \
- ret = do_write(fd, &c->v, sizeof(u32)); \
+ ret = do_write(ff, &c->v, sizeof(u32)); \
if (ret < 0) \
goto out;
@@ -1089,7 +1093,7 @@ static int write_cache(int fd, struct perf_header *h __maybe_unused,
#undef _W
#define _W(v) \
- ret = do_write_string(fd, (const char *) c->v); \
+ ret = do_write_string(ff, (const char *) c->v); \
if (ret < 0) \
goto out;
@@ -1105,8 +1109,7 @@ static int write_cache(int fd, struct perf_header *h __maybe_unused,
return ret;
}
-static int write_stat(int fd __maybe_unused,
- struct perf_header *h __maybe_unused,
+static int write_stat(struct feat_fd *ff __maybe_unused,
struct perf_evlist *evlist __maybe_unused)
{
return 0;
@@ -2096,7 +2099,7 @@ static int process_cache(struct perf_file_section *section __maybe_unused,
}
struct feature_ops {
- int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist);
+ int (*write)(struct feat_fd *ff, struct perf_evlist *evlist);
void (*print)(struct perf_header *h, int fd, FILE *fp);
int (*process)(struct perf_file_section *section,
struct perf_header *h, int fd, void *data);
@@ -2205,29 +2208,29 @@ int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full)
return 0;
}
-static int do_write_feat(int fd, struct perf_header *h, int type,
+static int do_write_feat(struct feat_fd *ff, int type,
struct perf_file_section **p,
struct perf_evlist *evlist)
{
int err;
int ret = 0;
- if (perf_header__has_feat(h, type)) {
+ if (perf_header__has_feat(ff->ph, type)) {
if (!feat_ops[type].write)
return -1;
- (*p)->offset = lseek(fd, 0, SEEK_CUR);
+ (*p)->offset = lseek(ff->fd, 0, SEEK_CUR);
- err = feat_ops[type].write(fd, h, evlist);
+ err = feat_ops[type].write(ff, evlist);
if (err < 0) {
pr_debug("failed to write feature %s\n", feat_ops[type].name);
/* undo anything written */
- lseek(fd, (*p)->offset, SEEK_SET);
+ lseek(ff->fd, (*p)->offset, SEEK_SET);
return -1;
}
- (*p)->size = lseek(fd, 0, SEEK_CUR) - (*p)->offset;
+ (*p)->size = lseek(ff->fd, 0, SEEK_CUR) - (*p)->offset;
(*p)++;
}
return ret;
@@ -2237,12 +2240,18 @@ static int perf_header__adds_write(struct perf_header *header,
struct perf_evlist *evlist, int fd)
{
int nr_sections;
+ struct feat_fd ff;
struct perf_file_section *feat_sec, *p;
int sec_size;
u64 sec_start;
int feat;
int err;
+ ff = (struct feat_fd){
+ .fd = fd,
+ .ph = header,
+ };
+
nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
if (!nr_sections)
return 0;
@@ -2257,7 +2266,7 @@ static int perf_header__adds_write(struct perf_header *header,
lseek(fd, sec_start + sec_size, SEEK_SET);
for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
- if (do_write_feat(fd, header, feat, &p, evlist))
+ if (do_write_feat(&ff, feat, &p, evlist))
perf_header__clear_feat(header, feat);
}
@@ -2266,7 +2275,7 @@ static int perf_header__adds_write(struct perf_header *header,
* may write more than needed due to dropped feature, but
* this is okay, reader will skip the mising entries
*/
- err = do_write(fd, feat_sec, sec_size);
+ err = do_write(&ff, feat_sec, sec_size);
if (err < 0)
pr_debug("failed to write feature section\n");
free(feat_sec);
@@ -2276,14 +2285,17 @@ static int perf_header__adds_write(struct perf_header *header,
int perf_header__write_pipe(int fd)
{
struct perf_pipe_file_header f_header;
+ struct feat_fd ff;
int err;
+ ff = (struct feat_fd){ .fd = fd };
+
f_header = (struct perf_pipe_file_header){
.magic = PERF_MAGIC,
.size = sizeof(f_header),
};
- err = do_write(fd, &f_header, sizeof(f_header));
+ err = do_write(&ff, &f_header, sizeof(f_header));
if (err < 0) {
pr_debug("failed to write perf pipe header\n");
return err;
@@ -2300,21 +2312,23 @@ int perf_session__write_header(struct perf_session *session,
struct perf_file_attr f_attr;
struct perf_header *header = &session->header;
struct perf_evsel *evsel;
+ struct feat_fd ff;
u64 attr_offset;
int err;
+ ff = (struct feat_fd){ .fd = fd};
lseek(fd, sizeof(f_header), SEEK_SET);
evlist__for_each_entry(session->evlist, evsel) {
evsel->id_offset = lseek(fd, 0, SEEK_CUR);
- err = do_write(fd, evsel->id, evsel->ids * sizeof(u64));
+ err = do_write(&ff, evsel->id, evsel->ids * sizeof(u64));
if (err < 0) {
pr_debug("failed to write perf header\n");
return err;
}
}
- attr_offset = lseek(fd, 0, SEEK_CUR);
+ attr_offset = lseek(ff.fd, 0, SEEK_CUR);
evlist__for_each_entry(evlist, evsel) {
f_attr = (struct perf_file_attr){
@@ -2324,7 +2338,7 @@ int perf_session__write_header(struct perf_session *session,
.size = evsel->ids * sizeof(u64),
}
};
- err = do_write(fd, &f_attr, sizeof(f_attr));
+ err = do_write(&ff, &f_attr, sizeof(f_attr));
if (err < 0) {
pr_debug("failed to write perf header attribute\n");
return err;
@@ -2359,7 +2373,7 @@ int perf_session__write_header(struct perf_session *session,
memcpy(&f_header.adds_features, &header->adds_features, sizeof(header->adds_features));
lseek(fd, 0, SEEK_SET);
- err = do_write(fd, &f_header, sizeof(f_header));
+ err = do_write(&ff, &f_header, sizeof(f_header));
if (err < 0) {
pr_debug("failed to write perf header\n");
return err;
@@ -2634,6 +2648,10 @@ static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
struct perf_header *ph, int fd,
bool repipe)
{
+ struct feat_fd ff = {
+ .fd = STDOUT_FILENO,
+ .ph = ph,
+ };
ssize_t ret;
ret = readn(fd, header, sizeof(*header));
@@ -2648,7 +2666,7 @@ static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
if (ph->needs_swap)
header->size = bswap_64(header->size);
- if (repipe && do_write(STDOUT_FILENO, header, sizeof(*header)) < 0)
+ if (repipe && do_write(&ff, header, sizeof(*header)) < 0)
return -1;
return 0;
@@ -3156,6 +3174,7 @@ int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd,
union perf_event ev;
struct tracing_data *tdata;
ssize_t size = 0, aligned_size = 0, padding;
+ struct feat_fd ff;
int err __maybe_unused = 0;
/*
@@ -3190,7 +3209,8 @@ int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd,
*/
tracing_data_put(tdata);
- if (write_padded(fd, NULL, 0, padding))
+ ff = (struct feat_fd){ .fd = fd };
+ if (write_padded(&ff, NULL, 0, padding))
return -1;
return aligned_size;
--git a/tools/perf/util/header.h b/tools/perf/util/header.h
index e98489c8bba7..9d8dcd5eb727 100644
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -144,9 +144,12 @@ bool is_perf_magic(u64 magic);
#define NAME_ALIGN 64
-int do_write(int fd, const void *buf, size_t size);
+struct feat_fd;
-int write_padded(int fd, const void *bf, size_t count, size_t count_aligned);
+int do_write(struct feat_fd *fd, const void *buf, size_t size);
+
+int write_padded(struct feat_fd *fd, const void *bf,
+ size_t count, size_t count_aligned);
/*
* arch specific callback
--
2.13.1.508.gb3defc5cc-goog
^ permalink raw reply related [flat|nested] 27+ messages in thread* [PATCH v3 07/15] perf header: use struct feat_fd for print
2017-06-06 7:07 [PATCH v3 00/15] perf tool: add meta-data header support for pipe-mode David Carrillo-Cisneros
` (5 preceding siblings ...)
2017-06-06 7:07 ` [PATCH v3 06/15] perf header: add struct feat_fd for write David Carrillo-Cisneros
@ 2017-06-06 7:07 ` David Carrillo-Cisneros
2017-06-06 7:07 ` [PATCH v3 08/15] perf header: use struct feat_fd to process header records David Carrillo-Cisneros
` (8 subsequent siblings)
15 siblings, 0 replies; 27+ messages in thread
From: David Carrillo-Cisneros @ 2017-06-06 7:07 UTC (permalink / raw)
To: linux-kernel
Cc: Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo,
Alexander Shishkin, Andi Kleen, Simon Que, Wang Nan, Jiri Olsa,
He Kuang, Masami Hiramatsu, Stephane Eranian, Paul Turner,
David Carrillo-Cisneros
As preparation for using header records in pipe mode, replace
int fd with struct feat_fd ff in print functions for all header
record types.
Signed-off-by: David Carrillo-Cisneros <davidcc@google.com>
---
| 102 ++++++++++++++++++++++-------------------------
1 file changed, 47 insertions(+), 55 deletions(-)
--git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 99451d4fd332..7fd4ea15052e 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1115,62 +1115,56 @@ static int write_stat(struct feat_fd *ff __maybe_unused,
return 0;
}
-static void print_hostname(struct perf_header *ph, int fd __maybe_unused,
- FILE *fp)
+static void print_hostname(struct feat_fd *ff, FILE *fp)
{
- fprintf(fp, "# hostname : %s\n", ph->env.hostname);
+ fprintf(fp, "# hostname : %s\n", ff->ph->env.hostname);
}
-static void print_osrelease(struct perf_header *ph, int fd __maybe_unused,
- FILE *fp)
+static void print_osrelease(struct feat_fd *ff, FILE *fp)
{
- fprintf(fp, "# os release : %s\n", ph->env.os_release);
+ fprintf(fp, "# os release : %s\n", ff->ph->env.os_release);
}
-static void print_arch(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
+static void print_arch(struct feat_fd *ff, FILE *fp)
{
- fprintf(fp, "# arch : %s\n", ph->env.arch);
+ fprintf(fp, "# arch : %s\n", ff->ph->env.arch);
}
-static void print_cpudesc(struct perf_header *ph, int fd __maybe_unused,
- FILE *fp)
+static void print_cpudesc(struct feat_fd *ff, FILE *fp)
{
- fprintf(fp, "# cpudesc : %s\n", ph->env.cpu_desc);
+ fprintf(fp, "# cpudesc : %s\n", ff->ph->env.cpu_desc);
}
-static void print_nrcpus(struct perf_header *ph, int fd __maybe_unused,
- FILE *fp)
+static void print_nrcpus(struct feat_fd *ff, FILE *fp)
{
- fprintf(fp, "# nrcpus online : %u\n", ph->env.nr_cpus_online);
- fprintf(fp, "# nrcpus avail : %u\n", ph->env.nr_cpus_avail);
+ fprintf(fp, "# nrcpus online : %u\n", ff->ph->env.nr_cpus_online);
+ fprintf(fp, "# nrcpus avail : %u\n", ff->ph->env.nr_cpus_avail);
}
-static void print_version(struct perf_header *ph, int fd __maybe_unused,
- FILE *fp)
+static void print_version(struct feat_fd *ff, FILE *fp)
{
- fprintf(fp, "# perf version : %s\n", ph->env.version);
+ fprintf(fp, "# perf version : %s\n", ff->ph->env.version);
}
-static void print_cmdline(struct perf_header *ph, int fd __maybe_unused,
- FILE *fp)
+static void print_cmdline(struct feat_fd *ff, FILE *fp)
{
int nr, i;
- nr = ph->env.nr_cmdline;
+ nr = ff->ph->env.nr_cmdline;
fprintf(fp, "# cmdline : ");
for (i = 0; i < nr; i++)
- fprintf(fp, "%s ", ph->env.cmdline_argv[i]);
+ fprintf(fp, "%s ", ff->ph->env.cmdline_argv[i]);
fputc('\n', fp);
}
-static void print_cpu_topology(struct perf_header *ph, int fd __maybe_unused,
- FILE *fp)
+static void print_cpu_topology(struct feat_fd *ff, FILE *fp)
{
+ struct perf_header *ph = ff->ph;
+ int cpu_nr = ph->env.nr_cpus_avail;
int nr, i;
char *str;
- int cpu_nr = ph->env.nr_cpus_avail;
nr = ph->env.nr_sibling_cores;
str = ph->env.sibling_cores;
@@ -1296,9 +1290,9 @@ static int __desc_attr__fprintf(FILE *fp, const char *name, const char *val,
return fprintf(fp, ", %s = %s", name, val);
}
-static void print_event_desc(struct perf_header *ph, int fd, FILE *fp)
+static void print_event_desc(struct feat_fd *ff, FILE *fp)
{
- struct perf_evsel *evsel, *events = read_event_desc(ph, fd);
+ struct perf_evsel *evsel, *events = read_event_desc(ff->ph, ff->fd);
u32 j;
u64 *id;
@@ -1328,20 +1322,18 @@ static void print_event_desc(struct perf_header *ph, int fd, FILE *fp)
free_event_desc(events);
}
-static void print_total_mem(struct perf_header *ph, int fd __maybe_unused,
- FILE *fp)
+static void print_total_mem(struct feat_fd *ff, FILE *fp)
{
- fprintf(fp, "# total memory : %Lu kB\n", ph->env.total_mem);
+ fprintf(fp, "# total memory : %llu kB\n", ff->ph->env.total_mem);
}
-static void print_numa_topology(struct perf_header *ph, int fd __maybe_unused,
- FILE *fp)
+static void print_numa_topology(struct feat_fd *ff, FILE *fp)
{
int i;
struct numa_node *n;
- for (i = 0; i < ph->env.nr_numa_nodes; i++) {
- n = &ph->env.numa_nodes[i];
+ for (i = 0; i < ff->ph->env.nr_numa_nodes; i++) {
+ n = &ff->ph->env.numa_nodes[i];
fprintf(fp, "# node%u meminfo : total = %"PRIu64" kB,"
" free = %"PRIu64" kB\n",
@@ -1352,56 +1344,51 @@ static void print_numa_topology(struct perf_header *ph, int fd __maybe_unused,
}
}
-static void print_cpuid(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
+static void print_cpuid(struct feat_fd *ff, FILE *fp)
{
- fprintf(fp, "# cpuid : %s\n", ph->env.cpuid);
+ fprintf(fp, "# cpuid : %s\n", ff->ph->env.cpuid);
}
-static void print_branch_stack(struct perf_header *ph __maybe_unused,
- int fd __maybe_unused, FILE *fp)
+static void print_branch_stack(struct feat_fd *ff __maybe_unused, FILE *fp)
{
fprintf(fp, "# contains samples with branch stack\n");
}
-static void print_auxtrace(struct perf_header *ph __maybe_unused,
- int fd __maybe_unused, FILE *fp)
+static void print_auxtrace(struct feat_fd *ff __maybe_unused, FILE *fp)
{
fprintf(fp, "# contains AUX area data (e.g. instruction trace)\n");
}
-static void print_stat(struct perf_header *ph __maybe_unused,
- int fd __maybe_unused, FILE *fp)
+static void print_stat(struct feat_fd *ff __maybe_unused, FILE *fp)
{
fprintf(fp, "# contains stat data\n");
}
-static void print_cache(struct perf_header *ph __maybe_unused,
- int fd __maybe_unused, FILE *fp __maybe_unused)
+static void print_cache(struct feat_fd *ff, FILE *fp __maybe_unused)
{
int i;
fprintf(fp, "# CPU cache info:\n");
- for (i = 0; i < ph->env.caches_cnt; i++) {
+ for (i = 0; i < ff->ph->env.caches_cnt; i++) {
fprintf(fp, "# ");
- cpu_cache_level__fprintf(fp, &ph->env.caches[i]);
+ cpu_cache_level__fprintf(fp, &ff->ph->env.caches[i]);
}
}
-static void print_pmu_mappings(struct perf_header *ph, int fd __maybe_unused,
- FILE *fp)
+static void print_pmu_mappings(struct feat_fd *ff, FILE *fp)
{
const char *delimiter = "# pmu mappings: ";
char *str, *tmp;
u32 pmu_num;
u32 type;
- pmu_num = ph->env.nr_pmu_mappings;
+ pmu_num = ff->ph->env.nr_pmu_mappings;
if (!pmu_num) {
fprintf(fp, "# pmu mappings: not available\n");
return;
}
- str = ph->env.pmu_mappings;
+ str = ff->ph->env.pmu_mappings;
while (pmu_num) {
type = strtoul(str, &tmp, 0);
@@ -1424,14 +1411,13 @@ static void print_pmu_mappings(struct perf_header *ph, int fd __maybe_unused,
fprintf(fp, "# pmu mappings: unable to read\n");
}
-static void print_group_desc(struct perf_header *ph, int fd __maybe_unused,
- FILE *fp)
+static void print_group_desc(struct feat_fd *ff, FILE *fp)
{
struct perf_session *session;
struct perf_evsel *evsel;
u32 nr = 0;
- session = container_of(ph, struct perf_session, header);
+ session = container_of(ff->ph, struct perf_session, header);
evlist__for_each_entry(session->evlist, evsel) {
if (perf_evsel__is_group_leader(evsel) &&
@@ -2100,7 +2086,7 @@ static int process_cache(struct perf_file_section *section __maybe_unused,
struct feature_ops {
int (*write)(struct feat_fd *ff, struct perf_evlist *evlist);
- void (*print)(struct perf_header *h, int fd, FILE *fp);
+ void (*print)(struct feat_fd *ff, FILE *fp);
int (*process)(struct perf_file_section *section,
struct perf_header *h, int fd, void *data);
const char *name;
@@ -2153,6 +2139,7 @@ static int perf_file_section__fprintf_info(struct perf_file_section *section,
int feat, int fd, void *data)
{
struct header_print_data *hd = data;
+ struct feat_fd ff;
if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
@@ -2166,8 +2153,13 @@ static int perf_file_section__fprintf_info(struct perf_file_section *section,
if (!feat_ops[feat].print)
return 0;
+ ff = (struct feat_fd) {
+ .fd = fd,
+ .ph = ph,
+ };
+
if (!feat_ops[feat].full_only || hd->full)
- feat_ops[feat].print(ph, fd, hd->fp);
+ feat_ops[feat].print(&ff, hd->fp);
else
fprintf(hd->fp, "# %s info available, use -I to display\n",
feat_ops[feat].name);
--
2.13.1.508.gb3defc5cc-goog
^ permalink raw reply related [flat|nested] 27+ messages in thread* [PATCH v3 08/15] perf header: use struct feat_fd to process header records
2017-06-06 7:07 [PATCH v3 00/15] perf tool: add meta-data header support for pipe-mode David Carrillo-Cisneros
` (6 preceding siblings ...)
2017-06-06 7:07 ` [PATCH v3 07/15] perf header: use struct feat_fd for print David Carrillo-Cisneros
@ 2017-06-06 7:07 ` David Carrillo-Cisneros
2017-06-08 11:54 ` Jiri Olsa
2017-06-06 7:07 ` [PATCH v3 09/15] perf header: use struct feat_fd in read " David Carrillo-Cisneros
` (7 subsequent siblings)
15 siblings, 1 reply; 27+ messages in thread
From: David Carrillo-Cisneros @ 2017-06-06 7:07 UTC (permalink / raw)
To: linux-kernel
Cc: Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo,
Alexander Shishkin, Andi Kleen, Simon Que, Wang Nan, Jiri Olsa,
He Kuang, Masami Hiramatsu, Stephane Eranian, Paul Turner,
David Carrillo-Cisneros
As preparation for using header records in pipe-mode, replace
int fd with struct feat_fd ff in process functions for all header
record types.
To replace the argument struct perf-file_section *section in the
process_* functions for feature headers, add offset and size variables
to struct feat_fd.
This patch does not change behavior.
Signed-off-by: David Carrillo-Cisneros <davidcc@google.com>
---
| 170 ++++++++++++++++++++++-------------------------
1 file changed, 79 insertions(+), 91 deletions(-)
--git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 7fd4ea15052e..3f22258a633f 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -61,6 +61,8 @@ struct perf_file_attr {
struct feat_fd {
struct perf_header *ph;
int fd;
+ ssize_t offset;
+ size_t size;
};
void perf_header__set_feat(struct perf_header *header, int feat)
@@ -1584,12 +1586,10 @@ static int perf_header__read_build_ids(struct perf_header *header,
/* Macro for features that simply need to read and store a string. */
#define FEAT_PROCESS_STR_FUN(__feat, __feat_env) \
-static int process_##__feat(struct perf_file_section *section __maybe_unused, \
- struct perf_header *ph, int fd, \
- void *data __maybe_unused) \
+static int process_##__feat(struct feat_fd *ff, void *data __maybe_unused) \
{\
- ph->env.__feat_env = do_read_string(fd, ph); \
- return ph->env.__feat_env ? 0 : -ENOMEM; \
+ ff->ph->env.__feat_env = do_read_string(ff->fd, ff->ph); \
+ return ff->ph->env.__feat_env ? 0 : -ENOMEM; \
}
FEAT_PROCESS_STR_FUN(hostname, hostname);
@@ -1599,53 +1599,46 @@ FEAT_PROCESS_STR_FUN(arch, arch);
FEAT_PROCESS_STR_FUN(cpudesc, cpu_desc);
FEAT_PROCESS_STR_FUN(cpuid, cpuid);
-static int process_tracing_data(struct perf_file_section *section __maybe_unused,
- struct perf_header *ph __maybe_unused,
- int fd, void *data)
+static int process_tracing_data(struct feat_fd *ff, void *data)
{
- ssize_t ret = trace_report(fd, data, false);
+ ssize_t ret = trace_report(ff->fd, data, false);
+
return ret < 0 ? -1 : 0;
}
-static int process_build_id(struct perf_file_section *section,
- struct perf_header *ph, int fd,
- void *data __maybe_unused)
+static int process_build_id(struct feat_fd *ff, void *data __maybe_unused)
{
- if (perf_header__read_build_ids(ph, fd, section->offset, section->size))
+ if (perf_header__read_build_ids(ff->ph, ff->fd, ff->offset, ff->size))
pr_debug("Failed to read buildids, continuing...\n");
return 0;
}
-static int process_nrcpus(struct perf_file_section *section __maybe_unused,
- struct perf_header *ph, int fd,
- void *data __maybe_unused)
+static int process_nrcpus(struct feat_fd *ff, void *data __maybe_unused)
{
int ret;
u32 nr_cpus_avail, nr_cpus_online;
- ret = do_read_u32(fd, ph, &nr_cpus_avail);
+ ret = do_read_u32(ff->fd, ff->ph, &nr_cpus_avail);
if (ret)
return ret;
- ret = do_read_u32(fd, ph, &nr_cpus_online);
+ ret = do_read_u32(ff->fd, ff->ph, &nr_cpus_online);
if (ret)
return ret;
- ph->env.nr_cpus_avail = (int)nr_cpus_avail;
- ph->env.nr_cpus_online = (int)nr_cpus_online;
+ ff->ph->env.nr_cpus_avail = (int)nr_cpus_avail;
+ ff->ph->env.nr_cpus_online = (int)nr_cpus_online;
return 0;
}
-static int process_total_mem(struct perf_file_section *section __maybe_unused,
- struct perf_header *ph, int fd,
- void *data __maybe_unused)
+static int process_total_mem(struct feat_fd *ff, void *data __maybe_unused)
{
u64 total_mem;
int ret;
- ret = do_read_u64(fd, ph, &total_mem);
+ ret = do_read_u64(ff->fd, ff->ph, &total_mem);
if (ret)
return -1;
- ph->env.total_mem = (unsigned long long)total_mem;
+ ff->ph->env.total_mem = (unsigned long long)total_mem;
return 0;
}
@@ -1682,17 +1675,15 @@ perf_evlist__set_event_name(struct perf_evlist *evlist,
}
static int
-process_event_desc(struct perf_file_section *section __maybe_unused,
- struct perf_header *header, int fd,
- void *data __maybe_unused)
+process_event_desc(struct feat_fd *ff, void *data __maybe_unused)
{
struct perf_session *session;
- struct perf_evsel *evsel, *events = read_event_desc(header, fd);
+ struct perf_evsel *evsel, *events = read_event_desc(ff->ph, ff->fd);
if (!events)
return 0;
- session = container_of(header, struct perf_session, header);
+ session = container_of(ff->ph, struct perf_session, header);
for (evsel = events; evsel->attr.size; evsel++)
perf_evlist__set_event_name(session->evlist, evsel);
@@ -1701,19 +1692,17 @@ process_event_desc(struct perf_file_section *section __maybe_unused,
return 0;
}
-static int process_cmdline(struct perf_file_section *section,
- struct perf_header *ph, int fd,
- void *data __maybe_unused)
+static int process_cmdline(struct feat_fd *ff, void *data __maybe_unused)
{
char *str, *cmdline = NULL, **argv = NULL;
u32 nr, i, len = 0;
- if (do_read_u32(fd, ph, &nr))
+ if (do_read_u32(ff->fd, ff->ph, &nr))
return -1;
- ph->env.nr_cmdline = nr;
+ ff->ph->env.nr_cmdline = nr;
- cmdline = zalloc(section->size + nr + 1);
+ cmdline = zalloc(ff->size + nr + 1);
if (!cmdline)
return -1;
@@ -1722,7 +1711,7 @@ static int process_cmdline(struct perf_file_section *section,
goto error;
for (i = 0; i < nr; i++) {
- str = do_read_string(fd, ph);
+ str = do_read_string(ff->fd, ff->ph);
if (!str)
goto error;
@@ -1731,8 +1720,8 @@ static int process_cmdline(struct perf_file_section *section,
len += strlen(str) + 1;
free(str);
}
- ph->env.cmdline = cmdline;
- ph->env.cmdline_argv = (const char **) argv;
+ ff->ph->env.cmdline = cmdline;
+ ff->ph->env.cmdline_argv = (const char **) argv;
return 0;
error:
@@ -1741,21 +1730,21 @@ static int process_cmdline(struct perf_file_section *section,
return -1;
}
-static int process_cpu_topology(struct perf_file_section *section,
- struct perf_header *ph, int fd,
- void *data __maybe_unused)
+static int process_cpu_topology(struct feat_fd *ff, void *data __maybe_unused)
{
u32 nr, i;
char *str;
struct strbuf sb;
- int cpu_nr = ph->env.nr_cpus_avail;
+ int cpu_nr = ff->ph->env.nr_cpus_avail;
u64 size = 0;
+ struct perf_header *ph = ff->ph;
+ u64 start_offset = ff->offset;
ph->env.cpu = calloc(cpu_nr, sizeof(*ph->env.cpu));
if (!ph->env.cpu)
return -1;
- if (do_read_u32(fd, ph, &nr))
+ if (do_read_u32(ff->fd, ff->ph, &nr))
goto free_cpu;
ph->env.nr_sibling_cores = nr;
@@ -1764,7 +1753,7 @@ static int process_cpu_topology(struct perf_file_section *section,
goto free_cpu;
for (i = 0; i < nr; i++) {
- str = do_read_string(fd, ph);
+ str = do_read_string(ff->fd, ff->ph);
if (!str)
goto error;
@@ -1776,14 +1765,14 @@ static int process_cpu_topology(struct perf_file_section *section,
}
ph->env.sibling_cores = strbuf_detach(&sb, NULL);
- if (do_read_u32(fd, ph, &nr))
+ if (do_read_u32(ff->fd, ff->ph, &nr))
return -1;
ph->env.nr_sibling_threads = nr;
size += sizeof(u32);
for (i = 0; i < nr; i++) {
- str = do_read_string(fd, ph);
+ str = do_read_string(ff->fd, ff->ph);
if (!str)
goto error;
@@ -1799,18 +1788,18 @@ static int process_cpu_topology(struct perf_file_section *section,
* The header may be from old perf,
* which doesn't include core id and socket id information.
*/
- if (section->size <= size) {
+ if (ff->size <= ff->offset - start_offset) {
zfree(&ph->env.cpu);
return 0;
}
for (i = 0; i < (u32)cpu_nr; i++) {
- if (do_read_u32(fd, ph, &nr))
+ if (do_read_u32(ff->fd, ff->ph, &nr))
goto free_cpu;
ph->env.cpu[i].core_id = nr;
- if (do_read_u32(fd, ph, &nr))
+ if (do_read_u32(ff->fd, ff->ph, &nr))
goto free_cpu;
if (nr != (u32)-1 && nr > (u32)cpu_nr) {
@@ -1831,16 +1820,15 @@ static int process_cpu_topology(struct perf_file_section *section,
return -1;
}
-static int process_numa_topology(struct perf_file_section *section __maybe_unused,
- struct perf_header *ph, int fd,
- void *data __maybe_unused)
+static int process_numa_topology(struct feat_fd *ff, void *data __maybe_unused)
{
+ struct perf_header *ph = ff->ph;
struct numa_node *nodes, *n;
u32 nr, i;
char *str;
/* nr nodes */
- if (do_read_u32(fd, ph, &nr))
+ if (do_read_u32(ff->fd, ff->ph, &nr))
return -1;
nodes = zalloc(sizeof(*nodes) * nr);
@@ -1851,16 +1839,16 @@ static int process_numa_topology(struct perf_file_section *section __maybe_unuse
n = &nodes[i];
/* node number */
- if (do_read_u32(fd, ph, &n->node))
+ if (do_read_u32(ff->fd, ff->ph, &n->node))
goto error;
- if (do_read_u64(fd, ph, &n->mem_total))
+ if (do_read_u64(ff->fd, ff->ph, &n->mem_total))
goto error;
- if (do_read_u64(fd, ph, &n->mem_free))
+ if (do_read_u64(ff->fd, ff->ph, &n->mem_free))
goto error;
- str = do_read_string(fd, ph);
+ str = do_read_string(ff->fd, ff->ph);
if (!str)
goto error;
@@ -1879,16 +1867,15 @@ static int process_numa_topology(struct perf_file_section *section __maybe_unuse
return -1;
}
-static int process_pmu_mappings(struct perf_file_section *section __maybe_unused,
- struct perf_header *ph, int fd,
- void *data __maybe_unused)
+static int process_pmu_mappings(struct feat_fd *ff, void *data __maybe_unused)
{
+ struct perf_header *ph = ff->ph;
char *name;
u32 pmu_num;
u32 type;
struct strbuf sb;
- if (do_read_u32(fd, ph, &pmu_num))
+ if (do_read_u32(ff->fd, ff->ph, &pmu_num))
return -1;
if (!pmu_num) {
@@ -1901,10 +1888,10 @@ static int process_pmu_mappings(struct perf_file_section *section __maybe_unused
return -1;
while (pmu_num) {
- if (do_read_u32(fd, ph, &type))
+ if (do_read_u32(ff->fd, ff->ph, &type))
goto error;
- name = do_read_string(fd, ph);
+ name = do_read_string(ff->fd, ff->ph);
if (!name)
goto error;
@@ -1928,10 +1915,9 @@ static int process_pmu_mappings(struct perf_file_section *section __maybe_unused
return -1;
}
-static int process_group_desc(struct perf_file_section *section __maybe_unused,
- struct perf_header *ph, int fd,
- void *data __maybe_unused)
+static int process_group_desc(struct feat_fd *ff, void *data __maybe_unused)
{
+ struct perf_header *ph = ff->ph;
size_t ret = -1;
u32 i, nr, nr_groups;
struct perf_session *session;
@@ -1942,7 +1928,7 @@ static int process_group_desc(struct perf_file_section *section __maybe_unused,
u32 nr_members;
} *desc;
- if (do_read_u32(fd, ph, &nr_groups))
+ if (do_read_u32(ff->fd, ff->ph, &nr_groups))
return -1;
ph->env.nr_groups = nr_groups;
@@ -1956,14 +1942,14 @@ static int process_group_desc(struct perf_file_section *section __maybe_unused,
return -1;
for (i = 0; i < nr_groups; i++) {
- desc[i].name = do_read_string(fd, ph);
+ desc[i].name = do_read_string(ff->fd, ff->ph);
if (!desc[i].name)
goto out_free;
- if (do_read_u32(fd, ph, &desc[i].leader_idx))
+ if (do_read_u32(ff->fd, ff->ph, &desc[i].leader_idx))
goto out_free;
- if (do_read_u32(fd, ph, &desc[i].nr_members))
+ if (do_read_u32(ff->fd, ff->ph, &desc[i].nr_members))
goto out_free;
}
@@ -2014,36 +2000,32 @@ static int process_group_desc(struct perf_file_section *section __maybe_unused,
return ret;
}
-static int process_auxtrace(struct perf_file_section *section,
- struct perf_header *ph, int fd,
- void *data __maybe_unused)
+static int process_auxtrace(struct feat_fd *ff, void *data __maybe_unused)
{
struct perf_session *session;
int err;
- session = container_of(ph, struct perf_session, header);
+ session = container_of(ff->ph, struct perf_session, header);
- err = auxtrace_index__process(fd, section->size, session,
- ph->needs_swap);
+ err = auxtrace_index__process(ff->fd, ff->size, session,
+ ff->ph->needs_swap);
if (err < 0)
pr_err("Failed to process auxtrace index\n");
return err;
}
-static int process_cache(struct perf_file_section *section __maybe_unused,
- struct perf_header *ph __maybe_unused, int fd __maybe_unused,
- void *data __maybe_unused)
+static int process_cache(struct feat_fd *ff, void *data __maybe_unused)
{
struct cpu_cache_level *caches;
u32 cnt, i, version;
- if (do_read_u32(fd, ph, &version))
+ if (do_read_u32(ff->fd, ff->ph, &version))
return -1;
if (version != 1)
return -1;
- if (do_read_u32(fd, ph, &cnt))
+ if (do_read_u32(ff->fd, ff->ph, &cnt))
return -1;
caches = zalloc(sizeof(*caches) * cnt);
@@ -2054,7 +2036,7 @@ static int process_cache(struct perf_file_section *section __maybe_unused,
struct cpu_cache_level c;
#define _R(v) \
- if (do_read_u32(fd, ph, &c.v))\
+ if (do_read_u32(ff->fd, ff->ph, &c.v))\
goto out_free_caches; \
_R(level)
@@ -2063,9 +2045,9 @@ static int process_cache(struct perf_file_section *section __maybe_unused,
_R(ways)
#undef _R
- #define _R(v) \
- c.v = do_read_string(fd, ph); \
- if (!c.v) \
+ #define _R(v) \
+ c.v = do_read_string(ff->fd, ff->ph); \
+ if (!c.v) \
goto out_free_caches;
_R(type)
@@ -2076,8 +2058,8 @@ static int process_cache(struct perf_file_section *section __maybe_unused,
caches[i] = c;
}
- ph->env.caches = caches;
- ph->env.caches_cnt = cnt;
+ ff->ph->env.caches = caches;
+ ff->ph->env.caches_cnt = cnt;
return 0;
out_free_caches:
free(caches);
@@ -2087,8 +2069,7 @@ static int process_cache(struct perf_file_section *section __maybe_unused,
struct feature_ops {
int (*write)(struct feat_fd *ff, struct perf_evlist *evlist);
void (*print)(struct feat_fd *ff, FILE *fp);
- int (*process)(struct perf_file_section *section,
- struct perf_header *h, int fd, void *data);
+ int (*process)(struct feat_fd *ff, void *data);
const char *name;
bool full_only;
};
@@ -2619,6 +2600,13 @@ static int perf_file_section__process(struct perf_file_section *section,
struct perf_header *ph,
int feat, int fd, void *data)
{
+ struct feat_fd fdd = {
+ .fd = fd,
+ .ph = ph,
+ .size = section->size,
+ .offset = section->offset,
+ };
+
if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) {
pr_debug("Failed to lseek to %" PRIu64 " offset for feature "
"%d, continuing...\n", section->offset, feat);
@@ -2633,7 +2621,7 @@ static int perf_file_section__process(struct perf_file_section *section,
if (!feat_ops[feat].process)
return 0;
- return feat_ops[feat].process(section, ph, fd, data);
+ return feat_ops[feat].process(&fdd, data);
}
static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
--
2.13.1.508.gb3defc5cc-goog
^ permalink raw reply related [flat|nested] 27+ messages in thread* Re: [PATCH v3 08/15] perf header: use struct feat_fd to process header records
2017-06-06 7:07 ` [PATCH v3 08/15] perf header: use struct feat_fd to process header records David Carrillo-Cisneros
@ 2017-06-08 11:54 ` Jiri Olsa
2017-06-13 4:18 ` David Carrillo-Cisneros
0 siblings, 1 reply; 27+ messages in thread
From: Jiri Olsa @ 2017-06-08 11:54 UTC (permalink / raw)
To: David Carrillo-Cisneros
Cc: linux-kernel, Peter Zijlstra, Ingo Molnar,
Arnaldo Carvalho de Melo, Alexander Shishkin, Andi Kleen,
Simon Que, Wang Nan, Jiri Olsa, He Kuang, Masami Hiramatsu,
Stephane Eranian, Paul Turner
On Tue, Jun 06, 2017 at 12:07:15AM -0700, David Carrillo-Cisneros wrote:
SNIP
> +static int process_cpu_topology(struct feat_fd *ff, void *data __maybe_unused)
> {
> u32 nr, i;
> char *str;
> struct strbuf sb;
> - int cpu_nr = ph->env.nr_cpus_avail;
> + int cpu_nr = ff->ph->env.nr_cpus_avail;
> u64 size = 0;
> + struct perf_header *ph = ff->ph;
> + u64 start_offset = ff->offset;
>
> ph->env.cpu = calloc(cpu_nr, sizeof(*ph->env.cpu));
> if (!ph->env.cpu)
> return -1;
>
> - if (do_read_u32(fd, ph, &nr))
> + if (do_read_u32(ff->fd, ff->ph, &nr))
> goto free_cpu;
>
> ph->env.nr_sibling_cores = nr;
> @@ -1764,7 +1753,7 @@ static int process_cpu_topology(struct perf_file_section *section,
> goto free_cpu;
>
> for (i = 0; i < nr; i++) {
> - str = do_read_string(fd, ph);
> + str = do_read_string(ff->fd, ff->ph);
> if (!str)
> goto error;
>
> @@ -1776,14 +1765,14 @@ static int process_cpu_topology(struct perf_file_section *section,
> }
> ph->env.sibling_cores = strbuf_detach(&sb, NULL);
>
> - if (do_read_u32(fd, ph, &nr))
> + if (do_read_u32(ff->fd, ff->ph, &nr))
> return -1;
>
> ph->env.nr_sibling_threads = nr;
> size += sizeof(u32);
>
> for (i = 0; i < nr; i++) {
> - str = do_read_string(fd, ph);
> + str = do_read_string(ff->fd, ff->ph);
> if (!str)
> goto error;
>
> @@ -1799,18 +1788,18 @@ static int process_cpu_topology(struct perf_file_section *section,
> * The header may be from old perf,
> * which doesn't include core id and socket id information.
> */
> - if (section->size <= size) {
> + if (ff->size <= ff->offset - start_offset) {
I'm lost here? how is ff->offset incremented? what's 'size' good for now?
thanks,
jirka
^ permalink raw reply [flat|nested] 27+ messages in thread* Re: [PATCH v3 08/15] perf header: use struct feat_fd to process header records
2017-06-08 11:54 ` Jiri Olsa
@ 2017-06-13 4:18 ` David Carrillo-Cisneros
0 siblings, 0 replies; 27+ messages in thread
From: David Carrillo-Cisneros @ 2017-06-13 4:18 UTC (permalink / raw)
To: Jiri Olsa
Cc: linux-kernel, Peter Zijlstra, Ingo Molnar,
Arnaldo Carvalho de Melo, Alexander Shishkin, Andi Kleen,
Simon Que, Wang Nan, Jiri Olsa, He Kuang, Masami Hiramatsu,
Stephane Eranian, Paul Turner
Good catch. The logic hasnt broken, this change is wrong. Fixed in next version.
On Thu, Jun 8, 2017 at 4:54 AM, Jiri Olsa <jolsa@redhat.com> wrote:
> On Tue, Jun 06, 2017 at 12:07:15AM -0700, David Carrillo-Cisneros wrote:
>
> SNIP
>
>> +static int process_cpu_topology(struct feat_fd *ff, void *data __maybe_unused)
>> {
>> u32 nr, i;
>> char *str;
>> struct strbuf sb;
>> - int cpu_nr = ph->env.nr_cpus_avail;
>> + int cpu_nr = ff->ph->env.nr_cpus_avail;
>> u64 size = 0;
>> + struct perf_header *ph = ff->ph;
>> + u64 start_offset = ff->offset;
>>
>> ph->env.cpu = calloc(cpu_nr, sizeof(*ph->env.cpu));
>> if (!ph->env.cpu)
>> return -1;
>>
>> - if (do_read_u32(fd, ph, &nr))
>> + if (do_read_u32(ff->fd, ff->ph, &nr))
>> goto free_cpu;
>>
>> ph->env.nr_sibling_cores = nr;
>> @@ -1764,7 +1753,7 @@ static int process_cpu_topology(struct perf_file_section *section,
>> goto free_cpu;
>>
>> for (i = 0; i < nr; i++) {
>> - str = do_read_string(fd, ph);
>> + str = do_read_string(ff->fd, ff->ph);
>> if (!str)
>> goto error;
>>
>> @@ -1776,14 +1765,14 @@ static int process_cpu_topology(struct perf_file_section *section,
>> }
>> ph->env.sibling_cores = strbuf_detach(&sb, NULL);
>>
>> - if (do_read_u32(fd, ph, &nr))
>> + if (do_read_u32(ff->fd, ff->ph, &nr))
>> return -1;
>>
>> ph->env.nr_sibling_threads = nr;
>> size += sizeof(u32);
>>
>> for (i = 0; i < nr; i++) {
>> - str = do_read_string(fd, ph);
>> + str = do_read_string(ff->fd, ff->ph);
>> if (!str)
>> goto error;
>>
>> @@ -1799,18 +1788,18 @@ static int process_cpu_topology(struct perf_file_section *section,
>> * The header may be from old perf,
>> * which doesn't include core id and socket id information.
>> */
>> - if (section->size <= size) {
>> + if (ff->size <= ff->offset - start_offset) {
>
> I'm lost here? how is ff->offset incremented? what's 'size' good for now?
>
> thanks,
> jirka
^ permalink raw reply [flat|nested] 27+ messages in thread
* [PATCH v3 09/15] perf header: use struct feat_fd in read header records
2017-06-06 7:07 [PATCH v3 00/15] perf tool: add meta-data header support for pipe-mode David Carrillo-Cisneros
` (7 preceding siblings ...)
2017-06-06 7:07 ` [PATCH v3 08/15] perf header: use struct feat_fd to process header records David Carrillo-Cisneros
@ 2017-06-06 7:07 ` David Carrillo-Cisneros
2017-06-06 7:07 ` [PATCH v3 10/15] perf header: make write_pmu_mappings pipe-mode friendly David Carrillo-Cisneros
` (6 subsequent siblings)
15 siblings, 0 replies; 27+ messages in thread
From: David Carrillo-Cisneros @ 2017-06-06 7:07 UTC (permalink / raw)
To: linux-kernel
Cc: Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo,
Alexander Shishkin, Andi Kleen, Simon Que, Wang Nan, Jiri Olsa,
He Kuang, Masami Hiramatsu, Stephane Eranian, Paul Turner,
David Carrillo-Cisneros
As preparation for using header records in-pipe mode, replace
int fd with struct feat_fd ff in read functions for all header
record types.
This patch does not change behavior.
Signed-off-by: David Carrillo-Cisneros <davidcc@google.com>
---
| 105 +++++++++++++++++++++++------------------------
1 file changed, 52 insertions(+), 53 deletions(-)
--git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 3f22258a633f..f607c3c00f49 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -125,54 +125,54 @@ static int do_write_string(struct feat_fd *ff, const char *str)
return write_padded(ff, str, olen, len);
}
-static int __do_read(int fd, void *addr, ssize_t size)
+static int __do_read(struct feat_fd *ff, void *addr, ssize_t size)
{
- ssize_t ret = readn(fd, addr, size);
+ ssize_t ret = readn(ff->fd, addr, size);
if (ret != size)
return ret < 0 ? (int)ret : -1;
return 0;
}
-static int do_read_u32(int fd, struct perf_header *ph, u32 *addr)
+static int do_read_u32(struct feat_fd *ff, u32 *addr)
{
int ret;
- ret = __do_read(fd, addr, sizeof(*addr));
+ ret = __do_read(ff, addr, sizeof(*addr));
if (ret)
return ret;
- if (ph->needs_swap)
+ if (ff->ph->needs_swap)
*addr = bswap_32(*addr);
return 0;
}
-static int do_read_u64(int fd, struct perf_header *ph, u64 *addr)
+static int do_read_u64(struct feat_fd *ff, u64 *addr)
{
int ret;
- ret = __do_read(fd, addr, sizeof(*addr));
+ ret = __do_read(ff, addr, sizeof(*addr));
if (ret)
return ret;
- if (ph->needs_swap)
+ if (ff->ph->needs_swap)
*addr = bswap_64(*addr);
return 0;
}
-static char *do_read_string(int fd, struct perf_header *ph)
+static char *do_read_string(struct feat_fd *ff)
{
u32 len;
char *buf;
- if (do_read_u32(fd, ph, &len))
+ if (do_read_u32(ff, &len))
return NULL;
buf = malloc(len);
if (!buf)
return NULL;
- if (!__do_read(fd, buf, len)) {
+ if (!__do_read(ff, buf, len)) {
/*
* strings are padded by zeroes
* thus the actual strlen of buf
@@ -1207,8 +1207,7 @@ static void free_event_desc(struct perf_evsel *events)
free(events);
}
-static struct perf_evsel *
-read_event_desc(struct perf_header *ph, int fd)
+static struct perf_evsel *read_event_desc(struct feat_fd *ff)
{
struct perf_evsel *evsel, *events = NULL;
u64 *id;
@@ -1217,10 +1216,10 @@ read_event_desc(struct perf_header *ph, int fd)
size_t msz;
/* number of events */
- if (do_read_u32(fd, ph, &nre))
+ if (do_read_u32(ff, &nre))
goto error;
- if (do_read_u32(fd, ph, &sz))
+ if (do_read_u32(ff, &sz))
goto error;
/* buffer to hold on file attr struct */
@@ -1244,21 +1243,21 @@ read_event_desc(struct perf_header *ph, int fd)
* must read entire on-file attr struct to
* sync up with layout.
*/
- if (__do_read(fd, buf, sz))
+ if (__do_read(ff, buf, sz))
goto error;
- if (ph->needs_swap)
+ if (ff->ph->needs_swap)
perf_event__attr_swap(buf);
memcpy(&evsel->attr, buf, msz);
- if (do_read_u32(fd, ph, &nr))
+ if (do_read_u32(ff, &nr))
goto error;
- if (ph->needs_swap)
+ if (ff->ph->needs_swap)
evsel->needs_swap = true;
- evsel->name = do_read_string(fd, ph);
+ evsel->name = do_read_string(ff);
if (!evsel->name)
goto error;
@@ -1272,7 +1271,7 @@ read_event_desc(struct perf_header *ph, int fd)
evsel->id = id;
for (j = 0 ; j < nr; j++) {
- if (do_read_u64(fd, ph, id))
+ if (do_read_u64(ff, id))
goto error;
id++;
}
@@ -1294,7 +1293,7 @@ static int __desc_attr__fprintf(FILE *fp, const char *name, const char *val,
static void print_event_desc(struct feat_fd *ff, FILE *fp)
{
- struct perf_evsel *evsel, *events = read_event_desc(ff->ph, ff->fd);
+ struct perf_evsel *evsel, *events = read_event_desc(ff);
u32 j;
u64 *id;
@@ -1588,7 +1587,7 @@ static int perf_header__read_build_ids(struct perf_header *header,
#define FEAT_PROCESS_STR_FUN(__feat, __feat_env) \
static int process_##__feat(struct feat_fd *ff, void *data __maybe_unused) \
{\
- ff->ph->env.__feat_env = do_read_string(ff->fd, ff->ph); \
+ ff->ph->env.__feat_env = do_read_string(ff); \
return ff->ph->env.__feat_env ? 0 : -ENOMEM; \
}
@@ -1618,11 +1617,11 @@ static int process_nrcpus(struct feat_fd *ff, void *data __maybe_unused)
int ret;
u32 nr_cpus_avail, nr_cpus_online;
- ret = do_read_u32(ff->fd, ff->ph, &nr_cpus_avail);
+ ret = do_read_u32(ff, &nr_cpus_avail);
if (ret)
return ret;
- ret = do_read_u32(ff->fd, ff->ph, &nr_cpus_online);
+ ret = do_read_u32(ff, &nr_cpus_online);
if (ret)
return ret;
ff->ph->env.nr_cpus_avail = (int)nr_cpus_avail;
@@ -1635,7 +1634,7 @@ static int process_total_mem(struct feat_fd *ff, void *data __maybe_unused)
u64 total_mem;
int ret;
- ret = do_read_u64(ff->fd, ff->ph, &total_mem);
+ ret = do_read_u64(ff, &total_mem);
if (ret)
return -1;
ff->ph->env.total_mem = (unsigned long long)total_mem;
@@ -1678,7 +1677,7 @@ static int
process_event_desc(struct feat_fd *ff, void *data __maybe_unused)
{
struct perf_session *session;
- struct perf_evsel *evsel, *events = read_event_desc(ff->ph, ff->fd);
+ struct perf_evsel *evsel, *events = read_event_desc(ff);
if (!events)
return 0;
@@ -1697,7 +1696,7 @@ static int process_cmdline(struct feat_fd *ff, void *data __maybe_unused)
char *str, *cmdline = NULL, **argv = NULL;
u32 nr, i, len = 0;
- if (do_read_u32(ff->fd, ff->ph, &nr))
+ if (do_read_u32(ff, &nr))
return -1;
ff->ph->env.nr_cmdline = nr;
@@ -1711,7 +1710,7 @@ static int process_cmdline(struct feat_fd *ff, void *data __maybe_unused)
goto error;
for (i = 0; i < nr; i++) {
- str = do_read_string(ff->fd, ff->ph);
+ str = do_read_string(ff);
if (!str)
goto error;
@@ -1744,7 +1743,7 @@ static int process_cpu_topology(struct feat_fd *ff, void *data __maybe_unused)
if (!ph->env.cpu)
return -1;
- if (do_read_u32(ff->fd, ff->ph, &nr))
+ if (do_read_u32(ff, &nr))
goto free_cpu;
ph->env.nr_sibling_cores = nr;
@@ -1753,7 +1752,7 @@ static int process_cpu_topology(struct feat_fd *ff, void *data __maybe_unused)
goto free_cpu;
for (i = 0; i < nr; i++) {
- str = do_read_string(ff->fd, ff->ph);
+ str = do_read_string(ff);
if (!str)
goto error;
@@ -1765,14 +1764,14 @@ static int process_cpu_topology(struct feat_fd *ff, void *data __maybe_unused)
}
ph->env.sibling_cores = strbuf_detach(&sb, NULL);
- if (do_read_u32(ff->fd, ff->ph, &nr))
+ if (do_read_u32(ff, &nr))
return -1;
ph->env.nr_sibling_threads = nr;
size += sizeof(u32);
for (i = 0; i < nr; i++) {
- str = do_read_string(ff->fd, ff->ph);
+ str = do_read_string(ff);
if (!str)
goto error;
@@ -1794,12 +1793,12 @@ static int process_cpu_topology(struct feat_fd *ff, void *data __maybe_unused)
}
for (i = 0; i < (u32)cpu_nr; i++) {
- if (do_read_u32(ff->fd, ff->ph, &nr))
+ if (do_read_u32(ff, &nr))
goto free_cpu;
ph->env.cpu[i].core_id = nr;
- if (do_read_u32(ff->fd, ff->ph, &nr))
+ if (do_read_u32(ff, &nr))
goto free_cpu;
if (nr != (u32)-1 && nr > (u32)cpu_nr) {
@@ -1828,7 +1827,7 @@ static int process_numa_topology(struct feat_fd *ff, void *data __maybe_unused)
char *str;
/* nr nodes */
- if (do_read_u32(ff->fd, ff->ph, &nr))
+ if (do_read_u32(ff, &nr))
return -1;
nodes = zalloc(sizeof(*nodes) * nr);
@@ -1839,16 +1838,16 @@ static int process_numa_topology(struct feat_fd *ff, void *data __maybe_unused)
n = &nodes[i];
/* node number */
- if (do_read_u32(ff->fd, ff->ph, &n->node))
+ if (do_read_u32(ff, &n->node))
goto error;
- if (do_read_u64(ff->fd, ff->ph, &n->mem_total))
+ if (do_read_u64(ff, &n->mem_total))
goto error;
- if (do_read_u64(ff->fd, ff->ph, &n->mem_free))
+ if (do_read_u64(ff, &n->mem_free))
goto error;
- str = do_read_string(ff->fd, ff->ph);
+ str = do_read_string(ff);
if (!str)
goto error;
@@ -1875,7 +1874,7 @@ static int process_pmu_mappings(struct feat_fd *ff, void *data __maybe_unused)
u32 type;
struct strbuf sb;
- if (do_read_u32(ff->fd, ff->ph, &pmu_num))
+ if (do_read_u32(ff, &pmu_num))
return -1;
if (!pmu_num) {
@@ -1888,10 +1887,10 @@ static int process_pmu_mappings(struct feat_fd *ff, void *data __maybe_unused)
return -1;
while (pmu_num) {
- if (do_read_u32(ff->fd, ff->ph, &type))
+ if (do_read_u32(ff, &type))
goto error;
- name = do_read_string(ff->fd, ff->ph);
+ name = do_read_string(ff);
if (!name)
goto error;
@@ -1928,7 +1927,7 @@ static int process_group_desc(struct feat_fd *ff, void *data __maybe_unused)
u32 nr_members;
} *desc;
- if (do_read_u32(ff->fd, ff->ph, &nr_groups))
+ if (do_read_u32(ff, &nr_groups))
return -1;
ph->env.nr_groups = nr_groups;
@@ -1942,14 +1941,14 @@ static int process_group_desc(struct feat_fd *ff, void *data __maybe_unused)
return -1;
for (i = 0; i < nr_groups; i++) {
- desc[i].name = do_read_string(ff->fd, ff->ph);
+ desc[i].name = do_read_string(ff);
if (!desc[i].name)
goto out_free;
- if (do_read_u32(ff->fd, ff->ph, &desc[i].leader_idx))
+ if (do_read_u32(ff, &desc[i].leader_idx))
goto out_free;
- if (do_read_u32(ff->fd, ff->ph, &desc[i].nr_members))
+ if (do_read_u32(ff, &desc[i].nr_members))
goto out_free;
}
@@ -2019,13 +2018,13 @@ static int process_cache(struct feat_fd *ff, void *data __maybe_unused)
struct cpu_cache_level *caches;
u32 cnt, i, version;
- if (do_read_u32(ff->fd, ff->ph, &version))
+ if (do_read_u32(ff, &version))
return -1;
if (version != 1)
return -1;
- if (do_read_u32(ff->fd, ff->ph, &cnt))
+ if (do_read_u32(ff, &cnt))
return -1;
caches = zalloc(sizeof(*caches) * cnt);
@@ -2036,7 +2035,7 @@ static int process_cache(struct feat_fd *ff, void *data __maybe_unused)
struct cpu_cache_level c;
#define _R(v) \
- if (do_read_u32(ff->fd, ff->ph, &c.v))\
+ if (do_read_u32(ff, &c.v))\
goto out_free_caches; \
_R(level)
@@ -2045,9 +2044,9 @@ static int process_cache(struct feat_fd *ff, void *data __maybe_unused)
_R(ways)
#undef _R
- #define _R(v) \
- c.v = do_read_string(ff->fd, ff->ph); \
- if (!c.v) \
+ #define _R(v) \
+ c.v = do_read_string(ff); \
+ if (!c.v) \
goto out_free_caches;
_R(type)
--
2.13.1.508.gb3defc5cc-goog
^ permalink raw reply related [flat|nested] 27+ messages in thread* [PATCH v3 10/15] perf header: make write_pmu_mappings pipe-mode friendly
2017-06-06 7:07 [PATCH v3 00/15] perf tool: add meta-data header support for pipe-mode David Carrillo-Cisneros
` (8 preceding siblings ...)
2017-06-06 7:07 ` [PATCH v3 09/15] perf header: use struct feat_fd in read " David Carrillo-Cisneros
@ 2017-06-06 7:07 ` David Carrillo-Cisneros
2017-06-06 7:07 ` [PATCH v3 11/15] perf header: add a buffer to struct feat_fd David Carrillo-Cisneros
` (5 subsequent siblings)
15 siblings, 0 replies; 27+ messages in thread
From: David Carrillo-Cisneros @ 2017-06-06 7:07 UTC (permalink / raw)
To: linux-kernel
Cc: Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo,
Alexander Shishkin, Andi Kleen, Simon Que, Wang Nan, Jiri Olsa,
He Kuang, Masami Hiramatsu, Stephane Eranian, Paul Turner,
David Carrillo-Cisneros
In pipe-mode, we will operate over a buffer instead of a file descriptor
but write_pmu_mappings uses lseek to move over the perf.data file.
Refactor write_pmu_mappings to avoid the usage of lseek and allow
reusing the same logic in pipe-mode (next patch).
Signed-off-by: David Carrillo-Cisneros <davidcc@google.com>
---
| 21 +++++++++++----------
1 file changed, 11 insertions(+), 10 deletions(-)
--git a/tools/perf/util/header.c b/tools/perf/util/header.c
index f607c3c00f49..323ccd5df382 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -796,11 +796,19 @@ static int write_pmu_mappings(struct feat_fd *ff,
struct perf_evlist *evlist __maybe_unused)
{
struct perf_pmu *pmu = NULL;
- off_t offset = lseek(ff->fd, 0, SEEK_CUR);
- __u32 pmu_num = 0;
+ u32 pmu_num = 0;
int ret;
- /* write real pmu_num later */
+ /*
+ * Do a first pass to count number of pmu to avoid lseek so this
+ * works in pipe mode as well.
+ */
+ while ((pmu = perf_pmu__scan(pmu))) {
+ if (!pmu->name)
+ continue;
+ pmu_num++;
+ }
+
ret = do_write(ff, &pmu_num, sizeof(pmu_num));
if (ret < 0)
return ret;
@@ -808,7 +816,6 @@ static int write_pmu_mappings(struct feat_fd *ff,
while ((pmu = perf_pmu__scan(pmu))) {
if (!pmu->name)
continue;
- pmu_num++;
ret = do_write(ff, &pmu->type, sizeof(pmu->type));
if (ret < 0)
@@ -819,12 +826,6 @@ static int write_pmu_mappings(struct feat_fd *ff,
return ret;
}
- if (pwrite(ff->fd, &pmu_num, sizeof(pmu_num), offset) != sizeof(pmu_num)) {
- /* discard all */
- lseek(ff->fd, offset, SEEK_SET);
- return -1;
- }
-
return 0;
}
--
2.13.1.508.gb3defc5cc-goog
^ permalink raw reply related [flat|nested] 27+ messages in thread* [PATCH v3 11/15] perf header: add a buffer to struct feat_fd
2017-06-06 7:07 [PATCH v3 00/15] perf tool: add meta-data header support for pipe-mode David Carrillo-Cisneros
` (9 preceding siblings ...)
2017-06-06 7:07 ` [PATCH v3 10/15] perf header: make write_pmu_mappings pipe-mode friendly David Carrillo-Cisneros
@ 2017-06-06 7:07 ` David Carrillo-Cisneros
2017-06-08 11:54 ` Jiri Olsa
2017-06-08 11:54 ` Jiri Olsa
2017-06-06 7:07 ` [PATCH v3 12/15] perf header: change FEAT_OP* macros David Carrillo-Cisneros
` (4 subsequent siblings)
15 siblings, 2 replies; 27+ messages in thread
From: David Carrillo-Cisneros @ 2017-06-06 7:07 UTC (permalink / raw)
To: linux-kernel
Cc: Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo,
Alexander Shishkin, Andi Kleen, Simon Que, Wang Nan, Jiri Olsa,
He Kuang, Masami Hiramatsu, Stephane Eranian, Paul Turner,
David Carrillo-Cisneros
Extend struct feat_fd to use a temporal buffer in pipe-mode, instead
of perf.data's file descriptor.
The header features build_id and aux_trace already have logic to
print in file-mode that heavily rely on lseek the file. For now, leave
such features inactive in pipe-mode and print a warning if their
functions are called in pipe-mode.
Signed-off-by: David Carrillo-Cisneros <davidcc@google.com>
---
| 83 +++++++++++++++++++++++++++++++++++++++++-------
1 file changed, 72 insertions(+), 11 deletions(-)
--git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 323ccd5df382..109675b35fab 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -61,6 +61,7 @@ struct perf_file_attr {
struct feat_fd {
struct perf_header *ph;
int fd;
+ void *buf; /* Either buf != NULL or fd >= 0 */
ssize_t offset;
size_t size;
};
@@ -80,18 +81,43 @@ bool perf_header__has_feat(const struct perf_header *header, int feat)
return test_bit(feat, header->adds_features);
}
-/* Return: 0 if succeded, -ERR if failed. */
-int do_write(struct feat_fd *ff, const void *buf, size_t size)
+static int __do_write_fd(struct feat_fd *ff, const void *buf, size_t size)
{
- ssize_t ret;
+ ssize_t ret = writen(ff->fd, buf, size);
- ret = writen(ff->fd, buf, size);
if (ret != (ssize_t)size)
- return ret < 0 ? (int)ret: -1;
+ return ret < 0 ? (int)ret : -1;
+ return 0;
+}
+
+static int __do_write_buf(struct feat_fd *ff, const void *buf, size_t size)
+{
+ void *addr;
+
+retry:
+ if (size > (ff->size - ff->offset)) {
+ addr = realloc(ff->buf, ff->size << 1);
+ if (!addr)
+ return -ENOSPC;
+ ff->buf = addr;
+ ff->size <<= 1;
+ goto retry;
+ }
+
+ memcpy(ff->buf + ff->offset, buf, size);
+ ff->offset += size;
return 0;
}
+/* Return: 0 if succeded, -ERR if failed. */
+int do_write(struct feat_fd *ff, const void *buf, size_t size)
+{
+ if (!ff->buf)
+ return __do_write_fd(ff, buf, size);
+ return __do_write_buf(ff, buf, size);
+}
+
/* Return: 0 if succeded, -ERR if failed. */
int write_padded(struct feat_fd *ff, const void *bf,
size_t count, size_t count_aligned)
@@ -125,13 +151,32 @@ static int do_write_string(struct feat_fd *ff, const char *str)
return write_padded(ff, str, olen, len);
}
-static int __do_read(struct feat_fd *ff, void *addr, ssize_t size)
+static int __do_read_fd(struct feat_fd *ff, void *addr, ssize_t size)
{
- ssize_t ret = readn(ff->fd, addr, size);
+ ssize_t ret = readn(ff->fd, addr, size);
+
+ if (ret != size)
+ return ret < 0 ? (int)ret : -1;
+ return 0;
+}
+
+static int __do_read_buf(struct feat_fd *ff, void *addr, ssize_t size)
+{
+ if (size > (ssize_t)ff->size - ff->offset)
+ return -1;
+
+ memcpy(addr, ff->buf + ff->offset, size);
+ ff->offset += size;
- if (ret != size)
- return ret < 0 ? (int)ret : -1;
return 0;
+
+}
+
+static int __do_read(struct feat_fd *ff, void *addr, ssize_t size)
+{
+ if (!ff->buf)
+ return __do_read_fd(ff, addr, size);
+ return __do_read_buf(ff, addr, size);
}
static int do_read_u32(struct feat_fd *ff, u32 *addr)
@@ -188,6 +233,10 @@ static char *do_read_string(struct feat_fd *ff)
static int write_tracing_data(struct feat_fd *ff,
struct perf_evlist *evlist)
{
+ if (ff->buf) {
+ WARN_ON("Pipe-mode doesn't supported write_tracing_data.\n");
+ return -1;
+ }
return read_tracing_data(ff->fd, &evlist->entries);
}
@@ -202,6 +251,10 @@ static int write_build_id(struct feat_fd *ff,
if (!perf_session__read_build_ids(session, true))
return -1;
+ if (ff->buf) {
+ WARN_ON("Pipe-mode doesn't support write_build_id.\n");
+ return -1;
+ }
err = perf_session__write_buildid_table(session, ff);
if (err < 0) {
pr_debug("failed to write buildid table\n");
@@ -911,6 +964,10 @@ static int write_auxtrace(struct feat_fd *ff,
struct perf_session *session;
int err;
+ if (ff->buf) {
+ pr_err("Unsupported write_auxtrace to memory buffer.\n");
+ return -1;
+ }
session = container_of(ff->ph, struct perf_session, header);
err = auxtrace_index__write(ff->fd, &session->auxtrace_index);
@@ -2192,6 +2249,10 @@ static int do_write_feat(struct feat_fd *ff, int type,
if (!feat_ops[type].write)
return -1;
+ if (ff->buf) {
+ pr_err("Called %s for memory buffer.\n", __func__);
+ return -1;
+ }
(*p)->offset = lseek(ff->fd, 0, SEEK_CUR);
err = feat_ops[type].write(ff, evlist);
@@ -2600,7 +2661,7 @@ static int perf_file_section__process(struct perf_file_section *section,
struct perf_header *ph,
int feat, int fd, void *data)
{
- struct feat_fd fdd = {
+ struct feat_fd ff = {
.fd = fd,
.ph = ph,
.size = section->size,
@@ -2621,7 +2682,7 @@ static int perf_file_section__process(struct perf_file_section *section,
if (!feat_ops[feat].process)
return 0;
- return feat_ops[feat].process(&fdd, data);
+ return feat_ops[feat].process(&ff, data);
}
static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
--
2.13.1.508.gb3defc5cc-goog
^ permalink raw reply related [flat|nested] 27+ messages in thread* Re: [PATCH v3 11/15] perf header: add a buffer to struct feat_fd
2017-06-06 7:07 ` [PATCH v3 11/15] perf header: add a buffer to struct feat_fd David Carrillo-Cisneros
@ 2017-06-08 11:54 ` Jiri Olsa
2017-06-08 11:54 ` Jiri Olsa
1 sibling, 0 replies; 27+ messages in thread
From: Jiri Olsa @ 2017-06-08 11:54 UTC (permalink / raw)
To: David Carrillo-Cisneros
Cc: linux-kernel, Peter Zijlstra, Ingo Molnar,
Arnaldo Carvalho de Melo, Alexander Shishkin, Andi Kleen,
Simon Que, Wang Nan, Jiri Olsa, He Kuang, Masami Hiramatsu,
Stephane Eranian, Paul Turner
On Tue, Jun 06, 2017 at 12:07:18AM -0700, David Carrillo-Cisneros wrote:
SNIP
> static int do_read_u32(struct feat_fd *ff, u32 *addr)
> @@ -188,6 +233,10 @@ static char *do_read_string(struct feat_fd *ff)
> static int write_tracing_data(struct feat_fd *ff,
> struct perf_evlist *evlist)
> {
> + if (ff->buf) {
> + WARN_ON("Pipe-mode doesn't supported write_tracing_data.\n");
> + return -1;
> + }
I think you need to use WARN or WARN_ONCE here, like:
if (WARN_ONCE(ff->buf, "Pipe....."))
return -1;
WARN_ON takes condition as an argument not string
jirka
^ permalink raw reply [flat|nested] 27+ messages in thread* Re: [PATCH v3 11/15] perf header: add a buffer to struct feat_fd
2017-06-06 7:07 ` [PATCH v3 11/15] perf header: add a buffer to struct feat_fd David Carrillo-Cisneros
2017-06-08 11:54 ` Jiri Olsa
@ 2017-06-08 11:54 ` Jiri Olsa
1 sibling, 0 replies; 27+ messages in thread
From: Jiri Olsa @ 2017-06-08 11:54 UTC (permalink / raw)
To: David Carrillo-Cisneros
Cc: linux-kernel, Peter Zijlstra, Ingo Molnar,
Arnaldo Carvalho de Melo, Alexander Shishkin, Andi Kleen,
Simon Que, Wang Nan, Jiri Olsa, He Kuang, Masami Hiramatsu,
Stephane Eranian, Paul Turner
On Tue, Jun 06, 2017 at 12:07:18AM -0700, David Carrillo-Cisneros wrote:
SNIP
> @@ -2600,7 +2661,7 @@ static int perf_file_section__process(struct perf_file_section *section,
> struct perf_header *ph,
> int feat, int fd, void *data)
> {
> - struct feat_fd fdd = {
> + struct feat_fd ff = {
> .fd = fd,
> .ph = ph,
> .size = section->size,
> @@ -2621,7 +2682,7 @@ static int perf_file_section__process(struct perf_file_section *section,
> if (!feat_ops[feat].process)
> return 0;
>
> - return feat_ops[feat].process(&fdd, data);
> + return feat_ops[feat].process(&ff, data);
> }
should be part of the previous patch that introduced this
jirka
^ permalink raw reply [flat|nested] 27+ messages in thread
* [PATCH v3 12/15] perf header: change FEAT_OP* macros
2017-06-06 7:07 [PATCH v3 00/15] perf tool: add meta-data header support for pipe-mode David Carrillo-Cisneros
` (10 preceding siblings ...)
2017-06-06 7:07 ` [PATCH v3 11/15] perf header: add a buffer to struct feat_fd David Carrillo-Cisneros
@ 2017-06-06 7:07 ` David Carrillo-Cisneros
2017-06-06 7:07 ` [PATCH v3 13/15] perf tool: add show_feature_header to perf_tool David Carrillo-Cisneros
` (3 subsequent siblings)
15 siblings, 0 replies; 27+ messages in thread
From: David Carrillo-Cisneros @ 2017-06-06 7:07 UTC (permalink / raw)
To: linux-kernel
Cc: Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo,
Alexander Shishkin, Andi Kleen, Simon Que, Wang Nan, Jiri Olsa,
He Kuang, Masami Hiramatsu, Stephane Eranian, Paul Turner,
David Carrillo-Cisneros
There are three FEAT_OP* macros:
- FEAT_OPA: for features without process record.
- FEAT_OPP: for features with process record.
- FEAT_OPF: like FEAT_OPP but to show only if show_full_info flags
is set.
To add pipe-mode headers we need yet another variation of the macros
(one to specify whether a feature generates an auxiliar record).
Instead, we redefine macros so that:
- show_full_info is specified as an argument (to remove the
FEAT_OPF variation) and,
- it always sets "process" handler (to remove the FEAT_OPA variation).
Individual process handlers can be NULLed individually.
This allows to define two variations only:
- FEAT_OPR: synthesizes auxiliar event record.
- FEAT_OPN: doesn't synthesize an auxiliar event record.
Signed-off-by: David Carrillo-Cisneros <davidcc@google.com>
---
| 72 +++++++++++++++++++++++++++++-------------------
1 file changed, 44 insertions(+), 28 deletions(-)
--git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 109675b35fab..4a6108d968eb 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -11,6 +11,7 @@
#include <linux/list.h>
#include <linux/kernel.h>
#include <linux/bitops.h>
+#include <linux/stringify.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/utsname.h>
@@ -2129,42 +2130,57 @@ struct feature_ops {
int (*process)(struct feat_fd *ff, void *data);
const char *name;
bool full_only;
+ bool synthesize;
};
-#define FEAT_OPA(n, func) \
- [n] = { .name = #n, .write = write_##func, .print = print_##func }
-#define FEAT_OPP(n, func) \
- [n] = { .name = #n, .write = write_##func, .print = print_##func, \
- .process = process_##func }
-#define FEAT_OPF(n, func) \
- [n] = { .name = #n, .write = write_##func, .print = print_##func, \
- .process = process_##func, .full_only = true }
+#define FEAT_OPR(n, func, __full_only) \
+ [HEADER_##n] = { \
+ .name = __stringify(n), \
+ .write = write_##func, \
+ .print = print_##func, \
+ .full_only = __full_only, \
+ .process = process_##func, \
+ .synthesize = true \
+ }
+
+#define FEAT_OPN(n, func, __full_only) \
+ [HEADER_##n] = { \
+ .name = __stringify(n), \
+ .write = write_##func, \
+ .print = print_##func, \
+ .full_only = __full_only, \
+ .process = process_##func \
+ }
/* feature_ops not implemented: */
#define print_tracing_data NULL
#define print_build_id NULL
+#define process_branch_stack NULL
+#define process_stat NULL
+
+
static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
- FEAT_OPP(HEADER_TRACING_DATA, tracing_data),
- FEAT_OPP(HEADER_BUILD_ID, build_id),
- FEAT_OPP(HEADER_HOSTNAME, hostname),
- FEAT_OPP(HEADER_OSRELEASE, osrelease),
- FEAT_OPP(HEADER_VERSION, version),
- FEAT_OPP(HEADER_ARCH, arch),
- FEAT_OPP(HEADER_NRCPUS, nrcpus),
- FEAT_OPP(HEADER_CPUDESC, cpudesc),
- FEAT_OPP(HEADER_CPUID, cpuid),
- FEAT_OPP(HEADER_TOTAL_MEM, total_mem),
- FEAT_OPP(HEADER_EVENT_DESC, event_desc),
- FEAT_OPP(HEADER_CMDLINE, cmdline),
- FEAT_OPF(HEADER_CPU_TOPOLOGY, cpu_topology),
- FEAT_OPF(HEADER_NUMA_TOPOLOGY, numa_topology),
- FEAT_OPA(HEADER_BRANCH_STACK, branch_stack),
- FEAT_OPP(HEADER_PMU_MAPPINGS, pmu_mappings),
- FEAT_OPP(HEADER_GROUP_DESC, group_desc),
- FEAT_OPP(HEADER_AUXTRACE, auxtrace),
- FEAT_OPA(HEADER_STAT, stat),
- FEAT_OPF(HEADER_CACHE, cache),
+ FEAT_OPN(TRACING_DATA, tracing_data, false),
+ FEAT_OPN(BUILD_ID, build_id, false),
+ FEAT_OPR(HOSTNAME, hostname, false),
+ FEAT_OPR(OSRELEASE, osrelease, false),
+ FEAT_OPR(VERSION, version, false),
+ FEAT_OPR(ARCH, arch, false),
+ FEAT_OPR(NRCPUS, nrcpus, false),
+ FEAT_OPR(CPUDESC, cpudesc, false),
+ FEAT_OPR(CPUID, cpuid, false),
+ FEAT_OPR(TOTAL_MEM, total_mem, false),
+ FEAT_OPR(EVENT_DESC, event_desc, false),
+ FEAT_OPR(CMDLINE, cmdline, false),
+ FEAT_OPR(CPU_TOPOLOGY, cpu_topology, true),
+ FEAT_OPR(NUMA_TOPOLOGY, numa_topology, true),
+ FEAT_OPN(BRANCH_STACK, branch_stack, false),
+ FEAT_OPR(PMU_MAPPINGS, pmu_mappings, false),
+ FEAT_OPN(GROUP_DESC, group_desc, false),
+ FEAT_OPN(AUXTRACE, auxtrace, false),
+ FEAT_OPN(STAT, stat, false),
+ FEAT_OPN(CACHE, cache, true),
};
struct header_print_data {
--
2.13.1.508.gb3defc5cc-goog
^ permalink raw reply related [flat|nested] 27+ messages in thread* [PATCH v3 13/15] perf tool: add show_feature_header to perf_tool
2017-06-06 7:07 [PATCH v3 00/15] perf tool: add meta-data header support for pipe-mode David Carrillo-Cisneros
` (11 preceding siblings ...)
2017-06-06 7:07 ` [PATCH v3 12/15] perf header: change FEAT_OP* macros David Carrillo-Cisneros
@ 2017-06-06 7:07 ` David Carrillo-Cisneros
2017-06-06 7:07 ` [PATCH v3 14/15] perf tools: add feature header record to pipe-mode David Carrillo-Cisneros
` (2 subsequent siblings)
15 siblings, 0 replies; 27+ messages in thread
From: David Carrillo-Cisneros @ 2017-06-06 7:07 UTC (permalink / raw)
To: linux-kernel
Cc: Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo,
Alexander Shishkin, Andi Kleen, Simon Que, Wang Nan, Jiri Olsa,
He Kuang, Masami Hiramatsu, Stephane Eranian, Paul Turner,
David Carrillo-Cisneros
Add show_feat_hdr to control level of printed information
of feature headers.
Signed-off-by: David Carrillo-Cisneros <davidcc@google.com>
---
tools/perf/builtin-report.c | 11 ++++++++---
tools/perf/builtin-script.c | 3 +++
tools/perf/util/tool.h | 7 +++++++
3 files changed, 18 insertions(+), 3 deletions(-)
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 22478ff2b706..7620d708c78b 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -985,9 +985,14 @@ int cmd_report(int argc, const char **argv)
perf_hpp_list.need_collapse = true;
}
- /* Force tty output for header output and per-thread stat. */
- if (report.header || report.header_only || report.show_threads)
- use_browser = 0;
+ if (report.header || report.header_only) {
+ report.tool.show_feat_hdr = SHOW_FEAT_HEADER;
+ /* Force tty output for header output and per-thread stat. */
+ if (report.show_threads)
+ use_browser = 0;
+ }
+ if (report.show_full_info)
+ report.tool.show_feat_hdr = SHOW_FEAT_HEADER_FULL_INFO;
if (strcmp(input_name, "-") != 0)
setup_browser(true);
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index d05aec491cff..0934d0885614 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -2684,10 +2684,13 @@ int cmd_script(int argc, const char **argv)
return -1;
if (header || header_only) {
+ script.tool.show_feat_hdr = SHOW_FEAT_HEADER;
perf_session__fprintf_info(session, stdout, show_full_info);
if (header_only)
goto out_delete;
}
+ if (show_full_info)
+ script.tool.show_feat_hdr = SHOW_FEAT_HEADER_FULL_INFO;
if (symbol__init(&session->header.env) < 0)
goto out_delete;
diff --git a/tools/perf/util/tool.h b/tools/perf/util/tool.h
index 829471a1c6d7..baeca808dfda 100644
--- a/tools/perf/util/tool.h
+++ b/tools/perf/util/tool.h
@@ -34,6 +34,12 @@ typedef int (*event_oe)(struct perf_tool *tool, union perf_event *event,
typedef s64 (*event_op3)(struct perf_tool *tool, union perf_event *event,
struct perf_session *session);
+enum show_feature_header {
+ SHOW_FEAT_NO_HEADER = 0,
+ SHOW_FEAT_HEADER,
+ SHOW_FEAT_HEADER_FULL_INFO,
+};
+
struct perf_tool {
event_sample sample,
read;
@@ -68,6 +74,7 @@ struct perf_tool {
bool ordered_events;
bool ordering_requires_timestamps;
bool namespace_events;
+ enum show_feature_header show_feat_hdr;
};
#endif /* __PERF_TOOL_H */
--
2.13.1.508.gb3defc5cc-goog
^ permalink raw reply related [flat|nested] 27+ messages in thread* [PATCH v3 14/15] perf tools: add feature header record to pipe-mode
2017-06-06 7:07 [PATCH v3 00/15] perf tool: add meta-data header support for pipe-mode David Carrillo-Cisneros
` (12 preceding siblings ...)
2017-06-06 7:07 ` [PATCH v3 13/15] perf tool: add show_feature_header to perf_tool David Carrillo-Cisneros
@ 2017-06-06 7:07 ` David Carrillo-Cisneros
2017-06-06 7:07 ` [PATCH v3 15/15] perf header: add event desc to pipe-mode header David Carrillo-Cisneros
2017-06-06 12:35 ` [PATCH v3 00/15] perf tool: add meta-data header support for pipe-mode Jiri Olsa
15 siblings, 0 replies; 27+ messages in thread
From: David Carrillo-Cisneros @ 2017-06-06 7:07 UTC (permalink / raw)
To: linux-kernel
Cc: Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo,
Alexander Shishkin, Andi Kleen, Simon Que, Wang Nan, Jiri Olsa,
He Kuang, Masami Hiramatsu, Stephane Eranian, Paul Turner,
David Carrillo-Cisneros
Add header record types to pipe-mode, reusing the functions
used in file-mode and leveraging the new struct feat_fd.
Add the perf_event__synthesize_feature event call back to
process the new header records.
Before this patch:
$ perf record -o - -e cycles sleep 1 | perf report --stdio --header
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.000 MB - ]
...
After this patch:
$ perf record -o - -e cycles sleep 1 | perf report --stdio --header
# ========
# captured on: Mon May 22 16:33:43 2017
# ========
#
# hostname : my_hostname
# os release : 4.11.0-dbx-up_perf
# perf version : 4.11.rc6.g6277c80
# arch : x86_64
# nrcpus online : 72
# nrcpus avail : 72
# cpudesc : Intel(R) Xeon(R) CPU E5-2696 v3 @ 2.30GHz
# cpuid : GenuineIntel,6,63,2
# total memory : 263457192 kB
# cmdline : /root/perf record -o - -e cycles -c 100000 sleep 1
# HEADER_CPU_TOPOLOGY info available, use -I to display
# HEADER_NUMA_TOPOLOGY info available, use -I to display
# pmu mappings: intel_bts = 6, uncore_imc_4 = 22, uncore_sbox_1 = 47, uncore_cbox_5 = 33, uncore_ha_0 = 16, uncore_cbox
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.000 MB - ]
...
Support added for the subcommands: report, inject, annotate and script.
Signed-off-by: David Carrillo-Cisneros <davidcc@google.com>
---
tools/perf/Documentation/perf.data-file-format.txt | 10 ++-
tools/perf/builtin-annotate.c | 1 +
tools/perf/builtin-inject.c | 1 +
tools/perf/builtin-record.c | 7 ++
tools/perf/builtin-report.c | 1 +
tools/perf/builtin-script.c | 1 +
tools/perf/util/event.c | 1 +
tools/perf/util/event.h | 8 ++
| 97 ++++++++++++++++++++++
| 9 ++
tools/perf/util/session.c | 4 +
tools/perf/util/tool.h | 3 +-
12 files changed, 140 insertions(+), 3 deletions(-)
diff --git a/tools/perf/Documentation/perf.data-file-format.txt b/tools/perf/Documentation/perf.data-file-format.txt
index de8b39dda7b8..e90c59c6d815 100644
--- a/tools/perf/Documentation/perf.data-file-format.txt
+++ b/tools/perf/Documentation/perf.data-file-format.txt
@@ -398,6 +398,11 @@ struct auxtrace_error_event {
char msg[MAX_AUXTRACE_ERROR_MSG];
};
+ PERF_RECORD_HEADER_FEATURE = 80,
+
+Describes a header feature. These are records used in pipe-mode that
+contain information that otherwise would be in perf.data file's header.
+
Event types
Define the event attributes with their IDs.
@@ -422,8 +427,9 @@ struct perf_pipe_file_header {
};
The information about attrs, data, and event_types is instead in the
-synthesized events PERF_RECORD_ATTR, PERF_RECORD_HEADER_TRACING_DATA and
-PERF_RECORD_HEADER_EVENT_TYPE that are generated by perf record in pipe-mode.
+synthesized events PERF_RECORD_ATTR, PERF_RECORD_HEADER_TRACING_DATA,
+PERF_RECORD_HEADER_EVENT_TYPE, and PERF_RECORD_HEADER_FEATURE
+that are generated by perf record in pipe-mode.
References:
diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index ce44edc30c71..ffe28002dc4f 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -398,6 +398,7 @@ int cmd_annotate(int argc, const char **argv)
.attr = perf_event__process_attr,
.build_id = perf_event__process_build_id,
.tracing_data = perf_event__process_tracing_data,
+ .feature = perf_event__process_feature,
.ordered_events = true,
.ordering_requires_timestamps = true,
},
diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c
index ea8db38eedd1..2b8032908fb2 100644
--- a/tools/perf/builtin-inject.c
+++ b/tools/perf/builtin-inject.c
@@ -770,6 +770,7 @@ int cmd_inject(int argc, const char **argv)
.finished_round = perf_event__repipe_oe_synth,
.build_id = perf_event__repipe_op2_synth,
.id_index = perf_event__repipe_op2_synth,
+ .feature = perf_event__repipe_op2_synth,
},
.input_name = "-",
.samples = LIST_HEAD_INIT(inject.samples),
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index ee7d0a82ccd0..a1bcb72b4195 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -799,6 +799,13 @@ static int record__synthesize(struct record *rec, bool tail)
return 0;
if (file->is_pipe) {
+ err = perf_event__synthesize_features(
+ tool, session, rec->evlist, process_synthesized_event);
+ if (err < 0) {
+ pr_err("Couldn't synthesize features.\n");
+ return err;
+ }
+
err = perf_event__synthesize_attrs(tool, session,
process_synthesized_event);
if (err < 0) {
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 7620d708c78b..33881ca7dde6 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -718,6 +718,7 @@ int cmd_report(int argc, const char **argv)
.id_index = perf_event__process_id_index,
.auxtrace_info = perf_event__process_auxtrace_info,
.auxtrace = perf_event__process_auxtrace,
+ .feature = perf_event__process_feature,
.ordered_events = true,
.ordering_requires_timestamps = true,
},
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 0934d0885614..3f97eeba8105 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -2397,6 +2397,7 @@ int cmd_script(int argc, const char **argv)
.attr = process_attr,
.event_update = perf_event__process_event_update,
.tracing_data = perf_event__process_tracing_data,
+ .feature = perf_event__process_feature,
.build_id = perf_event__process_build_id,
.id_index = perf_event__process_id_index,
.auxtrace_info = perf_event__process_auxtrace_info,
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index dc5c3bb69d73..1c905ba3641b 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -57,6 +57,7 @@ static const char *perf_event__names[] = {
[PERF_RECORD_STAT_ROUND] = "STAT_ROUND",
[PERF_RECORD_EVENT_UPDATE] = "EVENT_UPDATE",
[PERF_RECORD_TIME_CONV] = "TIME_CONV",
+ [PERF_RECORD_HEADER_FEATURE] = "FEATURE",
};
static const char *perf_ns__names[] = {
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 7c3fa1c8cbcd..2394aca1ccf4 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -244,6 +244,7 @@ enum perf_user_event_type { /* above any possible kernel type */
PERF_RECORD_STAT_ROUND = 77,
PERF_RECORD_EVENT_UPDATE = 78,
PERF_RECORD_TIME_CONV = 79,
+ PERF_RECORD_HEADER_FEATURE = 80,
PERF_RECORD_HEADER_MAX
};
@@ -488,6 +489,12 @@ struct time_conv_event {
u64 time_zero;
};
+struct feature_event {
+ struct perf_event_header header;
+ u64 feat_id;
+ char data[];
+};
+
union perf_event {
struct perf_event_header header;
struct mmap_event mmap;
@@ -518,6 +525,7 @@ union perf_event {
struct stat_event stat;
struct stat_round_event stat_round;
struct time_conv_event time_conv;
+ struct feature_event feat;
};
void perf_event__print_totals(void);
--git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 4a6108d968eb..6c1963e5bf10 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -34,6 +34,7 @@
#include "data.h"
#include <api/fs/fs.h>
#include "asm/bug.h"
+#include "tool.h"
#include "sane_ctype.h"
@@ -2973,6 +2974,102 @@ int perf_event__synthesize_attr(struct perf_tool *tool,
return err;
}
+int perf_event__synthesize_features(struct perf_tool *tool,
+ struct perf_session *session,
+ struct perf_evlist *evlist,
+ perf_event__handler_t process)
+{
+ struct perf_header *header = &session->header;
+ struct feat_fd ff;
+ struct feature_event *fe;
+ size_t sz, sz_hdr;
+ int feat, ret;
+
+ sz_hdr = sizeof(fe->header);
+ sz = sizeof(union perf_event);
+ /* get a nice alignment */
+ sz = PERF_ALIGN(sz, page_size);
+
+ memset(&ff, 0, sizeof(ff));
+
+ ff.buf = malloc(sz);
+ if (!ff.buf)
+ return -ENOMEM;
+
+ ff.size = sz - sz_hdr;
+
+ for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) {
+ if (!feat_ops[feat].synthesize) {
+ pr_debug("No record header feature for header :%d\n", feat);
+ continue;
+ }
+
+ ff.offset = sizeof(*fe);
+
+ ret = feat_ops[feat].write(&ff, evlist);
+ if (ret || ff.offset <= (ssize_t)sizeof(*fe)) {
+ pr_debug("Error writing feature\n");
+ continue;
+ }
+
+ /* ff.buf may have changed due to realloc in do_write() */
+ fe = ff.buf;
+ memset(fe, 0, sizeof(*fe));
+
+ fe->feat_id = feat;
+ fe->header.type = PERF_RECORD_HEADER_FEATURE;
+ fe->header.size = ff.offset;
+
+ ret = process(tool, ff.buf, NULL, NULL);
+ if (ret)
+ return ret;
+ }
+ free(ff.buf);
+ return 0;
+}
+
+int perf_event__process_feature(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_session *session __maybe_unused)
+{
+ struct feat_fd fd = { .fd = 0 };
+ struct feature_event *fe = (struct feature_event *)event;
+ int type = fe->header.type;
+ u64 feat = fe->feat_id;
+
+ if (type < 0 || type >= PERF_RECORD_HEADER_MAX) {
+ pr_warning("invalid record type %d in pipe-mode\n", type);
+ return 0;
+ }
+ if (feat == HEADER_RESERVED || feat > HEADER_LAST_FEATURE) {
+ pr_warning("invalid record type %d in pipe-mode\n", type);
+ return -1;
+ }
+
+ if (!feat_ops[feat].process)
+ return 0;
+
+ fd.buf = (void *)fe->data;
+ fd.size = event->header.size - sizeof(event->header);
+ fd.ph = &session->header;
+
+ if (feat_ops[feat].process(&fd, NULL))
+ return -1;
+
+ if (!feat_ops[feat].print || !tool->show_feat_hdr)
+ return 0;
+
+ if (!feat_ops[feat].full_only ||
+ tool->show_feat_hdr >= SHOW_FEAT_HEADER_FULL_INFO) {
+ feat_ops[feat].print(&fd, stdout);
+ } else {
+ fprintf(stdout, "# %s info available, use -I to display\n",
+ feat_ops[feat].name);
+ }
+
+ return 0;
+}
+
static struct event_update_event *
event_update_event__new(size_t size, u64 type, u64 id)
{
--git a/tools/perf/util/header.h b/tools/perf/util/header.h
index 9d8dcd5eb727..f7a16ee527b8 100644
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -101,6 +101,15 @@ int perf_header__process_sections(struct perf_header *header, int fd,
int perf_header__fprintf_info(struct perf_session *s, FILE *fp, bool full);
+int perf_event__synthesize_features(struct perf_tool *tool,
+ struct perf_session *session,
+ struct perf_evlist *evlist,
+ perf_event__handler_t process);
+
+int perf_event__process_feature(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_session *session);
+
int perf_event__synthesize_attr(struct perf_tool *tool,
struct perf_event_attr *attr, u32 ids, u64 *id,
perf_event__handler_t process);
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 7dc1096264c5..25dbac473186 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -428,6 +428,8 @@ void perf_tool__fill_defaults(struct perf_tool *tool)
tool->stat_round = process_stat_round_stub;
if (tool->time_conv == NULL)
tool->time_conv = process_event_op2_stub;
+ if (tool->feature == NULL)
+ tool->feature = process_event_op2_stub;
}
static void swap_sample_id_all(union perf_event *event, void *data)
@@ -1371,6 +1373,8 @@ static s64 perf_session__process_user_event(struct perf_session *session,
case PERF_RECORD_TIME_CONV:
session->time_conv = event->time_conv;
return tool->time_conv(tool, event, session);
+ case PERF_RECORD_HEADER_FEATURE:
+ return tool->feature(tool, event, session);
default:
return -EINVAL;
}
diff --git a/tools/perf/util/tool.h b/tools/perf/util/tool.h
index baeca808dfda..d549e50db397 100644
--- a/tools/perf/util/tool.h
+++ b/tools/perf/util/tool.h
@@ -69,7 +69,8 @@ struct perf_tool {
cpu_map,
stat_config,
stat,
- stat_round;
+ stat_round,
+ feature;
event_op3 auxtrace;
bool ordered_events;
bool ordering_requires_timestamps;
--
2.13.1.508.gb3defc5cc-goog
^ permalink raw reply related [flat|nested] 27+ messages in thread* [PATCH v3 15/15] perf header: add event desc to pipe-mode header
2017-06-06 7:07 [PATCH v3 00/15] perf tool: add meta-data header support for pipe-mode David Carrillo-Cisneros
` (13 preceding siblings ...)
2017-06-06 7:07 ` [PATCH v3 14/15] perf tools: add feature header record to pipe-mode David Carrillo-Cisneros
@ 2017-06-06 7:07 ` David Carrillo-Cisneros
2017-06-08 11:54 ` Jiri Olsa
2017-06-06 12:35 ` [PATCH v3 00/15] perf tool: add meta-data header support for pipe-mode Jiri Olsa
15 siblings, 1 reply; 27+ messages in thread
From: David Carrillo-Cisneros @ 2017-06-06 7:07 UTC (permalink / raw)
To: linux-kernel
Cc: Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo,
Alexander Shishkin, Andi Kleen, Simon Que, Wang Nan, Jiri Olsa,
He Kuang, Masami Hiramatsu, Stephane Eranian, Paul Turner,
David Carrillo-Cisneros
Add event descriptor to perf header output in pipe-mode.
After this patch:
$ perf record -e cycles sleep 1 | perf report --header
# ========
# captured on: Mon Jun 5 22:52:13 2017
# ========
#
# hostname : lphh20
# os release : 4.3.5-smp-801.43.0.0
# perf version : 4.12.rc2.g439987
# arch : x86_64
# nrcpus online : 72
# nrcpus avail : 72
# cpudesc : Intel(R) Xeon(R) CPU E5-2696 v3 @ 2.30GHz
# cpuid : GenuineIntel,6,63,2
# total memory : 264134144 kB
# cmdline : /root/perf record -e cycles sleep 1
# event : name = cycles, , size = 112, { sample_period, sample_freq } = 4000, sample_type = IP|TID|TIME|PERIOD, disabled = 1, inherit = 1, mmap = 1, comm = 1, freq = 1, enable_on_exec = 1, task = 1, sample_id_all = 1, exclude_guest = 1, mmap2 = 1, comm_exec = 1
# CPU_TOPOLOGY info available, use -I to display
# NUMA_TOPOLOGY info available, use -I to display
# pmu mappings: intel_bts = 6, cpu = 4, msr = 49, uncore_cbox_10 = 36, uncore_cbox_11 = 37, uncore_cbox_12 = 38, uncore_cbox_13 = 39, uncore_cbox_14 = 40, uncore_cbox_15 = 41, uncore_cbox_16 = 42, uncore_cbox_17 = 43, software = 1, power = 7, uncore_irp = 24, uncore_pcu = 48, tracepoint = 2, uncore_imc_0 = 16, uncore_imc_1 = 17, uncore_imc_2 = 18, uncore_imc_3 = 19, uncore_imc_4 = 20, uncore_imc_5 = 21, uncore_imc_6 = 22, uncore_imc_7 = 23, uncore_qpi_0 = 8, uncore_qpi_1 = 9, uncore_cbox_0 = 26, uncore_cbox_1 = 27, uncore_cbox_2 = 28, uncore_cbox_3 = 29, uncore_cbox_4 = 30, uncore_cbox_5 = 31, uncore_cbox_6 = 32, uncore_cbox_7 = 33, uncore_cbox_8 = 34, uncore_cbox_9 = 35, uncore_r2pcie = 13, uncore_r3qpi_0 = 10, uncore_r3qpi_1 = 11, uncore_r3qpi_2 = 12, uncore_sbox_0 = 44, uncore_sbox_1 = 45, uncore_sbox_2 = 46, uncore_sbox_3 = 47, breakpoint = 5, uncore_ha_0 = 14, uncore_ha_1 = 15, uncore_ubox = 25
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.000 MB (null) ]
Prior to this patch, event was not printed.
Signed-off-by: David Carrillo-Cisneros <davidcc@google.com>
---
| 19 +++++++++++++++++--
1 file changed, 17 insertions(+), 2 deletions(-)
--git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 6c1963e5bf10..c91acd5b0838 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -66,6 +66,7 @@ struct feat_fd {
void *buf; /* Either buf != NULL or fd >= 0 */
ssize_t offset;
size_t size;
+ struct perf_evsel *events;
};
void perf_header__set_feat(struct perf_header *header, int feat)
@@ -1353,10 +1354,15 @@ static int __desc_attr__fprintf(FILE *fp, const char *name, const char *val,
static void print_event_desc(struct feat_fd *ff, FILE *fp)
{
- struct perf_evsel *evsel, *events = read_event_desc(ff);
+ struct perf_evsel *evsel, *events;
u32 j;
u64 *id;
+ if (ff->events)
+ events = ff->events;
+ else
+ events = read_event_desc(ff);
+
if (!events) {
fprintf(fp, "# event desc: not available or unable to read\n");
return;
@@ -1381,6 +1387,7 @@ static void print_event_desc(struct feat_fd *ff, FILE *fp)
}
free_event_desc(events);
+ ff->events = NULL;
}
static void print_total_mem(struct feat_fd *ff, FILE *fp)
@@ -1743,10 +1750,18 @@ process_event_desc(struct feat_fd *ff, void *data __maybe_unused)
return 0;
session = container_of(ff->ph, struct perf_session, header);
+
+ if (session->file->is_pipe) {
+ /* Save events for reading later by print_event_desc,
+ * since they can't be read again in pipe mode. */
+ ff->events = events;
+ }
+
for (evsel = events; evsel->attr.size; evsel++)
perf_evlist__set_event_name(session->evlist, evsel);
- free_event_desc(events);
+ if (!session->file->is_pipe)
+ free_event_desc(events);
return 0;
}
--
2.13.1.508.gb3defc5cc-goog
^ permalink raw reply related [flat|nested] 27+ messages in thread* Re: [PATCH v3 15/15] perf header: add event desc to pipe-mode header
2017-06-06 7:07 ` [PATCH v3 15/15] perf header: add event desc to pipe-mode header David Carrillo-Cisneros
@ 2017-06-08 11:54 ` Jiri Olsa
2017-06-13 4:23 ` David Carrillo-Cisneros
0 siblings, 1 reply; 27+ messages in thread
From: Jiri Olsa @ 2017-06-08 11:54 UTC (permalink / raw)
To: David Carrillo-Cisneros
Cc: linux-kernel, Peter Zijlstra, Ingo Molnar,
Arnaldo Carvalho de Melo, Alexander Shishkin, Andi Kleen,
Simon Que, Wang Nan, Jiri Olsa, He Kuang, Masami Hiramatsu,
Stephane Eranian, Paul Turner
On Tue, Jun 06, 2017 at 12:07:22AM -0700, David Carrillo-Cisneros wrote:
SNIP
> diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
> index 6c1963e5bf10..c91acd5b0838 100644
> --- a/tools/perf/util/header.c
> +++ b/tools/perf/util/header.c
> @@ -66,6 +66,7 @@ struct feat_fd {
> void *buf; /* Either buf != NULL or fd >= 0 */
> ssize_t offset;
> size_t size;
> + struct perf_evsel *events;
> };
>
> void perf_header__set_feat(struct perf_header *header, int feat)
> @@ -1353,10 +1354,15 @@ static int __desc_attr__fprintf(FILE *fp, const char *name, const char *val,
>
> static void print_event_desc(struct feat_fd *ff, FILE *fp)
> {
> - struct perf_evsel *evsel, *events = read_event_desc(ff);
> + struct perf_evsel *evsel, *events;
> u32 j;
> u64 *id;
>
> + if (ff->events)
> + events = ff->events;
> + else
> + events = read_event_desc(ff);
can you read from ff at this point in print callback?
jirka
^ permalink raw reply [flat|nested] 27+ messages in thread* Re: [PATCH v3 15/15] perf header: add event desc to pipe-mode header
2017-06-08 11:54 ` Jiri Olsa
@ 2017-06-13 4:23 ` David Carrillo-Cisneros
0 siblings, 0 replies; 27+ messages in thread
From: David Carrillo-Cisneros @ 2017-06-13 4:23 UTC (permalink / raw)
To: Jiri Olsa
Cc: linux-kernel, Peter Zijlstra, Ingo Molnar,
Arnaldo Carvalho de Melo, Alexander Shishkin, Andi Kleen,
Simon Que, Wang Nan, Jiri Olsa, He Kuang, Masami Hiramatsu,
Stephane Eranian, Paul Turner
On Thu, Jun 8, 2017 at 4:54 AM, Jiri Olsa <jolsa@redhat.com> wrote:
> On Tue, Jun 06, 2017 at 12:07:22AM -0700, David Carrillo-Cisneros wrote:
>
> SNIP
>
>> diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
>> index 6c1963e5bf10..c91acd5b0838 100644
>> --- a/tools/perf/util/header.c
>> +++ b/tools/perf/util/header.c
>> @@ -66,6 +66,7 @@ struct feat_fd {
>> void *buf; /* Either buf != NULL or fd >= 0 */
>> ssize_t offset;
>> size_t size;
>> + struct perf_evsel *events;
>> };
>>
>> void perf_header__set_feat(struct perf_header *header, int feat)
>> @@ -1353,10 +1354,15 @@ static int __desc_attr__fprintf(FILE *fp, const char *name, const char *val,
>>
>> static void print_event_desc(struct feat_fd *ff, FILE *fp)
>> {
>> - struct perf_evsel *evsel, *events = read_event_desc(ff);
>> + struct perf_evsel *evsel, *events;
>> u32 j;
>> u64 *id;
>>
>> + if (ff->events)
>> + events = ff->events;
>> + else
>> + events = read_event_desc(ff);
>
> can you read from ff at this point in print callback?
Yes, ->print it's always called after ->process in
perf_event__synthesize_features. So process_event_desc (that in
pipe-mode sets ff->events) is called before this print_event_desc.
>
> jirka
^ permalink raw reply [flat|nested] 27+ messages in thread
* Re: [PATCH v3 00/15] perf tool: add meta-data header support for pipe-mode
2017-06-06 7:07 [PATCH v3 00/15] perf tool: add meta-data header support for pipe-mode David Carrillo-Cisneros
` (14 preceding siblings ...)
2017-06-06 7:07 ` [PATCH v3 15/15] perf header: add event desc to pipe-mode header David Carrillo-Cisneros
@ 2017-06-06 12:35 ` Jiri Olsa
2017-06-06 18:15 ` David Carrillo-Cisneros
15 siblings, 1 reply; 27+ messages in thread
From: Jiri Olsa @ 2017-06-06 12:35 UTC (permalink / raw)
To: David Carrillo-Cisneros
Cc: linux-kernel, Peter Zijlstra, Ingo Molnar,
Arnaldo Carvalho de Melo, Alexander Shishkin, Andi Kleen,
Simon Que, Wang Nan, Jiri Olsa, He Kuang, Masami Hiramatsu,
Stephane Eranian, Paul Turner
On Tue, Jun 06, 2017 at 12:07:07AM -0700, David Carrillo-Cisneros wrote:
> v3: - Fix header output for event aux record.
> - Uniformize variable naming and other cleanup.
> - Other fixes suggested by Jiri and Nahmyung.
what tree did you base your changes on?
I'm getting git am fail on any tree I try it on:
[jolsa@krava perf]$ git am /tmp/d
Applying: perf header: encapsulate read and swap
Applying: perf header: add PROCESS_STR_FUN macro
Applying: perf header: fail on write_padded error
Applying: perf util: add const modifier to buf in "writen" function
Applying: perf header: revamp do_write
Applying: perf header: add struct feat_fd for write
Applying: perf header: use struct feat_fd for print
Applying: perf header: use struct feat_fd to process header records
Applying: perf header: use struct feat_fd in read header records
Applying: perf header: make write_pmu_mappings pipe-mode friendly
Applying: perf header: add a buffer to struct feat_fd
Applying: perf header: change FEAT_OP* macros
Applying: perf tool: add show_feature_header to perf_tool
Applying: perf tools: add feature header record to pipe-mode
error: patch failed: tools/perf/builtin-annotate.c:398
error: tools/perf/builtin-annotate.c: patch does not apply
Patch failed at 0014 perf tools: add feature header record to pipe-mode
The copy of the patch that failed is found in: .git/rebase-apply/patch
When you have resolved this problem, run "git am --continue".
fyi acme's perf/core is the prefered one ;-)
thanks,
jirka
^ permalink raw reply [flat|nested] 27+ messages in thread* Re: [PATCH v3 00/15] perf tool: add meta-data header support for pipe-mode
2017-06-06 12:35 ` [PATCH v3 00/15] perf tool: add meta-data header support for pipe-mode Jiri Olsa
@ 2017-06-06 18:15 ` David Carrillo-Cisneros
2017-06-07 11:19 ` Jiri Olsa
0 siblings, 1 reply; 27+ messages in thread
From: David Carrillo-Cisneros @ 2017-06-06 18:15 UTC (permalink / raw)
To: Jiri Olsa
Cc: linux-kernel, Peter Zijlstra, Ingo Molnar,
Arnaldo Carvalho de Melo, Alexander Shishkin, Andi Kleen,
Simon Que, Wang Nan, Jiri Olsa, He Kuang, Masami Hiramatsu,
Stephane Eranian, Paul Turner
On Tue, Jun 6, 2017 at 5:35 AM, Jiri Olsa <jolsa@redhat.com> wrote:
> On Tue, Jun 06, 2017 at 12:07:07AM -0700, David Carrillo-Cisneros wrote:
>> v3: - Fix header output for event aux record.
>> - Uniformize variable naming and other cleanup.
>> - Other fixes suggested by Jiri and Nahmyung.
>
> what tree did you base your changes on?
> I'm getting git am fail on any tree I try it on:
>
> [jolsa@krava perf]$ git am /tmp/d
> Applying: perf header: encapsulate read and swap
> Applying: perf header: add PROCESS_STR_FUN macro
> Applying: perf header: fail on write_padded error
> Applying: perf util: add const modifier to buf in "writen" function
> Applying: perf header: revamp do_write
> Applying: perf header: add struct feat_fd for write
> Applying: perf header: use struct feat_fd for print
> Applying: perf header: use struct feat_fd to process header records
> Applying: perf header: use struct feat_fd in read header records
> Applying: perf header: make write_pmu_mappings pipe-mode friendly
> Applying: perf header: add a buffer to struct feat_fd
> Applying: perf header: change FEAT_OP* macros
> Applying: perf tool: add show_feature_header to perf_tool
> Applying: perf tools: add feature header record to pipe-mode
> error: patch failed: tools/perf/builtin-annotate.c:398
> error: tools/perf/builtin-annotate.c: patch does not apply
> Patch failed at 0014 perf tools: add feature header record to pipe-mode
> The copy of the patch that failed is found in: .git/rebase-apply/patch
> When you have resolved this problem, run "git am --continue".
>
> fyi acme's perf/core is the prefered one ;-)
I used tip/perf/core . Will rebase to acme's. Thank you for testing it.
David
>
> thanks,
> jirka
^ permalink raw reply [flat|nested] 27+ messages in thread
* Re: [PATCH v3 00/15] perf tool: add meta-data header support for pipe-mode
2017-06-06 18:15 ` David Carrillo-Cisneros
@ 2017-06-07 11:19 ` Jiri Olsa
2017-06-07 15:02 ` David Carrillo-Cisneros
0 siblings, 1 reply; 27+ messages in thread
From: Jiri Olsa @ 2017-06-07 11:19 UTC (permalink / raw)
To: David Carrillo-Cisneros
Cc: linux-kernel, Peter Zijlstra, Ingo Molnar,
Arnaldo Carvalho de Melo, Alexander Shishkin, Andi Kleen,
Simon Que, Wang Nan, Jiri Olsa, He Kuang, Masami Hiramatsu,
Stephane Eranian, Paul Turner
On Tue, Jun 06, 2017 at 11:15:25AM -0700, David Carrillo-Cisneros wrote:
> On Tue, Jun 6, 2017 at 5:35 AM, Jiri Olsa <jolsa@redhat.com> wrote:
> > On Tue, Jun 06, 2017 at 12:07:07AM -0700, David Carrillo-Cisneros wrote:
> >> v3: - Fix header output for event aux record.
> >> - Uniformize variable naming and other cleanup.
> >> - Other fixes suggested by Jiri and Nahmyung.
> >
> > what tree did you base your changes on?
> > I'm getting git am fail on any tree I try it on:
> >
> > [jolsa@krava perf]$ git am /tmp/d
> > Applying: perf header: encapsulate read and swap
> > Applying: perf header: add PROCESS_STR_FUN macro
> > Applying: perf header: fail on write_padded error
> > Applying: perf util: add const modifier to buf in "writen" function
> > Applying: perf header: revamp do_write
> > Applying: perf header: add struct feat_fd for write
> > Applying: perf header: use struct feat_fd for print
> > Applying: perf header: use struct feat_fd to process header records
> > Applying: perf header: use struct feat_fd in read header records
> > Applying: perf header: make write_pmu_mappings pipe-mode friendly
> > Applying: perf header: add a buffer to struct feat_fd
> > Applying: perf header: change FEAT_OP* macros
> > Applying: perf tool: add show_feature_header to perf_tool
> > Applying: perf tools: add feature header record to pipe-mode
> > error: patch failed: tools/perf/builtin-annotate.c:398
> > error: tools/perf/builtin-annotate.c: patch does not apply
> > Patch failed at 0014 perf tools: add feature header record to pipe-mode
> > The copy of the patch that failed is found in: .git/rebase-apply/patch
> > When you have resolved this problem, run "git am --continue".
> >
> > fyi acme's perf/core is the prefered one ;-)
>
> I used tip/perf/core . Will rebase to acme's. Thank you for testing it.
do you have it in some branch somewhere?
thanks,
jirka
^ permalink raw reply [flat|nested] 27+ messages in thread
* Re: [PATCH v3 00/15] perf tool: add meta-data header support for pipe-mode
2017-06-07 11:19 ` Jiri Olsa
@ 2017-06-07 15:02 ` David Carrillo-Cisneros
2017-06-13 4:28 ` David Carrillo-Cisneros
0 siblings, 1 reply; 27+ messages in thread
From: David Carrillo-Cisneros @ 2017-06-07 15:02 UTC (permalink / raw)
To: Jiri Olsa
Cc: linux-kernel, Peter Zijlstra, Ingo Molnar,
Arnaldo Carvalho de Melo, Alexander Shishkin, Andi Kleen,
Simon Que, Wang Nan, Jiri Olsa, He Kuang, Masami Hiramatsu,
Stephane Eranian, Paul Turner
On Wed, Jun 7, 2017 at 4:19 AM, Jiri Olsa <jolsa@redhat.com> wrote:
> On Tue, Jun 06, 2017 at 11:15:25AM -0700, David Carrillo-Cisneros wrote:
>> On Tue, Jun 6, 2017 at 5:35 AM, Jiri Olsa <jolsa@redhat.com> wrote:
>> > On Tue, Jun 06, 2017 at 12:07:07AM -0700, David Carrillo-Cisneros wrote:
>> >> v3: - Fix header output for event aux record.
>> >> - Uniformize variable naming and other cleanup.
>> >> - Other fixes suggested by Jiri and Nahmyung.
>> >
>> > what tree did you base your changes on?
>> > I'm getting git am fail on any tree I try it on:
>> >
>> > [jolsa@krava perf]$ git am /tmp/d
>> > Applying: perf header: encapsulate read and swap
>> > Applying: perf header: add PROCESS_STR_FUN macro
>> > Applying: perf header: fail on write_padded error
>> > Applying: perf util: add const modifier to buf in "writen" function
>> > Applying: perf header: revamp do_write
>> > Applying: perf header: add struct feat_fd for write
>> > Applying: perf header: use struct feat_fd for print
>> > Applying: perf header: use struct feat_fd to process header records
>> > Applying: perf header: use struct feat_fd in read header records
>> > Applying: perf header: make write_pmu_mappings pipe-mode friendly
>> > Applying: perf header: add a buffer to struct feat_fd
>> > Applying: perf header: change FEAT_OP* macros
>> > Applying: perf tool: add show_feature_header to perf_tool
>> > Applying: perf tools: add feature header record to pipe-mode
>> > error: patch failed: tools/perf/builtin-annotate.c:398
>> > error: tools/perf/builtin-annotate.c: patch does not apply
>> > Patch failed at 0014 perf tools: add feature header record to pipe-mode
>> > The copy of the patch that failed is found in: .git/rebase-apply/patch
>> > When you have resolved this problem, run "git am --continue".
>> >
>> > fyi acme's perf/core is the prefered one ;-)
>>
>> I used tip/perf/core . Will rebase to acme's. Thank you for testing it.
>
> do you have it in some branch somewhere?
it's on my github:
https://github.com/ccdavid/linux/tree/toup_june07_pipeheaders_00
already rebased to acme's perf/core.
thanks,
David
^ permalink raw reply [flat|nested] 27+ messages in thread
* Re: [PATCH v3 00/15] perf tool: add meta-data header support for pipe-mode
2017-06-07 15:02 ` David Carrillo-Cisneros
@ 2017-06-13 4:28 ` David Carrillo-Cisneros
0 siblings, 0 replies; 27+ messages in thread
From: David Carrillo-Cisneros @ 2017-06-13 4:28 UTC (permalink / raw)
To: Jiri Olsa
Cc: linux-kernel, Peter Zijlstra, Ingo Molnar,
Arnaldo Carvalho de Melo, Alexander Shishkin, Andi Kleen,
Simon Que, Wang Nan, Jiri Olsa, He Kuang, Masami Hiramatsu,
Stephane Eranian, Paul Turner
On Wed, Jun 7, 2017 at 8:02 AM, David Carrillo-Cisneros
<davidcc@google.com> wrote:
> On Wed, Jun 7, 2017 at 4:19 AM, Jiri Olsa <jolsa@redhat.com> wrote:
>> On Tue, Jun 06, 2017 at 11:15:25AM -0700, David Carrillo-Cisneros wrote:
>>> On Tue, Jun 6, 2017 at 5:35 AM, Jiri Olsa <jolsa@redhat.com> wrote:
>>> > On Tue, Jun 06, 2017 at 12:07:07AM -0700, David Carrillo-Cisneros wrote:
>>> >> v3: - Fix header output for event aux record.
>>> >> - Uniformize variable naming and other cleanup.
>>> >> - Other fixes suggested by Jiri and Nahmyung.
>>> >
>>> > what tree did you base your changes on?
>>> > I'm getting git am fail on any tree I try it on:
>>> >
>>> > [jolsa@krava perf]$ git am /tmp/d
>>> > Applying: perf header: encapsulate read and swap
>>> > Applying: perf header: add PROCESS_STR_FUN macro
>>> > Applying: perf header: fail on write_padded error
>>> > Applying: perf util: add const modifier to buf in "writen" function
>>> > Applying: perf header: revamp do_write
>>> > Applying: perf header: add struct feat_fd for write
>>> > Applying: perf header: use struct feat_fd for print
>>> > Applying: perf header: use struct feat_fd to process header records
>>> > Applying: perf header: use struct feat_fd in read header records
>>> > Applying: perf header: make write_pmu_mappings pipe-mode friendly
>>> > Applying: perf header: add a buffer to struct feat_fd
>>> > Applying: perf header: change FEAT_OP* macros
>>> > Applying: perf tool: add show_feature_header to perf_tool
>>> > Applying: perf tools: add feature header record to pipe-mode
>>> > error: patch failed: tools/perf/builtin-annotate.c:398
>>> > error: tools/perf/builtin-annotate.c: patch does not apply
>>> > Patch failed at 0014 perf tools: add feature header record to pipe-mode
>>> > The copy of the patch that failed is found in: .git/rebase-apply/patch
>>> > When you have resolved this problem, run "git am --continue".
>>> >
>>> > fyi acme's perf/core is the prefered one ;-)
>>>
>>> I used tip/perf/core . Will rebase to acme's. Thank you for testing it.
>>
>> do you have it in some branch somewhere?
>
> it's on my github:
>
> https://github.com/ccdavid/linux/tree/toup_june07_pipeheaders_00
>
> already rebased to acme's perf/core.
Thanks a lot for the review. v4 is in
https://github.com/ccdavid/linux/tree/toup_june12_pipeheaders_00
>
> thanks,
> David
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