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author | Jiri Olsa <jolsa@kernel.org> | 2016-02-15 11:34:35 +0300 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-02-23 18:15:59 +0300 |
commit | ce1e22b08f0728e840614d3d0fc43fd1d6b7f7a2 (patch) | |
tree | 284f4a451e2a6b01751532b02fa8daa1eb8e0ac4 /tools/perf/util | |
parent | acbe613e0c03d59cab21aec3565cdb28c7df98c3 (diff) | |
download | linux-ce1e22b08f0728e840614d3d0fc43fd1d6b7f7a2.tar.xz |
perf mem: Add -e record option
Adding -e option for perf mem record command, to be able to specify
memory event directly.
Get list of available events:
$ perf mem record -e list
ldlat-loads
ldlat-stores
Monitor ldlat-loads:
$ perf mem record -e ldlat-loads true
Committer notes:
Further testing:
# perf mem record -e ldlat-loads true
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.020 MB perf.data (10 samples) ]
# perf evlist
cpu/mem-loads,ldlat=30/P
#
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1455525293-8671-6-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util')
-rw-r--r-- | tools/perf/util/mem-events.c | 47 | ||||
-rw-r--r-- | tools/perf/util/mem-events.h | 3 |
2 files changed, 47 insertions, 3 deletions
diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c index c6ba0a19ec9a..b1507c04b257 100644 --- a/tools/perf/util/mem-events.c +++ b/tools/perf/util/mem-events.c @@ -1,10 +1,51 @@ +#include <stddef.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> #include "mem-events.h" +#include "debug.h" -#define E(n) { .name = n } +#define E(t, n) { .tag = t, .name = n } struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = { - E("cpu/mem-loads,ldlat=30/P"), - E("cpu/mem-stores/P"), + E("ldlat-loads", "cpu/mem-loads,ldlat=30/P"), + E("ldlat-stores", "cpu/mem-stores/P"), }; #undef E + +int perf_mem_events__parse(const char *str) +{ + char *tok, *saveptr = NULL; + bool found = false; + char *buf; + int j; + + /* We need buffer that we know we can write to. */ + buf = malloc(strlen(str) + 1); + if (!buf) + return -ENOMEM; + + strcpy(buf, str); + + tok = strtok_r((char *)buf, ",", &saveptr); + + while (tok) { + for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) { + struct perf_mem_event *e = &perf_mem_events[j]; + + if (strstr(e->tag, tok)) + e->record = found = true; + } + + tok = strtok_r(NULL, ",", &saveptr); + } + + free(buf); + + if (found) + return 0; + + pr_err("failed: event '%s' not found, use '-e list' to get list of available events\n", str); + return -1; +} diff --git a/tools/perf/util/mem-events.h b/tools/perf/util/mem-events.h index c97b21465fa9..2995bae6ac33 100644 --- a/tools/perf/util/mem-events.h +++ b/tools/perf/util/mem-events.h @@ -5,6 +5,7 @@ struct perf_mem_event { bool record; + const char *tag; const char *name; }; @@ -16,4 +17,6 @@ enum { extern struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX]; +int perf_mem_events__parse(const char *str); + #endif /* __PERF_MEM_EVENTS_H */ |