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perf evlist: Introduce set_filter_pid method 

To filter out events for a certain pid, for instance, when tracing
system wide, so that the tracer itself doesn't creates an event loop.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-byoia9dzu4gmkdv87etnd9zf@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2015-02-21 10:09:55 -08:00
parent 0808921a14
commit cfd70a26aa
2 changed files with 14 additions and 0 deletions
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13
tools/perf/util/evlist.c
View File

@ -1085,6 +1085,19 @@ int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter)
return err; return err;
} }
int perf_evlist__set_filter_pid(struct perf_evlist *evlist, pid_t pid)
{
char *filter;
int ret;
if (asprintf(&filter, "common_pid != %d", pid) < 0)
return -1;
ret = perf_evlist__set_filter(evlist, filter);
free(filter);
return ret;
}
bool perf_evlist__valid_sample_type(struct perf_evlist *evlist) bool perf_evlist__valid_sample_type(struct perf_evlist *evlist)
{ {
struct perf_evsel *pos; struct perf_evsel *pos;

1
tools/perf/util/evlist.h
View File

@ -77,6 +77,7 @@ int perf_evlist__add_newtp(struct perf_evlist *evlist,
const char *sys, const char *name, void *handler); const char *sys, const char *name, void *handler);
int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter); int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter);
int perf_evlist__set_filter_pid(struct perf_evlist *evlist, pid_t pid);
struct perf_evsel * struct perf_evsel *
perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id); perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id);