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Commit cfd70a26 authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo
Browse files

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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 0808921a

tools/perf/util/evlist.c

+13 −0
Original line number Original line Diff line number Diff line
@@ -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;

tools/perf/util/evlist.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -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);