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Commit 0ea0e355 authored by Jiri Olsa's avatar Jiri Olsa Committed by Arnaldo Carvalho de Melo
Browse files

perf tools: Add stat event read function 



Introducing the perf_event__process_stat_event function to process a
'struct perf_stat' data from a stat event.

Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
Tested-by: default avatarKan Liang <kan.liang@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1445784728-21732-17-git-send-email-jolsa@kernel.org


[ Renamed 'stat' parameter to 'st' to fix 'already defined' build error with older distros (e.g. RHEL6.7) ]
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 5796f8f0

tools/perf/util/stat.c

+23 −0
Original line number Diff line number Diff line
@@ -341,3 +341,26 @@ int perf_stat_process_counter(struct perf_stat_config *config, 


	return 0;

}



int perf_event__process_stat_event(struct perf_tool *tool __maybe_unused,

				   union perf_event *event,

				   struct perf_session *session)

{

	struct perf_counts_values count;

	struct stat_event *st = &event->stat;

	struct perf_evsel *counter;



	count.val = st->val;

	count.ena = st->ena;

	count.run = st->run;



	counter = perf_evlist__id2evsel(session->evlist, st->id);

	if (!counter) {

		pr_err("Failed to resolve counter for stat event.\n");

		return -EINVAL;

	}



	*perf_counts(counter->counts, st->cpu, st->thread) = count;

	counter->supported = true;

	return 0;

}

tools/perf/util/stat.h

+6 −0
Original line number Diff line number Diff line
@@ -90,4 +90,10 @@ void perf_evlist__reset_stats(struct perf_evlist *evlist); 


int perf_stat_process_counter(struct perf_stat_config *config,

			      struct perf_evsel *counter);

struct perf_tool;

union perf_event;

struct perf_session;

int perf_event__process_stat_event(struct perf_tool *tool,

				   union perf_event *event,

				   struct perf_session *session);

#endif