Messages in this thread Patch in this message | | | From | Arnaldo Carvalho de Melo <> | Subject | [PATCH 12/17] perf session: Don't report zero period samples for slave events | Date | Wed, 20 Feb 2019 22:25:44 -0300 |
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From: Jiri Olsa <jolsa@kernel.org>
There's no reason to deliver a sample with zero period. It means there was no value for slave event since its last group leader sample.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20190220122800.864-2-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/perf/util/session.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index 18fb9c8cbf9c..c764bbc91009 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -1202,6 +1202,13 @@ static int deliver_sample_value(struct perf_evlist *evlist, return 0; } + /* + * There's no reason to deliver sample + * for zero period, bail out. + */ + if (!sample->period) + return 0; + return tool->sample(tool, event, sample, sid->evsel, machine); } -- 2.19.1
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