Commit-ID: 529c1a9e18c3b470d2eff7879923eda40b1431db Gitweb: https://git.kernel.org/tip/529c1a9e18c3b470d2eff7879923eda40b1431db Author: Jiri Olsa <jolsa@xxxxxxxxxx> AuthorDate: Wed, 20 Feb 2019 13:27:55 +0100 Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> CommitDate: Wed, 20 Feb 2019 16:07:51 -0300 perf session: Don't report zero period samples for slave events 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@xxxxxxxxxx> Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx> Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx> Cc: Namhyung Kim <namhyung@xxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Link: http://lkml.kernel.org/r/20190220122800.864-2-jolsa@xxxxxxxxxx Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> --- 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); }
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