There's no reason to deliver sample for zero period. It means there was no value for slave event since its last group leader sample.
Link: http://lkml.kernel.org/n/tip-d5he0papol5dhwvfq33es...@git.kernel.org Signed-off-by: Jiri Olsa <jo...@kernel.org> --- 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); } -- 2.17.2
