From mboxrd@z Thu Jan 1 00:00:00 1970 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 Message-ID: <20190221012549.4069-13-acme@kernel.org> References: <20190221012549.4069-1-acme@kernel.org> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20190221012549.4069-1-acme@kernel.org> Sender: linux-kernel-owner@vger.kernel.org To: Ingo Molnar Cc: Jiri Olsa , Namhyung Kim , Clark Williams , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Alexander Shishkin , Andi Kleen , Peter Zijlstra , Arnaldo Carvalho de Melo List-Id: linux-perf-users.vger.kernel.org From: Jiri Olsa 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 Cc: Alexander Shishkin Cc: Andi Kleen Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/20190220122800.864-2-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- 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