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Message-Id: <1452276186-15202-23-git-send-email-acme@kernel.org>
Date: Fri, 8 Jan 2016 15:02:29 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Ingo Molnar <mingo@...nel.org>
Cc: linux-kernel@...r.kernel.org, Jiri Olsa <jolsa@...nel.org>,
David Ahern <dsahern@...il.com>,
Kan Liang <kan.liang@...el.com>,
Namhyung Kim <namhyung@...nel.org>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 22/59] perf stat record: Keep sample_type 0 for pipe session
From: Jiri Olsa <jolsa@...nel.org>
For pipe sessions we need to keep sample_type zero, because script's
perf_evsel__check_attr is triggered by sample_type != 0, and the check
would fail on stat session.
I was tempted to keep it zero unconditionally, but the pipe session is
sufficient. In perf.data session we are guarded by HEADER_STAT feature.
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
Cc: David Ahern <dsahern@...il.com>
Cc: Kan Liang <kan.liang@...el.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Link: http://lkml.kernel.org/r/1452028152-26762-2-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
tools/perf/builtin-stat.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 9805e03ab163..7f568244662b 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -184,11 +184,18 @@ static int create_perf_stat_counter(struct perf_evsel *evsel)
* like tracepoints. Clear it up for counting.
*/
attr->sample_period = 0;
+
/*
* But set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
* while avoiding that older tools show confusing messages.
+ *
+ * However for pipe sessions we need to keep it zero,
+ * because script's perf_evsel__check_attr is triggered
+ * by attr->sample_type != 0, and we can't run it on
+ * stat sessions.
*/
- attr->sample_type = PERF_SAMPLE_IDENTIFIER;
+ if (!(STAT_RECORD && perf_stat.file.is_pipe))
+ attr->sample_type = PERF_SAMPLE_IDENTIFIER;
/*
* Disabling all counters initially, they will be enabled
--
2.1.0
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