diff options
| author | Jiri Olsa <jolsa@kernel.org> | 2016-01-05 22:09:05 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-01-06 20:11:14 -0300 |
| commit | 6db1a5c190d6abe416ea36aa28a6c53e0b3bbd5e (patch) | |
| tree | 8917442646f793e3fff7e9f1c946925f4a5e8998 /tools | |
| parent | 4c96bee03247c6eab27287fa66457a231b9fab79 (diff) | |
| download | linux-6db1a5c190d6abe416ea36aa28a6c53e0b3bbd5e.tar.bz2 | |
perf stat record: Keep sample_type 0 for pipe session
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@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1452028152-26762-2-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/builtin-stat.c | 9 |
1 files changed, 8 insertions, 1 deletions
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 |