Messages in this thread Patch in this message | | | Date | Fri, 30 Jan 2015 10:33:20 -0800 | From | tip-bot for Namhyung Kim <> | Subject | [tip:perf/core] perf evsel: Set attr.task bit for a tracking event |
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Commit-ID: 62e503b7ed98fcdf16308cda0b5378e7840f4339 Gitweb: http://git.kernel.org/tip/62e503b7ed98fcdf16308cda0b5378e7840f4339 Author: Namhyung Kim <namhyung@kernel.org> AuthorDate: Thu, 29 Jan 2015 17:06:46 +0900 Committer: Arnaldo Carvalho de Melo <acme@redhat.com> CommitDate: Thu, 29 Jan 2015 16:54:59 -0300
perf evsel: Set attr.task bit for a tracking event
The perf_event_attr.task bit is to track task (fork and exit) events but it missed to be set by perf_evsel__config(). While it was not a problem in practice since setting other bits (comm/mmap) ended up being in same result, it'd be good to set it explicitly anyway.
The attr->task is to track task related events (fork/exit) only but other meta events like comm and mmap[2] also needs the task events. So setting attr->comm and/or attr->mmap causes the kernel emits the task events anyway. So the attr->task is only meaningful when other bits are off but I'd like to set it for completeness.
Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1422518843-25818-6-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/perf/util/evsel.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 1d826d6..ea51a90 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -709,6 +709,7 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts) if (opts->sample_weight) perf_evsel__set_sample_bit(evsel, WEIGHT); + attr->task = track; attr->mmap = track; attr->mmap2 = track && !perf_missing_features.mmap2; attr->comm = track;
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