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authorFrederic Weisbecker <fweisbec@gmail.com>2010-06-01 00:03:40 +0200
committerFrederic Weisbecker <fweisbec@gmail.com>2010-06-01 00:10:32 +0200
commitaf64865ba6825e10fe62a3105fea5cadffeb52c6 (patch)
treeab3f0248fdf2d2b14794ddb19bb5202073e21861
parent13eb04fdbeb9d21dfe4696630daefe18ef6a1a84 (diff)
downloadop-kernel-dev-af64865ba6825e10fe62a3105fea5cadffeb52c6.zip
op-kernel-dev-af64865ba6825e10fe62a3105fea5cadffeb52c6.tar.gz
perf: Use event__process_task from perf sched
perf sched uses event__process_comm(), which means it can resolve comms from: - tasks that have exec'ed (kernel comm events) - tasks that were running when perf record started the actual recording (synthetized comm events) But perf sched can't resolve the pids of tasks that were created after the recording started. To solve this, we need to inherit the comms on fork events using event__process_task(). This fixes various unresolved pids in perf sched, easily visible with: perf sched record perf bench sched messaging Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Tom Zanussi <tzanussi@gmail.com> Cc: Stephane Eranian <eranian@google.com>
-rw-r--r--tools/perf/builtin-sched.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index f67bce2..55f3b5d 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -1645,6 +1645,7 @@ static struct perf_event_ops event_ops = {
.sample = process_sample_event,
.comm = event__process_comm,
.lost = event__process_lost,
+ .fork = event__process_task,
.ordered_samples = true,
};
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