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authorFrederic Weisbecker <fweisbec@gmail.com>2010-06-01 00:43:07 +0200
committerFrederic Weisbecker <fweisbec@gmail.com>2010-06-01 00:43:07 +0200
commitdd833d713ccc79e00176eb1b3a6c65638c44e27b (patch)
tree96f04a64e8d67f6dd5fc5f77882fc97ee840ec8b /tools
parentaf64865ba6825e10fe62a3105fea5cadffeb52c6 (diff)
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perf: Do the comm inheritance per thread in event__process_task
event__process_task() doesn't propagate the comm copy on clone, but only on process fork. So we loose all the tid:comm resolution for tasks that aren't a main process thread. Progragate the per thread granularity to event__process_task for pid resolution. This fixes various unresolved pids in perf sched, especially when we trace multithread processes. The problem is quickly reproducible with the messaging benchmark using the multithread mode "-t" : perf sched record perf bench sched messaging -t 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>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/util/event.c9
1 files changed, 2 insertions, 7 deletions
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index d28d80968f3..1f08f008d28 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -532,16 +532,11 @@ out_problem:
int event__process_task(event_t *self, struct perf_session *session)
{
- struct thread *thread = perf_session__findnew(session, self->fork.pid);
- struct thread *parent = perf_session__findnew(session, self->fork.ppid);
+ struct thread *thread = perf_session__findnew(session, self->fork.tid);
+ struct thread *parent = perf_session__findnew(session, self->fork.ptid);
dump_printf("(%d:%d):(%d:%d)\n", self->fork.pid, self->fork.tid,
self->fork.ppid, self->fork.ptid);
- /*
- * A thread clone will have the same PID for both parent and child.
- */
- if (thread == parent)
- return 0;
if (self->header.type == PERF_RECORD_EXIT)
return 0;