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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2009-07-23 16:52:41 +0200
committerIngo Molnar <mingo@elte.hu>2009-08-02 13:47:57 +0200
commit27d028de64bd7e1f8e72bdeae6b0586939574fcb (patch)
tree22fe9275510cc491d8adf6790979fef6284346bd /tools
parent9f498cc5be7e013d8d6e4c616980ed0ffc8680d2 (diff)
perf report: Update for the new FORK/EXIT events
Since FORK is now also issued for threads, detect those by comparing the parent and child PID. Teach it about EXIT events and ignore them. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/builtin-report.c22
1 files changed, 18 insertions, 4 deletions
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index b20a4b6e31b..95fd06cdaa9 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -99,6 +99,7 @@ struct comm_event {
struct fork_event {
struct perf_event_header header;
u32 pid, ppid;
+ u32 tid, ptid;
};
struct lost_event {
@@ -1608,15 +1609,27 @@ process_comm_event(event_t *event, unsigned long offset, unsigned long head)
}
static int
-process_fork_event(event_t *event, unsigned long offset, unsigned long head)
+process_task_event(event_t *event, unsigned long offset, unsigned long head)
{
struct thread *thread = threads__findnew(event->fork.pid);
struct thread *parent = threads__findnew(event->fork.ppid);
- dprintf("%p [%p]: PERF_EVENT_FORK: %d:%d\n",
+ dprintf("%p [%p]: PERF_EVENT_%s: (%d:%d):(%d:%d)\n",
(void *)(offset + head),
(void *)(long)(event->header.size),
- event->fork.pid, event->fork.ppid);
+ event->header.type == PERF_EVENT_FORK ? "FORK" : "EXIT",
+ event->fork.pid, event->fork.tid,
+ event->fork.ppid, event->fork.ptid);
+
+ /*
+ * A thread clone will have the same PID for both
+ * parent and child.
+ */
+ if (thread == parent)
+ return 0;
+
+ if (event->header.type == PERF_EVENT_EXIT)
+ return 0;
if (!thread || !parent || thread__fork(thread, parent)) {
dprintf("problem processing PERF_EVENT_FORK, skipping event.\n");
@@ -1706,7 +1719,8 @@ process_event(event_t *event, unsigned long offset, unsigned long head)
return process_comm_event(event, offset, head);
case PERF_EVENT_FORK:
- return process_fork_event(event, offset, head);
+ case PERF_EVENT_EXIT:
+ return process_task_event(event, offset, head);
case PERF_EVENT_LOST:
return process_lost_event(event, offset, head);