leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

perf report: Update for the new FORK/EXIT events

Browse Source 
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>
This commit is contained in:
Peter Zijlstra 2009-07-23 16:52:41 +02:00 committed by Ingo Molnar
parent 9f498cc5be
commit 27d028de64
1 changed files with 18 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
tools/perf/builtin-report.c
View File

@ -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);