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| author | Andrew Vagin <avagin@openvz.org> | 2012-07-11 18:14:58 +0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-07-31 17:02:05 +0200 |
| commit | e6dab5ffab59e910ec0e3355f4a6f29f7a7be474 (patch) | |
| tree | 87acf0fb071b8d09794ac7d834cb256de030cceb /include/trace/events | |
| parent | d07bdfd322d307789f15b427dbcc39257665356f (diff) | |
| download | blackbird-obmc-linux-e6dab5ffab59e910ec0e3355f4a6f29f7a7be474.tar.gz blackbird-obmc-linux-e6dab5ffab59e910ec0e3355f4a6f29f7a7be474.zip | |
perf/trace: Add ability to set a target task for events
A few events are interesting not only for a current task.
For example, sched_stat_* events are interesting for a task
which wakes up. For this reason, it will be good if such
events will be delivered to a target task too.
Now a target task can be set by using __perf_task().
The original idea and a draft patch belongs to Peter Zijlstra.
I need these events for profiling sleep times. sched_switch is used for
getting callchains and sched_stat_* is used for getting time periods.
These events are combined in user space, then it can be analyzed by
perf tools.
Inspired-by: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Arun Sharma <asharma@fb.com>
Signed-off-by: Andrew Vagin <avagin@openvz.org>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1342016098-213063-1-git-send-email-avagin@openvz.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/trace/events')
| -rw-r--r-- | include/trace/events/sched.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h index ea7a2035456d..5a8671e8a67f 100644 --- a/include/trace/events/sched.h +++ b/include/trace/events/sched.h @@ -73,6 +73,9 @@ DECLARE_EVENT_CLASS(sched_wakeup_template, __entry->prio = p->prio; __entry->success = success; __entry->target_cpu = task_cpu(p); + ) + TP_perf_assign( + __perf_task(p); ), TP_printk("comm=%s pid=%d prio=%d success=%d target_cpu=%03d", @@ -325,6 +328,7 @@ DECLARE_EVENT_CLASS(sched_stat_template, ) TP_perf_assign( __perf_count(delay); + __perf_task(tsk); ), TP_printk("comm=%s pid=%d delay=%Lu [ns]", |
