diff options
author | Andrew Vagin <avagin@openvz.org> | 2012-07-11 10:14:58 -0400 |
---|---|---|
committer | Ingo Molnar <mingo@kernel.org> | 2012-07-31 11:02:05 -0400 |
commit | e6dab5ffab59e910ec0e3355f4a6f29f7a7be474 (patch) | |
tree | 87acf0fb071b8d09794ac7d834cb256de030cceb /kernel/events/internal.h | |
parent | d07bdfd322d307789f15b427dbcc39257665356f (diff) |
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 'kernel/events/internal.h')
-rw-r--r-- | kernel/events/internal.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/events/internal.h b/kernel/events/internal.h index b0b107f90af..a096c19f2c2 100644 --- a/kernel/events/internal.h +++ b/kernel/events/internal.h | |||
@@ -101,7 +101,8 @@ __output_copy(struct perf_output_handle *handle, | |||
101 | } | 101 | } |
102 | 102 | ||
103 | /* Callchain handling */ | 103 | /* Callchain handling */ |
104 | extern struct perf_callchain_entry *perf_callchain(struct pt_regs *regs); | 104 | extern struct perf_callchain_entry * |
105 | perf_callchain(struct perf_event *event, struct pt_regs *regs); | ||
105 | extern int get_callchain_buffers(void); | 106 | extern int get_callchain_buffers(void); |
106 | extern void put_callchain_buffers(void); | 107 | extern void put_callchain_buffers(void); |
107 | 108 | ||