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| author | Arjan van de Ven <arjan@linux.intel.com> | 2009-09-12 07:52:47 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-09-19 11:42:10 +0200 |
| commit | 393b2ad8c757ba3ccd2a99ca5bbcd6db4d3fa53d (patch) | |
| tree | 8972e2e9647c814e71be74d37adb85b18e9c6732 | |
| parent | 929bf0d0156562ce631728b6fa53d68004d456d2 (diff) | |
| download | kernel_samsung_smdk4412-393b2ad8c757ba3ccd2a99ca5bbcd6db4d3fa53d.tar.gz kernel_samsung_smdk4412-393b2ad8c757ba3ccd2a99ca5bbcd6db4d3fa53d.tar.bz2 kernel_samsung_smdk4412-393b2ad8c757ba3ccd2a99ca5bbcd6db4d3fa53d.zip | |
perf: Add a timestamp to fork events
perf timechart needs to know when a process forked, in order to be
able to visualize properly when tasks start.
This patch adds a time field to the event structure, and fills it
in appropriately.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <20090912130341.51ad2de2@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | include/linux/perf_counter.h | 2 | ||||
| -rw-r--r-- | kernel/perf_counter.c | 11 | ||||
| -rw-r--r-- | tools/perf/util/event.h | 1 |
3 files changed, 12 insertions, 2 deletions
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h index c7375f97aa1..bd341007c4f 100644 --- a/include/linux/perf_counter.h +++ b/include/linux/perf_counter.h @@ -336,6 +336,7 @@ enum perf_event_type { * struct perf_event_header header; * u32 pid, ppid; * u32 tid, ptid; + * u64 time; * }; */ PERF_EVENT_EXIT = 4, @@ -356,6 +357,7 @@ enum perf_event_type { * struct perf_event_header header; * u32 pid, ppid; * u32 tid, ptid; + * { u64 time; } && PERF_SAMPLE_TIME * }; */ PERF_EVENT_FORK = 7, diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c index d013f4e89e9..d5899b62b27 100644 --- a/kernel/perf_counter.c +++ b/kernel/perf_counter.c @@ -3083,6 +3083,7 @@ struct perf_task_event { u32 ppid; u32 tid; u32 ptid; + u64 time; } event; }; @@ -3090,9 +3091,12 @@ static void perf_counter_task_output(struct perf_counter *counter, struct perf_task_event *task_event) { struct perf_output_handle handle; - int size = task_event->event.header.size; + int size; struct task_struct *task = task_event->task; - int ret = perf_output_begin(&handle, counter, size, 0, 0); + int ret; + + size = task_event->event.header.size; + ret = perf_output_begin(&handle, counter, size, 0, 0); if (ret) return; @@ -3103,7 +3107,10 @@ static void perf_counter_task_output(struct perf_counter *counter, task_event->event.tid = perf_counter_tid(counter, task); task_event->event.ptid = perf_counter_tid(counter, current); + task_event->event.time = perf_clock(); + perf_output_put(&handle, task_event->event); + perf_output_end(&handle); } diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h index 2495529cae7..28a579f8fa8 100644 --- a/tools/perf/util/event.h +++ b/tools/perf/util/event.h @@ -39,6 +39,7 @@ struct fork_event { struct perf_event_header header; u32 pid, ppid; u32 tid, ptid; + u64 time; }; struct lost_event { |