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| author | Steven Rostedt <srostedt@redhat.com> | 2009-03-24 11:06:24 -0400 |
|---|---|---|
| committer | Steven Rostedt <srostedt@redhat.com> | 2009-03-24 11:06:24 -0400 |
| commit | be6f164a02f394675e2ac2077dd354cebef5b4c0 (patch) | |
| tree | 9805294731c00ddb61857a4e1e42019058eb1542 /kernel/trace/trace.h | |
| parent | 8aef2d2856158a36c295a8d1288281e4839bff13 (diff) | |
function-graph: add option for include sleep times
Impact: give user a choice to show times spent while sleeping
The user may want to see the time a function spent sleeping.
This patch adds the trace option "sleep-time" to allow that.
The "sleep-time" option is default on.
echo sleep-time > /debug/tracing/trace_options
produces:
------------------------------------------
2) avahi-d-3428 => <idle>-0
------------------------------------------
2) | finish_task_switch() {
2) 0.621 us | _spin_unlock_irq();
2) 2.202 us | }
2) ! 1002.197 us | }
2) ! 1003.521 us | }
where as,
echo nosleep-time > /debug/tracing/trace_options
produces:
0) <idle>-0 => yum-upd-3416
------------------------------------------
0) | finish_task_switch() {
0) 0.643 us | _spin_unlock_irq();
0) 2.342 us | }
0) + 41.302 us | }
0) + 42.453 us | }
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Diffstat (limited to 'kernel/trace/trace.h')
| -rw-r--r-- | kernel/trace/trace.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 7cfb741be200..d7410bbb9a80 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -683,6 +683,7 @@ enum trace_iterator_flags { TRACE_ITER_CONTEXT_INFO = 0x20000, /* Print pid/cpu/time */ TRACE_ITER_LATENCY_FMT = 0x40000, TRACE_ITER_GLOBAL_CLK = 0x80000, + TRACE_ITER_SLEEP_TIME = 0x100000, }; /* |