diff options
| author | Andy Lutomirski <luto@amacapital.net> | 2014-06-04 13:31:15 -0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-06-05 06:09:50 -0400 |
| commit | dfc68f29ae67f2a6e799b44e6a4eb3417dffbfcd (patch) | |
| tree | 3c91426549e3e5e5c04104f083150e8aa7994cdc /include | |
| parent | 84c407084137d4e491b07ea5ff8665d19106a5ac (diff) | |
sched, trace: Add a tracepoint for IPI-less remote wakeups
Remote wakeups of polling CPUs are a valuable performance
improvement; add a tracepoint to make it much easier to verify that
they're working.
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: nicolas.pitre@linaro.org
Cc: daniel.lezcano@linaro.org
Cc: umgwanakikbuti@gmail.com
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/16205aee116772aa686814f9b13bccb562108047.1401902905.git.luto@amacapital.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/trace/events/sched.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h index 67e1bbf83695..0a68d5ae584e 100644 --- a/include/trace/events/sched.h +++ b/include/trace/events/sched.h | |||
| @@ -530,6 +530,26 @@ TRACE_EVENT(sched_swap_numa, | |||
| 530 | __entry->dst_pid, __entry->dst_tgid, __entry->dst_ngid, | 530 | __entry->dst_pid, __entry->dst_tgid, __entry->dst_ngid, |
| 531 | __entry->dst_cpu, __entry->dst_nid) | 531 | __entry->dst_cpu, __entry->dst_nid) |
| 532 | ); | 532 | ); |
| 533 | |||
| 534 | /* | ||
| 535 | * Tracepoint for waking a polling cpu without an IPI. | ||
| 536 | */ | ||
| 537 | TRACE_EVENT(sched_wake_idle_without_ipi, | ||
| 538 | |||
| 539 | TP_PROTO(int cpu), | ||
| 540 | |||
| 541 | TP_ARGS(cpu), | ||
| 542 | |||
| 543 | TP_STRUCT__entry( | ||
| 544 | __field( int, cpu ) | ||
| 545 | ), | ||
| 546 | |||
| 547 | TP_fast_assign( | ||
| 548 | __entry->cpu = cpu; | ||
| 549 | ), | ||
| 550 | |||
| 551 | TP_printk("cpu=%d", __entry->cpu) | ||
| 552 | ); | ||
| 533 | #endif /* _TRACE_SCHED_H */ | 553 | #endif /* _TRACE_SCHED_H */ |
| 534 | 554 | ||
| 535 | /* This part must be outside protection */ | 555 | /* This part must be outside protection */ |