diff options
| author | Andrew Vagin <avagin@openvz.org> | 2011-11-28 12:03:35 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-12-06 08:51:23 +0100 |
| commit | b781a602ac745ee3d5d745276f1e1905a2c101f9 (patch) | |
| tree | bae4134842fba8c0e8ab22a205b73f21eba6c1d4 | |
| parent | 391e43da797a96aeb65410281891f6d0b0e9611c (diff) | |
| download | op-kernel-dev-b781a602ac745ee3d5d745276f1e1905a2c101f9.zip op-kernel-dev-b781a602ac745ee3d5d745276f1e1905a2c101f9.tar.gz | |
events, sched: Add tracepoint for accounting blocked time
This tracepoint shows how long a task is sleeping in uninterruptible state.
E.g. it may show how long and where a mutex is waited for.
Signed-off-by: Andrew Vagin <avagin@openvz.org>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1322471015-107825-8-git-send-email-avagin@openvz.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | include/trace/events/sched.h | 7 | ||||
| -rw-r--r-- | kernel/sched/fair.c | 2 |
2 files changed, 9 insertions, 0 deletions
diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h index 959ff18..e33ed1b 100644 --- a/include/trace/events/sched.h +++ b/include/trace/events/sched.h @@ -331,6 +331,13 @@ DEFINE_EVENT(sched_stat_template, sched_stat_iowait, TP_ARGS(tsk, delay)); /* + * Tracepoint for accounting blocked time (time the task is in uninterruptible). + */ +DEFINE_EVENT(sched_stat_template, sched_stat_blocked, + TP_PROTO(struct task_struct *tsk, u64 delay), + TP_ARGS(tsk, delay)); + +/* * Tracepoint for accounting runtime (time the task is executing * on a CPU). */ diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index cd3b642..7c62e2b 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -1030,6 +1030,8 @@ static void enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se) trace_sched_stat_iowait(tsk, delta); } + trace_sched_stat_blocked(tsk, delta); + /* * Blocking time is in units of nanosecs, so shift by * 20 to get a milliseconds-range estimation of the |
