Commit-ID: b781a602ac745ee3d5d745276f1e1905a2c101f9 Gitweb: http://git.kernel.org/tip/b781a602ac745ee3d5d745276f1e1905a2c101f9 Author: Andrew Vagin <avagin@xxxxxxxxxx> AuthorDate: Mon, 28 Nov 2011 12:03:35 +0300 Committer: Ingo Molnar <mingo@xxxxxxx> CommitDate: Tue, 6 Dec 2011 08:51:23 +0100 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@xxxxxxxxxx> Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> Link: http://lkml.kernel.org/r/1322471015-107825-8-git-send-email-avagin@xxxxxxxxxx Signed-off-by: Ingo Molnar <mingo@xxxxxxx> --- include/trace/events/sched.h | 7 +++++++ 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 -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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