From: Andrew Vagin Date: Mon, 28 Nov 2011 09:03:35 +0000 (+0300) Subject: events, sched: Add tracepoint for accounting blocked time X-Git-Tag: v3.3-rc1~191^2~9^2~23 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b781a602ac745ee3d5d745276f1e1905a2c101f9;p=profile%2Fivi%2Fkernel-x86-ivi.git 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 Signed-off-by: Peter Zijlstra Link: http://lkml.kernel.org/r/1322471015-107825-8-git-send-email-avagin@openvz.org Signed-off-by: Ingo Molnar --- 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