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Message-Id: <1322471015-107825-8-git-send-email-avagin@openvz.org> Date: Mon, 28 Nov 2011 12:03:35 +0300 From: Andrew Vagin <avagin@...nvz.org> To: linux-kernel@...r.kernel.org Cc: a.p.zijlstra@...llo.nl, paulus@...ba.org, mingo@...e.hu, acme@...stprotocols.net, asharma@...com, devel@...nvz.org, dsahern@...il.com, linux-perf-users@...r.kernel.org Subject: [PATCH 7/7] event: add tracepoint for accounting block 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. Signed-off-by: Andrew Vagin <avagin@...nvz.org> --- 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..be077cf 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 block time (time the task is in uninterruptible). + */ +DEFINE_EVENT(sched_stat_template, sched_stat_block, + 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 5c9e679..0d7b156 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -907,6 +907,8 @@ static void enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se) trace_sched_stat_iowait(tsk, delta); } + trace_sched_stat_block(tsk, delta); + /* * Blocking time is in units of nanosecs, so shift by * 20 to get a milliseconds-range estimation of the -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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