From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Vagin Subject: [PATCH 7/7] event: add tracepoint for accounting block time Date: Mon, 28 Nov 2011 12:03:35 +0300 Message-ID: <1322471015-107825-8-git-send-email-avagin@openvz.org> References: <1322471015-107825-1-git-send-email-avagin@openvz.org> Return-path: Received: from mailhub.sw.ru ([195.214.232.25]:28437 "EHLO relay.sw.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753074Ab1K1JE6 (ORCPT ); Mon, 28 Nov 2011 04:04:58 -0500 In-Reply-To: <1322471015-107825-1-git-send-email-avagin@openvz.org> Sender: linux-perf-users-owner@vger.kernel.org List-ID: To: linux-kernel@vger.kernel.org Cc: a.p.zijlstra@chello.nl, paulus@samba.org, mingo@elte.hu, acme@ghostprotocols.net, asharma@fb.com, devel@openvz.org, dsahern@gmail.com, linux-perf-users@vger.kernel.org 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 --- 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