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From: Yafang Shao <laoar.shao@gmail.com>
To: mgorman@suse.de, mingo@redhat.com, peterz@infradead.org,
	juri.lelli@redhat.com, vincent.guittot@linaro.org,
	dietmar.eggemann@arm.com, rostedt@goodmis.org,
	bsegall@google.com, bristot@redhat.com
Cc: linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org,
	Yafang Shao <laoar.shao@gmail.com>
Subject: [PATCH v2 5/6] sched, rt: support sched_stat_runtime tracepoint for RT sched class
Date: Sat, 27 Mar 2021 18:12:52 +0800
Message-ID: <20210327101254.56872-6-laoar.shao@gmail.com> (raw)
In-Reply-To: <20210327101254.56872-1-laoar.shao@gmail.com>

The runtime of a RT task has already been there, so we only need to
add a tracepoint.

One difference between fair task and RT task is that there is no vruntime
in RT task. To reuse the sched_stat_runtime tracepoint, '0' is passed as
vruntime for RT task.

The output of this tracepoint for RT task as follows,
          stress-9748    [039] d.h.   113.519352: sched_stat_runtime: comm=stress pid=9748 runtime=997573 [ns] vruntime=0 [ns]
          stress-9748    [039] d.h.   113.520352: sched_stat_runtime: comm=stress pid=9748 runtime=997627 [ns] vruntime=0 [ns]
          stress-9748    [039] d.h.   113.521352: sched_stat_runtime: comm=stress pid=9748 runtime=998203 [ns] vruntime=0 [ns]

Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
---
 kernel/sched/rt.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index 34ad07fb924e..ae5282484710 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -1012,6 +1012,8 @@ static void update_curr_rt(struct rq *rq)
 	schedstat_set(curr->stats.exec_max,
 		      max(curr->stats.exec_max, delta_exec));
 
+	trace_sched_stat_runtime(curr, delta_exec, 0);
+
 	curr->se.sum_exec_runtime += delta_exec;
 	account_group_exec_runtime(curr, delta_exec);
 
-- 
2.18.2


  parent reply index

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-27 10:12 [PATCH v2 0/6] sched: support schedstats " Yafang Shao
2021-03-27 10:12 ` [PATCH v2 1/6] sched, fair: use __schedstat_set() in set_next_entity() Yafang Shao
2021-03-27 10:12 ` [PATCH v2 2/6] sched: make struct sched_statistics independent of fair sched class Yafang Shao
2021-03-27 10:12 ` [PATCH v2 3/6] sched: make schedstats helpers " Yafang Shao
2021-03-27 10:12 ` [PATCH v2 4/6] sched: introduce task block time in schedstats Yafang Shao
2021-03-27 10:12 ` Yafang Shao [this message]
2021-03-27 10:12 ` [PATCH v2 6/6] sched, rt: support schedstats for RT sched class Yafang Shao
2021-04-06 10:41 ` [PATCH v2 0/6] sched: " Yafang Shao

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