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Date:   Tue, 05 Oct 2021 14:12:07 -0000
From:   "tip-bot2 for Yafang Shao" <>
Cc:     Yafang Shao <>,
        "Peter Zijlstra (Intel)" <>,,
Subject: [tip: sched/core] sched/rt: Support sched_stat_runtime tracepoint for
 RT sched class

The following commit has been merged into the sched/core branch of tip:

Commit-ID:     ed7b564cfdd0668efbd739d0b4e2d67797293f32
Author:        Yafang Shao <>
AuthorDate:    Sun, 05 Sep 2021 14:35:44 
Committer:     Peter Zijlstra <>
CommitterDate: Tue, 05 Oct 2021 15:51:49 +02:00

sched/rt: Support sched_stat_runtime tracepoint for RT sched class

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 <>
Signed-off-by: Peter Zijlstra (Intel) <>
 kernel/sched/rt.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index 95a7c3a..5d25111 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -1012,6 +1012,8 @@ static void update_curr_rt(struct rq *rq)
 		      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);

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