linux-kernel - [PATCH v3 2/3] sched: Don't trace stat runtime for task group

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Message-Id: <20231031125928.235685-3-yajun.deng@linux.dev>
Date:   Tue, 31 Oct 2023 20:59:27 +0800
From:   Yajun Deng <yajun.deng@...ux.dev>
To:     mingo@...hat.com, peterz@...radead.org, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
        bristot@...hat.com, vschneid@...hat.com
Cc:     linux-kernel@...r.kernel.org, Yajun Deng <yajun.deng@...ux.dev>
Subject: [PATCH v3 2/3] sched: Don't trace stat runtime for task group

The rt entity can be a task group. We will trace stat runtime for each
task, so we don't need to trace stat runtime for task group.

Move trace_sched_stat_runtime in update_current_exec_runtime.

Signed-off-by: Yajun Deng <yajun.deng@...ux.dev>
---
v3: New patch.
---
 kernel/sched/deadline.c | 2 --
 kernel/sched/rt.c       | 2 --
 kernel/sched/sched.h    | 1 +
 3 files changed, 1 insertion(+), 4 deletions(-)

diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index a9f84428c4b5..70b5c5b47106 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -1301,8 +1301,6 @@ static void update_curr_dl(struct rq *rq)
 	schedstat_set(curr->stats.exec_max,
 		      max(curr->stats.exec_max, delta_exec));
 
-	trace_sched_stat_runtime(curr, delta_exec, 0);
-
 	update_current_exec_runtime(curr, now, delta_exec, true);
 
 	if (dl_entity_is_special(dl_se))
diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index 79cf80d73822..1e155c7658ae 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -1016,8 +1016,6 @@ 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);
-
 	update_current_exec_runtime(curr, now, delta_exec,
 				    rt_entity_is_task(rt_se));
 
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 6f0169d9b306..f7014e19bc0a 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -3268,6 +3268,7 @@ static inline void update_current_exec_runtime(struct task_struct *curr,
 	curr->se.exec_start = now;
 
 	if (task) {
+		trace_sched_stat_runtime(curr, delta_exec, curr->se.vruntime);
 		account_group_exec_runtime(curr, delta_exec);
 		cgroup_account_cputime(curr, delta_exec);
 	}
-- 
2.25.1