linux-kernel - [tip:sched/core] sched/debug: Add new tracepoint to track PELT at se level

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Date:   Tue, 25 Jun 2019 01:27:10 -0700
From:   tip-bot for Qais Yousef <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     dietmar.eggemann@....com, bigeasy@...utronix.de,
        linux-kernel@...r.kernel.org, hpa@...or.com, rostedt@...dmis.org,
        tglx@...utronix.de, mingo@...nel.org, quentin.perret@....com,
        u.kleine-koenig@...gutronix.de, qais.yousef@....com,
        torvalds@...ux-foundation.org, peterz@...radead.org,
        pkondeti@...eaurora.org
Subject: [tip:sched/core] sched/debug: Add new tracepoint to track PELT at
 se level

Commit-ID:  8de6242cca17d9299e654e29c966d8612d397272
Gitweb:     https://git.kernel.org/tip/8de6242cca17d9299e654e29c966d8612d397272
Author:     Qais Yousef <qais.yousef@....com>
AuthorDate: Tue, 4 Jun 2019 12:14:57 +0100
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Mon, 24 Jun 2019 19:23:42 +0200

sched/debug: Add new tracepoint to track PELT at se level

The new tracepoint allows tracking PELT signals at sched_entity level.
Which is supported in CFS tasks and taskgroups only.

Signed-off-by: Qais Yousef <qais.yousef@....com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Cc: Dietmar Eggemann <dietmar.eggemann@....com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Pavankumar Kondeti <pkondeti@...eaurora.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Quentin Perret <quentin.perret@....com>
Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Uwe Kleine-Konig <u.kleine-koenig@...gutronix.de>
Link: https://lkml.kernel.org/r/20190604111459.2862-5-qais.yousef@arm.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 include/trace/events/sched.h | 4 ++++
 kernel/sched/fair.c          | 1 +
 kernel/sched/pelt.c          | 2 ++
 3 files changed, 7 insertions(+)

diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
index 520b89d384ec..c7dd9bc7f001 100644
--- a/include/trace/events/sched.h
+++ b/include/trace/events/sched.h
@@ -617,6 +617,10 @@ DECLARE_TRACE(pelt_irq_tp,
 	TP_PROTO(struct rq *rq),
 	TP_ARGS(rq));
 
+DECLARE_TRACE(pelt_se_tp,
+	TP_PROTO(struct sched_entity *se),
+	TP_ARGS(se));
+
 #endif /* _TRACE_SCHED_H */
 
 /* This part must be outside protection */
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index e883d7e17e36..75218ab1fa07 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -3348,6 +3348,7 @@ static inline int propagate_entity_load_avg(struct sched_entity *se)
 	update_tg_cfs_runnable(cfs_rq, se, gcfs_rq);
 
 	trace_pelt_cfs_tp(cfs_rq);
+	trace_pelt_se_tp(se);
 
 	return 1;
 }
diff --git a/kernel/sched/pelt.c b/kernel/sched/pelt.c
index 4e961b55b5ea..a96db50d40e0 100644
--- a/kernel/sched/pelt.c
+++ b/kernel/sched/pelt.c
@@ -267,6 +267,7 @@ int __update_load_avg_blocked_se(u64 now, struct sched_entity *se)
 {
 	if (___update_load_sum(now, &se->avg, 0, 0, 0)) {
 		___update_load_avg(&se->avg, se_weight(se), se_runnable(se));
+		trace_pelt_se_tp(se);
 		return 1;
 	}
 
@@ -280,6 +281,7 @@ int __update_load_avg_se(u64 now, struct cfs_rq *cfs_rq, struct sched_entity *se
 
 		___update_load_avg(&se->avg, se_weight(se), se_runnable(se));
 		cfs_se_util_change(&se->avg);
+		trace_pelt_se_tp(se);
 		return 1;
 	}