linux-kernel - [tip: sched/core] sched/fair: Fix cfs_rq_clock_pelt() for throttled cfs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <165062326289.4207.13116115438165020704.tip-bot2@tip-bot2>
Date:   Fri, 22 Apr 2022 10:27:42 -0000
From:   "tip-bot2 for Chengming Zhou" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Chengming Zhou <zhouchengming@...edance.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Ben Segall <bsegall@...gle.com>,
        Vincent Guittot <vincent.guittot@...aro.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: sched/core] sched/fair: Fix cfs_rq_clock_pelt() for throttled cfs_rq

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

Commit-ID:     64eaf50731ac0a8c76ce2fedd50ef6652aabc5ff
Gitweb:        https://git.kernel.org/tip/64eaf50731ac0a8c76ce2fedd50ef6652aabc5ff
Author:        Chengming Zhou <zhouchengming@...edance.com>
AuthorDate:    Fri, 08 Apr 2022 19:53:08 +08:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Fri, 22 Apr 2022 12:14:07 +02:00

sched/fair: Fix cfs_rq_clock_pelt() for throttled cfs_rq

Since commit 23127296889f ("sched/fair: Update scale invariance of PELT")
change to use rq_clock_pelt() instead of rq_clock_task(), we should also
use rq_clock_pelt() for throttled_clock_task_time and throttled_clock_task
accounting to get correct cfs_rq_clock_pelt() of throttled cfs_rq. And
rename throttled_clock_task(_time) to be clock_pelt rather than clock_task.

Fixes: 23127296889f ("sched/fair: Update scale invariance of PELT")
Signed-off-by: Chengming Zhou <zhouchengming@...edance.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Ben Segall <bsegall@...gle.com>
Reviewed-by: Vincent Guittot <vincent.guittot@...aro.org>
Link: https://lore.kernel.org/r/20220408115309.81603-1-zhouchengming@bytedance.com
---
 kernel/sched/fair.c  | 8 ++++----
 kernel/sched/pelt.h  | 4 ++--
 kernel/sched/sched.h | 4 ++--
 3 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 601f8bd..f74b340 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -4846,8 +4846,8 @@ static int tg_unthrottle_up(struct task_group *tg, void *data)
 
 	cfs_rq->throttle_count--;
 	if (!cfs_rq->throttle_count) {
-		cfs_rq->throttled_clock_task_time += rq_clock_task(rq) -
-					     cfs_rq->throttled_clock_task;
+		cfs_rq->throttled_clock_pelt_time += rq_clock_pelt(rq) -
+					     cfs_rq->throttled_clock_pelt;
 
 		/* Add cfs_rq with load or one or more already running entities to the list */
 		if (!cfs_rq_is_decayed(cfs_rq) || cfs_rq->nr_running)
@@ -4864,7 +4864,7 @@ static int tg_throttle_down(struct task_group *tg, void *data)
 
 	/* group is entering throttled state, stop time */
 	if (!cfs_rq->throttle_count) {
-		cfs_rq->throttled_clock_task = rq_clock_task(rq);
+		cfs_rq->throttled_clock_pelt = rq_clock_pelt(rq);
 		list_del_leaf_cfs_rq(cfs_rq);
 	}
 	cfs_rq->throttle_count++;
@@ -5308,7 +5308,7 @@ static void sync_throttle(struct task_group *tg, int cpu)
 	pcfs_rq = tg->parent->cfs_rq[cpu];
 
 	cfs_rq->throttle_count = pcfs_rq->throttle_count;
-	cfs_rq->throttled_clock_task = rq_clock_task(cpu_rq(cpu));
+	cfs_rq->throttled_clock_pelt = rq_clock_pelt(cpu_rq(cpu));
 }
 
 /* conditionally throttle active cfs_rq's from put_prev_entity() */
diff --git a/kernel/sched/pelt.h b/kernel/sched/pelt.h
index c336f5f..4ff2ed4 100644
--- a/kernel/sched/pelt.h
+++ b/kernel/sched/pelt.h
@@ -145,9 +145,9 @@ static inline u64 rq_clock_pelt(struct rq *rq)
 static inline u64 cfs_rq_clock_pelt(struct cfs_rq *cfs_rq)
 {
 	if (unlikely(cfs_rq->throttle_count))
-		return cfs_rq->throttled_clock_task - cfs_rq->throttled_clock_task_time;
+		return cfs_rq->throttled_clock_pelt - cfs_rq->throttled_clock_pelt_time;
 
-	return rq_clock_pelt(rq_of(cfs_rq)) - cfs_rq->throttled_clock_task_time;
+	return rq_clock_pelt(rq_of(cfs_rq)) - cfs_rq->throttled_clock_pelt_time;
 }
 #else
 static inline u64 cfs_rq_clock_pelt(struct cfs_rq *cfs_rq)
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 58263f9..762be73 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -603,8 +603,8 @@ struct cfs_rq {
 	s64			runtime_remaining;
 
 	u64			throttled_clock;
-	u64			throttled_clock_task;
-	u64			throttled_clock_task_time;
+	u64			throttled_clock_pelt;
+	u64			throttled_clock_pelt_time;
 	int			throttled;
 	int			throttle_count;
 	struct list_head	throttled_list;