From: peterz@infradead.org
To: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Jiang Biao <benbjiang@gmail.com>, Ingo Molnar <mingo@redhat.com>,
Juri Lelli <juri.lelli@redhat.com>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Steven Rostedt <rostedt@goodmis.org>,
Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
linux-kernel <linux-kernel@vger.kernel.org>,
Jiang Biao <benbjiang@tencent.com>
Subject: Re: [PATCH] sched/fair: avoid vruntime compensation for SCHED_IDLE task
Date: Thu, 20 Aug 2020 15:43:41 +0200 [thread overview]
Message-ID: <20200820134341.GW2674@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <CAKfTPtBuZOb9-W5sS=DqxcuMFa8Lw=7XqMJ_YrXEgd5zvufYjA@mail.gmail.com>
> That's been said, not compensating the vruntime for a sched_idle task
> makes sense for me. Even if that will only help for others task in the
> same cfs_rq
Yeah, but it is worth the extra pointer chasing and branches?
Then again, I suppose we started all that with the idle_h_nr_running
nonsense :/
next prev parent reply other threads:[~2020-08-20 13:46 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-20 12:00 [PATCH] sched/fair: avoid vruntime compensation for SCHED_IDLE task Jiang Biao
2020-08-20 12:51 ` Vincent Guittot
2020-08-20 12:58 ` peterz
2020-08-20 13:15 ` Vincent Guittot
2020-08-20 13:43 ` peterz [this message]
2020-08-20 14:09 ` Vincent Guittot
2020-08-20 14:24 ` Jiang Biao
2020-08-23 7:33 ` Jiang Biao
2020-08-28 12:55 ` Vincent Guittot
2020-09-01 10:14 ` Jiang Biao
2020-09-01 13:04 ` Vincent Guittot
2020-09-01 14:19 ` Jiang Biao
2020-08-20 14:19 ` Jiang Biao
2020-08-20 14:15 ` Jiang Biao
2020-08-21 0:37 ` [sched/fair] 88d13f778f: WARNING:at_kernel/sched/fair.c:#place_entity kernel test robot
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