From: Qais Yousef <qyousef@layalina.io>
To: Vincent Guittot <vincent.guittot@linaro.org>
Cc: mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com,
dietmar.eggemann@arm.com, rostedt@goodmis.org,
bsegall@google.com, mgorman@suse.de, vschneid@redhat.com,
linux-kernel@vger.kernel.org, pierre.gondois@arm.com,
kprateek.nayak@amd.com, hongyan.xia2@arm.com,
christian.loehle@arm.com, luis.machado@arm.com
Subject: Re: [RFC PATCH 6/6 v8] sched/fair: Add EAS and idle cpu push trigger
Date: Wed, 11 Feb 2026 00:59:55 +0000 [thread overview]
Message-ID: <20260211005955.2aqc44be5wlk6nrb@airbuntu> (raw)
In-Reply-To: <CAKfTPtBChhgqy7KaStP8JsF3eS4fw1SGNuSaJ0D-UO3WzqZqZA@mail.gmail.com>
On 02/09/26 14:20, Vincent Guittot wrote:
> >
> > > + util = max(task_util_est(p), task_runnable(p));
> >
> > We must take the min(util, SCHED_CAPACITY_SCALE) here since runnable can get
> > too large making the condition above true even if you are on the biggest
> > capacity cpu.
>
> hmm task_runnable should not go above SCHED_CAPACITY_SCALE. do you
> have seen cases where task's runnable_avg goes above
> SCHED_CAPACITY_SCALE ?
>
> In fact neither task_util_est nor task_runnable should go above
> SCHED_CAPACITY_SCALE
Yes you're right. My memory is hazy now, but I recall I've seen runnable_avg
jump above 1024, but that might have been load_avg.
next prev parent reply other threads:[~2026-02-11 0:59 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-02 18:12 [PATCH 0/6 v8] sched/fair: Add push task mechanism and handle more EAS cases Vincent Guittot
2025-12-02 18:12 ` [PATCH 1/6 v8] sched/fair: Filter false overloaded_group case for EAS Vincent Guittot
2025-12-02 18:12 ` [PATCH 2/6 v8] sched/fair: Update overutilized detection Vincent Guittot
2026-02-06 17:42 ` Qais Yousef
2025-12-02 18:12 ` [PATCH 3/6 v8] sched/fair: Prepare select_task_rq_fair() to be called for new cases Vincent Guittot
2025-12-07 13:23 ` Shrikanth Hegde
2026-02-09 13:21 ` Vincent Guittot
2026-02-06 18:03 ` Qais Yousef
2026-02-09 13:21 ` Vincent Guittot
2025-12-02 18:12 ` [PATCH 4/6 v8] sched/fair: Add push task mechanism for fair Vincent Guittot
2025-12-04 10:46 ` Peter Zijlstra
2025-12-04 14:32 ` Vincent Guittot
2025-12-04 11:29 ` Peter Zijlstra
2025-12-04 14:34 ` Vincent Guittot
2025-12-05 8:59 ` Peter Zijlstra
2025-12-05 12:49 ` K Prateek Nayak
2025-12-05 12:56 ` Peter Zijlstra
2025-12-05 13:05 ` K Prateek Nayak
2025-12-05 13:36 ` Vincent Guittot
2025-12-06 3:08 ` K Prateek Nayak
2025-12-05 13:26 ` Vincent Guittot
2025-12-07 12:13 ` Shrikanth Hegde
2026-02-09 13:17 ` Vincent Guittot
2025-12-10 14:01 ` Dietmar Eggemann
2026-02-09 13:17 ` Vincent Guittot
2026-02-06 18:21 ` Qais Yousef
2026-02-09 13:18 ` Vincent Guittot
2025-12-02 18:12 ` [RFC PATCH 5/6 v8] sched/fair: Enable idle core tracking for !SMT Vincent Guittot
2025-12-05 15:52 ` Christian Loehle
2025-12-06 2:11 ` Chen, Yu C
2025-12-06 10:18 ` Vincent Guittot
2025-12-06 10:09 ` Vincent Guittot
2025-12-08 18:43 ` Christian Loehle
2025-12-02 18:12 ` [RFC PATCH 6/6 v8] sched/fair: Add EAS and idle cpu push trigger Vincent Guittot
2026-02-06 18:30 ` Qais Yousef
2026-02-09 13:20 ` Vincent Guittot
2026-02-11 0:59 ` Qais Yousef [this message]
2025-12-03 14:06 ` [PATCH 0/6 v8] sched/fair: Add push task mechanism and handle more EAS cases Christian Loehle
2025-12-10 13:30 ` Dietmar Eggemann
2026-02-06 18:32 ` Qais Yousef
2026-02-09 13:20 ` Vincent Guittot
2026-02-26 17:34 ` Pierre Gondois
2026-03-10 4:16 ` Qais Yousef
2026-03-10 10:27 ` Pierre Gondois
2026-03-10 15:11 ` Qais Yousef
2026-03-10 16:59 ` Pierre Gondois
2026-03-12 8:19 ` Vincent Guittot
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