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From: Tejun Heo <tj@kernel.org>
To: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
	linux-kernel@vger.kernel.org, mingo@kernel.org,
	juri.lelli@redhat.com, dietmar.eggemann@arm.com,
	rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de,
	vschneid@redhat.com, longman@redhat.com, hannes@cmpxchg.org,
	mkoutny@suse.com, void@manifault.com, arighi@nvidia.com,
	changwoo@igalia.com, cgroups@vger.kernel.org,
	sched-ext@lists.linux.dev, liuwenfang@honor.com,
	tglx@linutronix.de, Joel Fernandes <joelagnelf@nvidia.com>
Subject: Re: [RFC][PATCH 2/3] sched: Add support to pick functions to take rf
Date: Mon, 13 Oct 2025 07:20:08 -1000	[thread overview]
Message-ID: <aO00yNQozDw6N6jS@slm.duckdns.org> (raw)
In-Reply-To: <CAKfTPtDGsS-+DZEemg6vqbQVV5Xds9TNVnOAOvyeNsw0Kn3Mzw@mail.gmail.com>

On Mon, Oct 13, 2025 at 03:06:33PM +0200, Vincent Guittot wrote:
...
> > And then we have next_active_class() skip fair_sched_class entirely when
> > scx_switch_all().
> 
> Ah yes you're right. fair is not called in case of scx_switched_all()

Yeah, when siwtch_all this isn't an issue at all. In partial mode, the extra
new idle may be noticeable but I don't think many people are using partial
mode, so we can worry about it when it becomes a problem.

Thanks.

-- 
tejun

  reply	other threads:[~2025-10-13 17:20 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-10-06 10:46 [RFC][PATCH 0/3] sched/ext: Cleanup pick_task_scx() Peter Zijlstra
2025-10-06 10:46 ` [RFC][PATCH 1/3] sched: Detect per-class runqueue changes Peter Zijlstra
2025-10-07 10:08   ` Juri Lelli
2025-10-07 10:16     ` Peter Zijlstra
2025-10-07 10:26       ` Juri Lelli
2025-10-16  9:33   ` [tip: sched/core] " tip-bot2 for Peter Zijlstra
2025-10-06 10:46 ` [RFC][PATCH 2/3] sched: Add support to pick functions to take rf Peter Zijlstra
2025-10-08 13:16   ` Vincent Guittot
2025-10-08 13:58     ` Peter Zijlstra
2025-10-08 15:22       ` Vincent Guittot
2025-10-08 20:34         ` Tejun Heo
2025-10-09  7:17           ` Vincent Guittot
2025-10-13 11:04             ` Peter Zijlstra
2025-10-13 11:09               ` Peter Zijlstra
2025-10-13 13:06                 ` Vincent Guittot
2025-10-13 17:20                   ` Tejun Heo [this message]
2025-10-16  9:33   ` [tip: sched/core] " tip-bot2 for Joel Fernandes
2025-10-06 10:46 ` [RFC][PATCH 3/3] sched/ext: Fold balance_scx() into pick_task_scx() Peter Zijlstra
2025-10-16  9:33   ` [tip: sched/core] " tip-bot2 for Peter Zijlstra
2025-10-07 12:40 ` [RFC][PATCH 0/3] sched/ext: Cleanup pick_task_scx() Christian Loehle
2025-10-07 21:48 ` Tejun Heo
2025-10-08  9:11   ` Peter Zijlstra
2025-10-08 20:21     ` Tejun Heo

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