Re: default cpufreq gov, was: [PATCH] sched/fair: check for idle core

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To: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>
Subject: Re: default cpufreq gov, was: [PATCH] sched/fair: check for idle core
From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Date: Thu, 22 Oct 2020 14:29:49 +0200
Cc: Viresh Kumar <viresh.kumar@xxxxxxxxxx>, Julia Lawall <julia.lawall@xxxxxxxx>, Mel Gorman <mgorman@xxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, kernel-janitors@xxxxxxxxxxxxxxx, Juri Lelli <juri.lelli@xxxxxxxxxx>, Vincent Guittot <vincent.guittot@xxxxxxxxxx>, Dietmar Eggemann <dietmar.eggemann@xxxxxxx>, Steven Rostedt <rostedt@xxxxxxxxxxx>, Ben Segall <bsegall@xxxxxxxxxx>, Daniel Bristot de Oliveira <bristot@xxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, Valentin Schneider <valentin.schneider@xxxxxxx>, Gilles Muller <Gilles.Muller@xxxxxxxx>, srinivas.pandruvada@xxxxxxxxxxxxxxx, Linux PM <linux-pm@xxxxxxxxxxxxxxx>, Len Brown <len.brown@xxxxxxxxx>
In-reply-to: <1790766.jaFeG3T87Z@kreacher>
References: <1603211879-1064-1-git-send-email-Julia.Lawall@inria.fr> <34115486.YmRjPRKJaA@kreacher> <20201022120213.GG2611@hirez.programming.kicks-ass.net> <1790766.jaFeG3T87Z@kreacher>

On Thu, Oct 22, 2020 at 02:19:29PM +0200, Rafael J. Wysocki wrote:
> > However I do want to retire ondemand, conservative and also very much
> > intel_pstate/active mode.
> 
> I agree in general, but IMO it would not be prudent to do that without making
> schedutil provide the same level of performance in all of the relevant use
> cases.

Agreed; I though to have understood we were there already.

Follow-Ups:
- Re: default cpufreq gov, was: [PATCH] sched/fair: check for idle core
  - From: A L
- Re: default cpufreq gov, was: [PATCH] sched/fair: check for idle core
  - From: Mel Gorman

References:
- [PATCH] sched/fair: check for idle core
  - From: Julia Lawall
- Re: [PATCH] sched/fair: check for idle core
  - From: Rafael J. Wysocki
- default cpufreq gov, was: [PATCH] sched/fair: check for idle core
  - From: Peter Zijlstra
- Re: default cpufreq gov, was: [PATCH] sched/fair: check for idle core
  - From: Rafael J. Wysocki

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