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Date: Thu, 22 Oct 2020 17:55:24 +0200 From: Vincent Guittot <vincent.guittot@...aro.org> To: A L <mail@...hevalier.se> Cc: Peter Zijlstra <peterz@...radead.org>, "Rafael J. Wysocki" <rjw@...ysocki.net>, Viresh Kumar <viresh.kumar@...aro.org>, Julia Lawall <julia.lawall@...ia.fr>, Mel Gorman <mgorman@...e.de>, Ingo Molnar <mingo@...hat.com>, kernel-janitors@...r.kernel.org, Juri Lelli <juri.lelli@...hat.com>, Dietmar Eggemann <dietmar.eggemann@....com>, Steven Rostedt <rostedt@...dmis.org>, Ben Segall <bsegall@...gle.com>, Daniel Bristot de Oliveira <bristot@...hat.com>, linux-kernel <linux-kernel@...r.kernel.org>, Valentin Schneider <valentin.schneider@....com>, Gilles Muller <Gilles.Muller@...ia.fr>, Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>, Linux PM <linux-pm@...r.kernel.org>, Len Brown <len.brown@...el.com> Subject: Re: default cpufreq gov, was: [PATCH] sched/fair: check for idle core On Thu, 22 Oct 2020 at 17:45, A L <mail@...hevalier.se> wrote: > > > > ---- From: Peter Zijlstra <peterz@...radead.org> -- Sent: 2020-10-22 - 14:29 ---- > > > 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. > > Hi, > > > Currently schedutil does not populate all stats like ondemand does, which can be a problem for some monitoring software. > > On my AMD 3000G CPU with kernel-5.9.1: > > > grep. /sys/devices/system/cpu/cpufreq/policy0/stats/* > > With ondemand: > time_in_state:3900000 145179 > time_in_state:1600000 9588482 > total_trans:177565 > trans_table: From : To > trans_table: : 3900000 1600000 > trans_table: 3900000: 0 88783 > trans_table: 1600000: 88782 0 > > With schedutil only two file exists: > reset:<empty> > total_trans:216609 > > > I'd really like to have these stats populated with schedutil, if that's possible. Your problem might have been fixed with commit 96f60cddf7a1 ("cpufreq: stats: Enable stats for fast-switch as well") > > Thanks. >
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