linux-kernel - Re: [PATCH v3 4/7] sched: make the output of schedstats independent of fair sched class

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Message-ID: <CALOAHbAG4v+ZnTohLDP6EFp50N0i=i-KTRvwhVhgmA8bZZX11Q@mail.gmail.com>
Date:   Tue, 31 Aug 2021 21:27:59 +0800
From:   Yafang Shao <laoar.shao@...il.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Ingo Molnar <mingo@...hat.com>, Mel Gorman <mgorman@...e.de>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Benjamin Segall <bsegall@...gle.com>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Alison Chaiken <achaiken@...ora.tech>,
        kbuild test robot <lkp@...el.com>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-rt-users <linux-rt-users@...r.kernel.org>
Subject: Re: [PATCH v3 4/7] sched: make the output of schedstats independent
 of fair sched class

On Tue, Aug 31, 2021 at 7:09 PM Peter Zijlstra <peterz@...radead.org> wrote:
>
> On Tue, Aug 24, 2021 at 11:29:43AM +0000, Yafang Shao wrote:
> > The per cpu stats can be show with /proc/sched_debug, which includes the
> > per cpu schedstats of each task group. Currently these per cpu
> > schedstats only show for the fair sched class. If we want to support
> > other sched classes, we have to make these output independent of fair
> > sched class.
>
> Arguably the whole rt group stuff needs to die, please don't enable it
> further.

Sure.

-- 
Thanks
Yafang