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From:   "Feiran Zheng ." <fam.zheng@bytedance.com>
Date:   Wed, 18 May 2022 16:55:09 +0100
Message-ID: <CAG+v+Kaa6Rfza_WewMw4K=vRTrt9UhRXp7G3XVi9cd_LvZkVEQ@mail.gmail.com>
Subject: Re: [External] Re: [RFC PATCH] sched: Enable root level cgroup
 bandwidth control
To:     Vincent Guittot <vincent.guittot@linaro.org>
Cc:     Peter Zijlstra <peterz@infradead.org>,
        linux-kernel@vger.kernel.org, Steven Rostedt <rostedt@goodmis.org>,
        Ben Segall <bsegall@google.com>,
        Daniel Bristot de Oliveira <bristot@redhat.com>,
        Dietmar Eggemann <dietmar.eggemann@arm.com>,
        zhouchengming@bytedance.com, fam@euphon.net,
        Mel Gorman <mgorman@suse.de>, Ingo Molnar <mingo@redhat.com>,
        songmuchun@bytedance.com, Juri Lelli <juri.lelli@redhat.com>,
        Daniel Lezcano <daniel.lezcano@linaro.org>,
        Cristian Marussi <cristian.marussi@arm.com>
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On Wed, May 18, 2022 at 3:31 PM Vincent Guittot
<vincent.guittot@linaro.org> wrote:
> there is a DTPM powercap provider in the latest kernel and a scmi
> power capp provider is under review


Thanks, so DTPM can be a good solution for ARM. We could also deal
with AMD with acpi-cpufreq if powercap is not supported yet.

That aside, I think cpu cgroup has a familiar and simple sysfs
interface, and is more importantly hardware agnostic so it would be
really nice to have.

Alternatively, I assume we can look into a device-independent idle
injection mechanism?

Fam