From: Vincent Guittot <vincent.guittot@linaro.org>
To: "Feiran Zheng ." <fam.zheng@bytedance.com>
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>
Subject: Re: [External] Re: [RFC PATCH] sched: Enable root level cgroup bandwidth control
Date: Mon, 23 May 2022 17:36:29 +0200 [thread overview]
Message-ID: <CAKfTPtB9gd5M6vvX+h3aZdOBVkWw0d+U5G5kUUtwsWuH_vanZA@mail.gmail.com> (raw)
In-Reply-To: <CAG+v+Kaa6Rfza_WewMw4K=vRTrt9UhRXp7G3XVi9cd_LvZkVEQ@mail.gmail.com>
On Wed, 18 May 2022 at 17:55, Feiran Zheng . <fam.zheng@bytedance.com> wrote:
>
> 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.
cgroup is about allocating runtime to a group but you want to force a
system idle for power consideration so it looks like abusing the
interface
>
> Alternatively, I assume we can look into a device-independent idle
> injection mechanism?
Yes, idle injection is device-independent and fit better with your needs
thermal framework already support cpu idle cooling device but I'm not
sure your case is only related to thermal so you might want a more
generic interface like powercap--> dtpm --> idle injection
>
> Fam
prev parent reply other threads:[~2022-05-23 15:36 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-18 10:08 [RFC PATCH] sched: Enable root level cgroup bandwidth control Fam Zheng
2022-05-18 10:21 ` Peter Zijlstra
2022-05-18 10:38 ` [External] " Feiran Zheng .
2022-05-18 12:03 ` Vincent Guittot
2022-05-18 12:55 ` Feiran Zheng .
2022-05-18 14:31 ` Vincent Guittot
2022-05-18 15:55 ` Feiran Zheng .
2022-05-23 15:36 ` Vincent Guittot [this message]
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