linux-kernel - Re: [PATCH] sched/fair: make CFS bandwidth slice per cpu group

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Message-ID: <20180430194251.GB12217@hirez.programming.kicks-ass.net>
Date:   Mon, 30 Apr 2018 21:42:51 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Cong Wang <xiyou.wangcong@...il.com>
Cc:     linux-kernel@...r.kernel.org, Paul Turner <pjt@...gle.com>,
        Mike Galbraith <efault@....de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH] sched/fair: make CFS bandwidth slice per cpu group

On Mon, Apr 30, 2018 at 12:29:25PM -0700, Cong Wang wrote:
> Currently, the sched_cfs_bandwidth_slice_us is a global setting which
> affects all cgroups. Different groups may want different values based
> on their own workload, one size doesn't fit all. The global pool filled
> periodically is per cgroup too, they should have the right to distribute
> their own quota to each local CPU with their own frequency.

Why.. what happens? This doesn't really tell us anything.