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Date:   Tue, 16 Mar 2021 10:41:14 +0100
From:   Peter Zijlstra <peterz@infradead.org>
To:     Huaixin Chang <changhuaixin@linux.alibaba.com>
Cc:     bsegall@google.com, dietmar.eggemann@arm.com,
        juri.lelli@redhat.com, khlebnikov@yandex-team.ru,
        linux-kernel@vger.kernel.org, mgorman@suse.de, mingo@redhat.com,
        odin@uged.al, odin@ugedal.com, pauld@redhead.com, pjt@google.com,
        rostedt@goodmis.org, shanpeic@linux.alibaba.com, tj@kernel.org,
        vincent.guittot@linaro.org, xiyou.wangcong@gmail.com
Subject: Re: [PATCH v4 1/4] sched/fair: Introduce primitives for CFS
 bandwidth burst
Message-ID: <YFB9OtuAEXPfSJk3@hirez.programming.kicks-ass.net>
References: <20210316044931.39733-1-changhuaixin@linux.alibaba.com>
 <20210316044931.39733-2-changhuaixin@linux.alibaba.com>
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On Tue, Mar 16, 2021 at 12:49:28PM +0800, Huaixin Chang wrote:
> In this patch, we introduce the notion of CFS bandwidth burst. Unused
> "quota" from pervious "periods" might be accumulated and used in the
> following "periods". The maximum amount of accumulated bandwidth is
> bounded by "burst". And the maximun amount of CPU a group can consume in
> a given period is "buffer" which is equivalent to "quota" + "burst in
> case that this group has done enough accumulation.

Complete lack of why though. Why am I going to spend time looking at
this?