linux-kernel - Re: [patch 06/15] sched: accumulate per-cfs_rq cpu usage and charge against bandwidth

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Message-ID: <BANLkTimthZFHbb0R7sgoHAKTkH6s4w0KHA@mail.gmail.com>
Date:	Wed, 18 May 2011 00:02:31 -0700
From:	Paul Turner <pjt@...gle.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	linux-kernel@...r.kernel.org,
	Bharata B Rao <bharata@...ux.vnet.ibm.com>,
	Dhaval Giani <dhaval.giani@...il.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Vaidyanathan Srinivasan <svaidy@...ux.vnet.ibm.com>,
	Srivatsa Vaddagiri <vatsa@...ibm.com>,
	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...e.hu>,
	Pavel Emelyanov <xemul@...nvz.org>,
	Nikhil Rao <ncrao@...gle.com>
Subject: Re: [patch 06/15] sched: accumulate per-cfs_rq cpu usage and charge
 against bandwidth

On Tue, May 17, 2011 at 8:28 AM, Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:
> On Mon, 2011-05-16 at 05:59 -0700, Paul Turner wrote:
>> On Mon, May 16, 2011 at 3:27 AM, Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:
>> > On Tue, 2011-05-03 at 02:28 -0700, Paul Turner wrote:
>> >> +unsigned int sysctl_sched_cfs_bandwidth_slice = 5000UL;
>> >
>> > What happens when the period is smaller than the slice?
>> >
>>
>> We'll always take at most whatever's left in this case.
>
> Right, saw that, but it might be good to have a little comment
> explaining the interaction between the slice and the period things.
>

Oh, sure -- easy enough :)
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