linux-kernel - Re: [PATCH] sched/deadline: Always calculate end of period on sched

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Message-ID: <56C1C685.6030601@redhat.com>
Date:	Mon, 15 Feb 2016 10:37:25 -0200
From:	Daniel Bristot de Oliveira <bristot@...hat.com>
To:	Juri Lelli <juri.lelli@....com>,
	Steven Rostedt <rostedt@...dmis.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Juri Lelli <juri.lelli@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	Clark Williams <williams@...hat.com>,
	John Kacur <jkacur@...hat.com>
Subject: Re: [PATCH] sched/deadline: Always calculate end of period on
 sched_yield()



On 02/15/2016 08:18 AM, Juri Lelli wrote:
> Do you think we could also skip some of the
> following updates/accounting in this case? Not sure we win anything by
> doing that, though.

I reviewed rostedt's patch and the following updates/accounting
operations. I agree with rostedt's patch, and also agree that
if (delta_exec == 0) it is a good idea to skip some += 0 and
function calls of the next updates/accounting operations,
before the if (dl_runtime_exeeded...).