linux-kernel - Re: [PATCH] sched: Make schedstats a runtime tunable that is disabled by default v2

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Date:	Wed, 27 Jan 2016 16:58:27 +0100
From:	Mike Galbraith <mgalbraith@...e.de>
To:	Mel Gorman <mgorman@...hsingularity.net>,
	Peter Zijlstra <peterz@...radead.org>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Matt Fleming <matt@...eblueprint.co.uk>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] sched: Make schedstats a runtime tunable that is
 disabled by default v2

On Wed, 2016-01-27 at 15:29 +0000, Mel Gorman wrote:
> Changelog since V1
> o Introduce schedstat_enabled and address Ingo's feedback
> o More schedstat-only paths eliminated, particularly ttwu_stat

As mentioned offline, with the somewhat lighter than distro config of
my box, the patch delivered ~4% on cross core pipe-test loop time, and
~2% for tbench throughput.

	-Mike