linux-kernel - Re: [sched] 143e1e28cb4: +17.9% aim7.jobs-per-min, -9.7% hackbench.throughput

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Message-ID: <20140810075915.GR9918@twins.programming.kicks-ass.net>
Date:	Sun, 10 Aug 2014 09:59:15 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Fengguang Wu <fengguang.wu@...el.com>
Cc:	Vincent Guittot <vincent.guittot@...aro.org>,
	Dave Hansen <dave.hansen@...el.com>,
	LKML <linux-kernel@...r.kernel.org>, lkp@...org,
	Ingo Molnar <mingo@...nel.org>,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	Preeti U Murthy <preeti@...ux.vnet.ibm.com>
Subject: Re: [sched] 143e1e28cb4: +17.9% aim7.jobs-per-min, -9.7%
 hackbench.throughput

On Sun, Aug 10, 2014 at 12:41:27PM +0800, Fengguang Wu wrote:
> Hi Vincent,
> 
> FYI, we noticed some performance ups/downs on
> 
> commit 143e1e28cb40bed836b0a06567208bd7347c9672 ("sched: Rework sched_domain topology definition")
> 
>     128529 ± 1%     +17.9%     151594 ± 0%  brickland1/aim7/6000-page_test
>      76064 ± 3%     -32.2%      51572 ± 6%  brickland1/aim7/6000-page_test
>   59366697 ± 3%     -46.1%   32017187 ± 7%  brickland1/aim7/6000-page_test
>       2561 ± 7%     -42.9%       1463 ± 9%  brickland1/aim7/6000-page_test
>       9926 ± 2%     -43.8%       5577 ± 4%  brickland1/aim7/6000-page_test
>      19542 ± 9%     -38.3%      12057 ± 4%  brickland1/aim7/6000-page_test
>     993654 ± 2%     -19.9%     795962 ± 3%  brickland1/aim7/6000-page_test

etc..

how does one read that? afaict its a random number generator..

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