linux-kernel - Re: [sched/numa] 6499b1b2dd: phoronix-test-suite.aom-av1.0.frames_per

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Date:   Fri, 6 Mar 2020 09:06:08 +0000
From:   Mel Gorman <mgorman@...hsingularity.net>
To:     kernel test robot <oliver.sang@...el.com>
Cc:     Vincent Guittot <vincent.guittot@...aro.org>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Juri Lelli <juri.lelli@...hat.com>,
        Valentin Schneider <valentin.schneider@....com>,
        Phil Auld <pauld@...hat.com>, Hillf Danton <hdanton@...a.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>, lkp@...ts.01.org
Subject: Re: [sched/numa]  6499b1b2dd:
 phoronix-test-suite.aom-av1.0.frames_per_second -25.0% regression

On Fri, Mar 06, 2020 at 10:35:51AM +0800, kernel test robot wrote:
> Greeting,
> 
> FYI, we noticed a -25.0% regression of phoronix-test-suite.aom-av1.0.frames_per_second due to commit:
> 
> 
> commit: 6499b1b2dd1b8d404a16b9fbbf1af6b9b3c1d83d ("sched/numa: Replace runnable_load_avg by load_avg")
> https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
> 
> in testcase: phoronix-test-suite
> on test machine: 16 threads Intel(R) Xeon(R) CPU X5570 @ 2.93GHz with 48G memory
> with following parameters:
> 
> 	test: aom-av1-1.2.0
> 	cpufreq_governor: performance
> 	ucode: 0x1d
> 
> test-description: The Phoronix Test Suite is the most comprehensive testing and benchmarking platform available that provides an extensible framework for which new tests can be easily added.
> test-url: http://www.phoronix-test-suite.com/
> 

The middle of this series is not safe for bisection from a performance
perspective. It needs to be determined if the series is ok only after
all the patches are applied.

-- 
Mel Gorman
SUSE Labs