linux-kernel - Re: [LKP] [x86, sched] 1567c3e346: vm-scalability.median -15.8% regression

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Date:   Fri, 12 Jun 2020 16:11:13 +0800
From:   Xing Zhengjun <zhengjun.xing@...ux.intel.com>
To:     Giovanni Gherdovich <ggherdovich@...e.cz>,
        kernel test robot <oliver.sang@...el.com>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Doug Smythies <dsmythies@...us.net>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.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: [LKP] [x86, sched] 1567c3e346: vm-scalability.median -15.8%
 regression

Hi Giovanni,

    I test the regression, it still existed in v5.7.  Do you have time 
to take a look at this? Thanks.

=========================================================================================
tbox_group/testcase/rootfs/kconfig/compiler/runtime/debug-setup/size/test/cpufreq_governor/ucode:
 
lkp-hsw-4ex1/vm-scalability/debian-x86_64-20191114.cgz/x86_64-rhel-7.6/gcc-7/300s/test/8T/anon-cow-seq/performance/0x16

commit:
   2a4b03ffc69f2dedc6388e9a6438b5f4c133a40d
   1567c3e3467cddeb019a7b53ec632f834b6a9239
   v5.7-rc1
   v5.7

2a4b03ffc69f2ded 1567c3e3467cddeb019a7b53ec6                    v5.7-rc1 
                        v5.7
---------------- --------------------------- --------------------------- 
---------------------------
          %stddev     %change         %stddev     %change 
%stddev     %change         %stddev
              \          |                \          |                \ 
         |                \
     211462           -16.0%     177702           -15.0%     179809 
      -15.1%     179510        vm-scalability.median
       5.34 ±  9%      -3.1        2.23 ± 11%      -2.9        2.49 ± 
5%      -2.7        2.61 ± 11%  vm-scalability.median_stddev%
   30430671           -16.3%   25461360           -15.5%   25707029 
      -15.5%   25701713        vm-scalability.throughput
  7.967e+09           -11.1%  7.082e+09           -11.1%  7.082e+09 
      -11.1%  7.082e+09        vm-scalability.workload



On 4/16/2020 2:20 PM, Giovanni Gherdovich wrote:
> On Thu, 2020-04-16 at 14:10 +0800, Xing Zhengjun wrote:
>> Hi Giovanni,
>>
>>     1567c3e346("x86, sched: Add support for frequency invariance") has
>> been merged into Linux mainline v5.7-rc1 now. Do you have time to take a
>> look at this? Thanks.
>>
> 
> Apologies, this slipped under my radar. I'm on it, thanks.
> 
> 
> Giovanni Gherdovich
> 

-- 
Zhengjun Xing