linux-kernel - [lkp] [mm] 6f25a14a70: will-it-scale.scalability -4.0% regression

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Date:	Thu, 7 Apr 2016 09:06:57 +0800
From:	kernel test robot <xiaolong.ye@...el.com>
To:	Xishi Qiu <qiuxishi@...wei.com>
Cc:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	Joonsoo Kim <js1304@...il.com>,
	David Rientjes <rientjes@...gle.com>,
	Laura Abbott <lauraa@...eaurora.org>,
	Hui Zhu <zhuhui@...omi.com>,
	Wang Xiaoqiang <wangxq10@....edu.cn>,
	LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [lkp] [mm] 6f25a14a70: will-it-scale.scalability -4.0% regression

FYI, we noticed that will-it-scale.scalability -4.0% regression on

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit 6f25a14a7053b69917e2ebea0d31dd444cd31fd5 ("mm: fix invalid node in alloc_migrate_target()")


=========================================================================================
compiler/cpufreq_governor/kconfig/rootfs/tbox_group/test/testcase:
  gcc-4.9/performance/x86_64-rhel/debian-x86_64-2015-02-07.cgz/lkp-ivb-d03/pthread_mutex1/will-it-scale

commit: 
  969e8d7e47f93ef693028667480558de8f70523f
  6f25a14a7053b69917e2ebea0d31dd444cd31fd5

969e8d7e47f93ef6 6f25a14a7053b69917e2ebea0d 
---------------- -------------------------- 
       fail:runs  %reproduction    fail:runs
         %stddev     %change         %stddev
             \          |                \  
 2.032e+08 ±  0%      -1.6%      2e+08 ±  0%  will-it-scale.per_process_ops
      0.83 ±  0%      -4.0%       0.79 ±  0%  will-it-scale.scalability
    214103 ± 14%     -20.2%     170884 ± 14%  sched_debug.cpu.ttwu_count.stddev
      3789 ±  7%     -10.3%       3398 ±  6%  slabinfo.anon_vma_chain.active_objs
      4660 ±  5%      +7.7%       5019 ±  2%  vmstat.system.in


lkp-ivb-d03: Ivy Bridge
Memory: 4G



To reproduce:

        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml


Disclaimer:
Results have been estimated based on internal Intel analysis and are provided
for informational purposes only. Any difference in system hardware or software
design or configuration may affect actual performance.


Thanks,
Xiaolong Ye

View attachment "job.yaml" of type "text/plain" (3497 bytes)

View attachment "reproduce" of type "text/plain" (437 bytes)