linux-kernel - [lkp] [mm] 089e25e502: -5.4% will-it-scale.per_process

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Date:	Wed, 23 Sep 2015 14:57:57 +0800
From:	kernel test robot <ying.huang@...el.com>
TO:	Andrea Arcangeli <aarcange@...hat.com>
CC:	LKML <linux-kernel@...r.kernel.org>
Subject: [lkp] [mm] 089e25e502: -5.4% will-it-scale.per_process_ops

FYI, we noticed the below changes on

https://git.kernel.org/pub/scm/linux/kernel/git/andrea/aa.git master
commit 089e25e5022ed5a1bb821f0c7ca6b48781ecc122 ("mm: gup: make get_user_pages_fast and __get_user_pages_fast latency conscious")


=========================================================================================
tbox_group/testcase/rootfs/kconfig/compiler/test:
  lkp-sb03/will-it-scale/debian-x86_64-2015-02-07.cgz/x86_64-rhel/gcc-4.9/futex2

commit: 
  226c833d8e769b4bb1900eaffd3efb1cbb95f820
  089e25e5022ed5a1bb821f0c7ca6b48781ecc122

226c833d8e769b4b 089e25e5022ed5a1bb821f0c7c 
---------------- -------------------------- 
         %stddev     %change         %stddev
             \          |                \  
   4287684 ±  0%      -5.4%    4055429 ±  0%  will-it-scale.per_process_ops
   1432530 ±  0%      -3.9%    1377184 ±  0%  will-it-scale.per_thread_ops
      0.60 ±  0%      -1.8%       0.59 ±  0%  will-it-scale.scalability
    142663 ± 18%    +171.2%     386864 ± 82%  cpuidle.C3-SNB.time
    220.25 ±  8%     +49.0%     328.25 ± 14%  cpuidle.C3-SNB.usage
  24244125 ± 41%     -91.9%    1963754 ±108%  cpuidle.POLL.time
    663.50 ± 12%     -77.8%     147.50 ±134%  cpuidle.POLL.usage
    344.25 ± 12%     -29.6%     242.25 ± 17%  slabinfo.kmem_cache.active_objs
    344.25 ± 12%     -29.6%     242.25 ± 17%  slabinfo.kmem_cache.num_objs
    474.00 ± 11%     -27.0%     346.00 ± 15%  slabinfo.kmem_cache_node.active_objs
    496.00 ± 10%     -25.8%     368.00 ± 14%  slabinfo.kmem_cache_node.num_objs
      1.50 ± 33%    +150.0%       3.75 ± 22%  sched_debug.cfs_rq[20]:/.nr_spread_over
      7.00 ± 58%    +285.7%      27.00 ± 35%  sched_debug.cfs_rq[25]:/.load
    151.50 ± 23%     +34.8%     204.25 ±  1%  sched_debug.cfs_rq[25]:/.util_avg
   -764780 ±-13%     -18.2%    -625478 ± -1%  sched_debug.cfs_rq[31]:/.spread0
     12046 ±  8%     -15.5%      10180 ± 14%  sched_debug.cpu#1.nr_switches
      7057 ±  8%     -33.8%       4669 ± 23%  sched_debug.cpu#10.ttwu_count
     24588 ± 17%     -31.8%      16770 ± 16%  sched_debug.cpu#11.nr_switches
     -2.50 ±-60%    -120.0%       0.50 ±223%  sched_debug.cpu#11.nr_uninterruptible
     25784 ± 16%     -29.9%      18064 ± 16%  sched_debug.cpu#11.sched_count
      1536 ± 15%    +124.0%       3441 ± 49%  sched_debug.cpu#13.ttwu_local
     -4.00 ±  0%    -106.2%       0.25 ±1479%  sched_debug.cpu#14.nr_uninterruptible
      2563 ± 42%     -50.0%       1281 ± 12%  sched_debug.cpu#16.nr_switches
      2760 ± 39%     -47.0%       1463 ± 10%  sched_debug.cpu#16.sched_count
      3.25 ±107%    -192.3%      -3.00 ±-54%  sched_debug.cpu#2.nr_uninterruptible
      2635 ± 14%     -27.0%       1923 ± 10%  sched_debug.cpu#2.sched_goidle
    957.25 ± 14%     +44.7%       1385 ± 29%  sched_debug.cpu#21.nr_switches
      1140 ± 11%     +37.3%       1566 ± 25%  sched_debug.cpu#21.sched_count
      3293 ± 64%     -49.9%       1648 ± 74%  sched_debug.cpu#23.nr_switches
      4654 ± 43%     -60.8%       1824 ± 66%  sched_debug.cpu#23.sched_count
      1595 ± 25%     +79.0%       2856 ± 25%  sched_debug.cpu#25.curr->pid
      7.00 ± 58%    +285.7%      27.00 ± 35%  sched_debug.cpu#25.load
      2.25 ±184%    -355.6%      -5.75 ±-31%  sched_debug.cpu#3.nr_uninterruptible
      1.25 ±153%    +320.0%       5.25 ± 15%  sched_debug.cpu#31.nr_uninterruptible
     24696 ± 21%     -36.6%      15662 ± 29%  sched_debug.cpu#9.nr_switches
     11398 ± 24%     -43.2%       6474 ± 30%  sched_debug.cpu#9.sched_goidle


lkp-sb03: Sandy Bridge-EP
Memory: 64G

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,
Ying Huang

View attachment "job.yaml" of type "text/plain" (3282 bytes)

View attachment "reproduce" of type "text/plain" (42 bytes)