linux-kernel - [LKP] [mm] b191f9b106e: -8.8% netperf.time.minor_page

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Date:	Wed, 01 Apr 2015 11:23:34 +0800
From:	Huang Ying <ying.huang@...el.com>
To:	Mel Gorman <mgorman@...e.de>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>, LKP ML <lkp@...org>
Subject: [LKP] [mm] b191f9b106e: -8.8% netperf.time.minor_page_faults

FYI, we noticed the below changes on

git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit b191f9b106ea1a24a711dbebb2925d3313da5852 ("mm: numa: preserve PTE write permissions across a NUMA hinting fault")


testbox/testcase/testparams: lkp-ne02/netperf/performance-300s-200%-TCP_SENDFILE

bea66fbd11af1ca9  b191f9b106ea1a24a711dbebb2  
----------------  --------------------------  
         %stddev     %change         %stddev
             \          |                \  
     13115 ±  0%      -8.8%      11968 ±  0%  netperf.time.minor_page_faults
     65.63 ±  6%     -14.6%      56.05 ±  7%  netperf.time.user_time
     65.63 ±  6%     -14.6%      56.05 ±  7%  time.user_time
    728886 ± 12%     -29.2%     516121 ± 25%  proc-vmstat.pgalloc_dma32
       259 ± 12%     -21.8%        203 ± 19%  sched_debug.cfs_rq[10]:/.tg_load_contrib
       139 ± 26%     -40.9%         82 ± 48%  sched_debug.cfs_rq[10]:/.blocked_load_avg
   1437779 ±  5%      -9.7%    1298979 ±  2%  sched_debug.cfs_rq[11]:/.max_vruntime
   1437779 ±  5%      -9.7%    1298979 ±  2%  sched_debug.cfs_rq[11]:/.MIN_vruntime
       518 ± 37%     -52.1%        248 ± 40%  sched_debug.cfs_rq[3]:/.tg_load_contrib
       117 ±  6%     +13.5%        132 ±  9%  sched_debug.cfs_rq[3]:/.load
       191 ± 28%     +71.7%        328 ± 35%  sched_debug.cfs_rq[7]:/.tg_load_contrib
    306355 ± 47%     -33.0%     205153 ±  1%  sched_debug.cpu#11.nr_switches
    306423 ± 47%     -33.0%     205208 ±  1%  sched_debug.cpu#11.sched_count
      1050 ± 13%     +59.2%       1672 ± 18%  sched_debug.cpu#15.curr->pid
      1020 ±  6%     +35.1%       1379 ±  6%  sched_debug.cpu#4.curr->pid
      1082 ± 18%     +44.5%       1563 ± 28%  sched_debug.cpu#5.curr->pid
      1215 ± 14%     -17.6%       1001 ±  7%  sched_debug.cpu#8.curr->pid

lkp-ne02: Nehalem-EP
Memory: 5G




                           netperf.time.minor_page_faults

  13400 ++---------------------------------*--------------------------------+
        |     *..      *..                :                                 |
  13200 *+. ..       ..   *..     .*..*.. :   *..*..*..*..*..     .*..*..   |
  13000 ++ *     *..*        *..*.       *                   *..*.       *..*
        |                                                                   |
  12800 ++                                                                  |
        |                                                                   |
  12600 ++                                                                  |
        |                                                                   |
  12400 ++                                                                  |
  12200 ++                                                                  |
        |                                                                   |
  12000 O+                         O          O     O  O     O              |
        |  O  O  O  O  O  O  O  O     O  O O     O        O     O           |
  11800 ++------------------------------------------------------------------+


	[*] bisect-good sample
	[O] bisect-bad  sample

To reproduce:

	apt-get install ruby
	git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
	cd lkp-tests
	bin/setup-local job.yaml # the job file attached in this email
	bin/run-local   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" (2055 bytes)

View attachment "reproduce" of type "text/plain" (2368 bytes)

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