[lkp] [mm] 55834c5909: boot-slabinfo.num_objs +31.9% increasement

* [lkp] [mm] 55834c5909: boot-slabinfo.num_objs +31.9% increasement
@ 2016-05-30  2:17 kernel test robot
  2016-05-30  7:53 ` Dmitry Vyukov
  0 siblings, 1 reply; 3+ messages in thread
From: kernel test robot @ 2016-05-30  2:17 UTC (permalink / raw)
  To: Alexander Potapenko
  Cc: Linus Torvalds, Christoph Lameter, Pekka Enberg, David Rientjes,
	Joonsoo Kim, Andrey Konovalov, Dmitry Vyukov, Andrey Ryabinin,
	Steven Rostedt, Konstantin Serebryany, Dmitry Chernenkov,
	Andrew Morton, LKML, lkp

FYI, we noticed boot-slabinfo.num_objs +31.9% increasement due to commit:

commit 55834c59098d0c5a97b0f3247e55832b67facdcf ("mm: kasan: initial memory quarantine implementation")
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

in testcase: boot
on test machine: vm-lkp-wsx03-2G: 2 threads qemu-system-x86_64 -enable-kvm -cpu host with 2G memory
with following parameters: sleep=1

Details are as below:
-------------------------------------------------------------------------------------------------->

=========================================================================================
compiler/kconfig/rootfs/sleep/tbox_group/testcase:
  gcc-6/x86_64-randconfig-s4-05280557/debian-x86_64-2015-02-07.cgz/1/vm-lkp-wsx03-2G/boot

commit: 
  b8f1a75d61d8405a753380c6fb17ba84a5603cd4
  55834c59098d0c5a97b0f3247e55832b67facdcf

b8f1a75d61d8405a 55834c59098d0c5a97b0f3247e 
---------------- -------------------------- 
         %stddev     %change         %stddev
             \          |                \  
    165450 ±  0%     +31.9%     218176 ±  1%  boot-slabinfo.num_objs
     19095 ±  5%    +104.3%      39013 ±  3%  boot-slabinfo.num_pages
    107.27 ±  2%     +14.1%     122.43 ± 13%  boot-time.boot
     97.13 ±  1%      +4.3%     101.31 ±  1%  boot-time.idle
   1105076 ±  0%      -7.2%    1025056 ±  0%  boot-meminfo.MemFree
     36269 ± 12%    +215.7%     114517 ±  5%  boot-meminfo.SUnreclaim
     76469 ±  5%    +104.5%     156343 ±  4%  boot-meminfo.Slab

                               boot-slabinfo.num_objs

  230000 ++-----------------------------------------------------------------+
         |            O                 O                                   |
  220000 ++O O    O OO OO     O O OO OO                                     |
         OO O OOOO O     OOOOOOO O  O OO O                                  |
  210000 ++                                                                 |
         |                                                                  |
  200000 ++                                                                 |
         |                                                                  |
  190000 ++                                                                 |
         |                                                                  |
  180000 ++                                                                 |
         |                                                                  |
  170000 ++                                                                 |
         ********************************************************************
  160000 ++-----------------------------------------------------------------+

                               boot-slabinfo.num_pages

  45000 ++-------------O----------------------------------------------------+
        | O  O      OO O O O O  OOO                                         |
  40000 +O   OOO OO                OO O  O                                  |
        O  OO      O  O O O O  OO    O  O                                   |
        |       O             O        O                                    |
  35000 ++                                                                  |
        |                                                                   |
  30000 ++                                                                  |
        |                                                                   |
  25000 ++                                                                  |
        |                                                                   |
        |                                                         *    *    *
  20000 +* *  *  ** * *  *   * *  *   ** **** ** * *  *   * *  *  :: * *** *|
        * * ** **  * * ** *** * ** ***  * *  *  * * ** *** * ** ** ** *   * |
  15000 ++------------------------------------------------------------------+

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

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

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