linux-kernel - [LKP] [x86, mm] 982792c782e: -12.3% boot-meminfo.SUnreclaim

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Date:	Thu, 18 Dec 2014 16:15:47 +0800
From:	Huang Ying <ying.huang@...el.com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>, LKP ML <lkp@...org>
Subject: [LKP] [x86, mm] 982792c782e: -12.3% boot-meminfo.SUnreclaim

FYI, we noticed the below changes on

commit 982792c782ef337381e982fd2047391886f89693 ("x86, mm: probe memory block size for generic x86 64bit")

I think this is use memory size reduction, so should be a good thing.

testbox/testcase/testparams: brickland3/boot/1

c46a7c817e662a82  982792c782ef337381e982fd20  
----------------  --------------------------  
         %stddev     %change         %stddev
             \          |                \  
    128348 ±  0%     -12.3%     112541 ±  1%  boot-meminfo.SUnreclaim
    903719 ±  0%     -13.9%     778082 ±  0%  boot-slabinfo.num_objs
    169283 ±  0%      -9.7%     152819 ±  1%  boot-meminfo.Slab
     45691 ±  0%      -8.2%      41954 ±  1%  boot-slabinfo.num_pages

brickland3: Brickland Ivy Bridge-EX
Memory: 512G




                               boot-slabinfo.num_objs

  940000 ++-----------------------------------------------------------------+
  920000 ++         *.     *                                                |
         *.**.**.*. : *   + *.* .*.**. *.*.  .* .*                          |
  900000 ++        *   *.*     *      *    **  *  *                         |
  880000 ++                                                                 |
         |                                                                  |
  860000 ++                                                                 |
  840000 ++                                                                 |
  820000 ++                                                                 |
         |                                                                  |
  800000 O+    O           O                                                |
  780000 ++OO O  O OO         OO           OO    O  O  O      OO  O O OO    O
         |            OO O       O OO O  O    OO  O       O O    O       OO |
  760000 ++                 O          O              O  O                  |
  740000 ++-----------------------------------------------------------------+


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

To reproduce:

	apt-get install ruby ruby-oj
	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,
Huang, Ying


View attachment "job.yaml" of type "text/plain" (826 bytes)

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