linux-kernel - [lkp] [block] fbccf1df065: +276.3% boot-meminfo.KernelStack

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Date:	Mon, 01 Jun 2015 09:46:02 +0800
From:	Huang Ying <ying.huang@...el.com>
To:	Kent Overstreet <kent.overstreet@...il.com>
Cc:	Ming Lin <mlin@...nel.org>, LKML <linux-kernel@...r.kernel.org>,
	LKP ML <lkp@...org>,
	"huang.ying.caritas" <huang.ying.caritas@...il.com>
Subject: [lkp] [block] fbccf1df065: +276.3% boot-meminfo.KernelStack

FYI, we noticed the below changes on

git://git.kernel.org/pub/scm/linux/kernel/git/mlin/linux.git block-generic-req
commit fbccf1df06574add60bdb71103cc1662e477f02d ("block: make generic_make_request handle arbitrarily sized bios")


testcase/path_params/tbox_group: boot/1/vm-kbuild-1G

        v4.1-rc4  fbccf1df06574add60bdb71103  
----------------  --------------------------  
         %stddev     %change         %stddev
             \          |                \  
      1587 ±  7%    +276.3%       5972 ±  1%  boot-meminfo.KernelStack
    152390 ±  0%      +4.8%     159697 ±  0%  boot-slabinfo.num_objs
     10149 ±  0%     +15.8%      11750 ±  0%  boot-slabinfo.num_pages
     35916 ±  5%     +18.0%      42368 ±  9%  boot-meminfo.DirectMap4k
    478516 ±  0%      -1.9%     469269 ±  0%  boot-meminfo.MemFree
     11477 ±  0%     +49.1%      17111 ±  1%  boot-meminfo.SUnreclaim
     40551 ±  0%     +15.7%      46910 ±  0%  boot-meminfo.Slab

vm-kbuild-1G: qemu-system-x86_64 -enable-kvm -cpu Haswell,+smep,+smap
Memory: 1G

                             boot-meminfo.KernelStack

  7000 ++-------------------------------------------------------------------+
       |        O         O                           O               O     |
  6000 O+ O  O      O  O     O  O  O  O   O  O  O  O     O  O  O   O     O  O
       |                                                                    |
  5000 ++                                                                   |
       |                                                                    |
  4000 ++                                                                   |
       |                                                                    |
  3000 ++                                                                   |
       |                                                                    |
  2000 ++                          *..                                      |
       *            *..*..*..*    :   *                                     |
  1000 ++         ..          +   :                                         |
       | +       .             + :                                          |
     0 ++-*--*--*---------------*-------------------------------------------+

	[*] 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
-------------------------------------
lkp@...ists.intel.com
https://eclists.intel.com/sympa/info/lkp
Unsubscribe by sending email to sympa@...ists.intel.com with subject "Unsubscribe lkp"


View attachment "job.yaml" of type "text/plain" (2539 bytes)