linux-kernel - [LKP] [ftrace] fef5aeeee9e: -27.2% boot-slabinfo.num

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Message-ID: <1419304217.26403.44.camel@intel.com>
Date:	Tue, 23 Dec 2014 11:10:17 +0800
From:	Huang Ying <ying.huang@...el.com>
To:	"Steven Rostedt (Red Hat)" <rostedt@...dmis.org>
Cc:	LKML <linux-kernel@...r.kernel.org>, LKP ML <lkp@...org>
Subject: [LKP] [ftrace] fef5aeeee9e: -27.2% boot-slabinfo.num_objs

FYI, we noticed the below changes on

commit fef5aeeee9e3717e7aea991a7ae9ff6a7a2d4c85 ("ftrace: Replace tramp_hash with old_*_hash to save space")


testbox/testcase/testparams: vm-kbuild-4G/boot/1

e1effa0144a1ddf5  fef5aeeee9e3717e7aea991a7a  
----------------  --------------------------  
         %stddev     %change         %stddev
             \          |                \  
    437752 ±  0%     -27.2%     318545 ±  0%  boot-slabinfo.num_objs

vm-kbuild-4G: qemu-system-x86_64 -enable-kvm
Memory: 4G



                               boot-slabinfo.num_objs

  440000 *+*--*-*-*------*----*-*-*--*--------*-*--*-*-*--*-----------------+
         |           *.*   *.          *.*..*                               |
  420000 ++                                                                 |
         |                                                                  |
  400000 ++                                                                 |
         |                                                                  |
  380000 ++                                                                 |
         |                                                                  |
  360000 ++                                                                 |
         |                                                                  |
  340000 ++                                                                 |
         |                                                                  |
  320000 O+O  O   O  O O O O  O O O  O O    O O O    O O  O O O O  O O O  O O
         |      O                        O         O                        |
  300000 ++-----------------------------------------------------------------+

	[*] 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" (1154 bytes)

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