Messages in this thread | | | Date | Tue, 23 Dec 2014 08:32:14 -0500 | From | Steven Rostedt <> | Subject | Re: [LKP] [ftrace] fef5aeeee9e: -27.2% boot-slabinfo.num_objs |
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On Tue, 23 Dec 2014 11:10:17 +0800 Huang Ying <ying.huang@intel.com> wrote:
> 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
I have no idea what this test does. Is this good or bad? Is that -27.2% a performance regression, or memory regression?
-- Steve
> > > > 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 >
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