Messages in this thread | | | Subject | Re: [LKP] [ftrace] fef5aeeee9e: -27.2% boot-slabinfo.num_objs | From | Huang Ying <> | Date | Mon, 29 Dec 2014 10:28:15 +0800 |
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On Tue, 2014-12-23 at 08:32 -0500, Steven Rostedt wrote: > 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?
IMO, it is good. Memory usage is reduced.
Best Regards, Huang, Ying
> -- 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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