Messages in this thread | | | Date | Thu, 5 Feb 2009 20:41:25 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH 2.6.28 1/2] memory: improve find_vma |
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* Daniel Lowengrub <lowdanie@gmail.com> wrote:
> On Sun, Feb 1, 2009 at 3:00 PM, Ingo Molnar <mingo@elte.hu> wrote: > > > > you should time it: > > > > time ./mmap-perf > > > > and compare the before/after results. > > > > Ingo > > > > I made a script that runs 'time ./mmap-perf' 100 times and outputs the > average. The output on the standard kernel was: > > real: 1.022600 > user: 0.135900 > system: 0.852600 > > The output after the patch was: > > real: 0.815400 > user: 0.113200 > system: 0.622200 > > These results were consistent which isn't surprising considering the > fact that they themselves are averages. > What do you think?
Those nymbers look very convincing to me, a cool 25.4% speedup! mmap-perf is very MM intense - including vma lookup.
Ingo
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