Messages in this thread | | | Date | Tue, 28 Dec 2004 09:53:48 -0200 | From | Marcelo Tosatti <> | Subject | Re: Prezeroing V2 [0/3]: Why and When it works |
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On Mon, Dec 27, 2004 at 02:50:57PM -0800, David S. Miller wrote: > On Fri, 24 Dec 2004 10:21:24 -0800 (PST) > Linus Torvalds <torvalds@osdl.org> wrote: > > > Absolutely. I would want to see some real benchmarks before we do this. > > Not just some microbenchmark of "how many page faults can we take without > > _using_ the page at all". > > Here's my small contribution. I did three "make -j3 vmlinux" timed > runs, one running a kernel without the pre-zeroing stuff applied, > one with it applied. It did shave a few seconds off the build > consistently. Here is the before: > > real 8m35.248s > user 15m54.132s > sys 1m1.098s > > real 8m32.202s > user 15m54.329s > sys 1m0.229s > > real 8m31.932s > user 15m54.160s > sys 1m0.245s > > and here is the after: > > real 8m29.375s > user 15m43.296s > sys 0m59.549s > > real 8m28.213s > user 15m39.819s > sys 0m58.790s > > real 8m26.140s > user 15m44.145s > sys 0m58.872s
Christopher and other SGI fellows,
Get your patch into STP, once its there we can do some wider x86 benchmarking easily.
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