Messages in this thread | | | Subject | Re: PATCH 2.3.26: kmalloc GFP_ZERO | From | Jes Sorensen <> | Date | 09 Nov 1999 18:00:49 +0100 |
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>>>>> "yodaiken" == yodaiken <yodaiken@chelm.cs.nmt.edu> writes:
yodaiken> On Tue, Nov 09, 1999 at 05:17:30PM +0100, Jes Sorensen yodaiken> wrote: yodaiken> PPC turns cache off and zeros during idle task. This is a yodaiken> major performance win. We measured. >> And Jakub just told us it wasn't a win under the same conditions >> on the Sparc64.
yodaiken> It depends on how you do it, on the architecture, and on yodaiken> what you measure. Lmbench is an invaluable hint, but it is yodaiken> not definitive. If kernel compiles speed up by 20%, you yodaiken> knpw something.
Now DaveM already posted good reason why lmbench was a bad bench for this ... now did you in fact see a 20% speedup on kernel compiles? I for some reason strongly doubt that.
Jes
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