Messages in this thread | | | From | Con Kolivas <> | Subject | Re: dynamic-hz | Date | Mon, 13 Dec 2004 11:18:15 +1100 |
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Andrea Arcangeli writes:
> On Mon, Dec 13, 2004 at 10:36:19AM +1100, Con Kolivas wrote: >> The performance benefit, if any, is often lost in noise during >> benchmarks and when there, is less than 1%. So I was wondering if you >> had some specific advantage in mind for this patch? Is there some >> arch-specific advantage? I can certainly envision disadvantages to lower Hz. > > My last number I've here is 1% for kernel compile. We're not talking > fancy desktop stuff here, we're talking about raw computing servers that > runs in userspace 99.9% of the time where the 1% loss is going to be > multiplied dozen or hundred of times. For those HZ=1000 is a pure > tangible disavantage. > > For desktops 1% of cpu being lost is not an issue of course.
Thanks. I have to admit that the real reason I wrote this email was for this discussion to go on record so that desktop users would not get inappropriately excited by this change.
Cheers, Con
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