Messages in this thread | | | Date | Fri, 08 Jul 2005 16:14:59 -0700 | From | "Martin J. Bligh" <> | Subject | Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt |
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--On Friday, July 08, 2005 16:03:03 -0700 Chris Wedgwood <cw@f00f.org> wrote:
> On Fri, Jul 08, 2005 at 03:59:35PM -0700, Martin J. Bligh wrote: > >> I think we're talking between 2.6.12-git5 and 2.6.12-git6 right? I >> can confirm more explicitly if really need be. 48s -> 45.5s elapsed. > > That's a huge difference (5%) --- what hardware is that on?
16 CPU x440 (about a 2-3 year old NUMA box). flat 4x seems about a 1% gain, still statistically significant, but definitely smaller.
I'm not saying there isn't data supporting higher HZ ... I just haven't seen it published. I get the feeling what people really want is high-res timers anyway ... high HZ is just concealing the issue and making it slightly less crap, not actually fixing it.
M.
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