Messages in this thread | | | Date | Fri, 7 May 1999 00:08:10 +0200 (CEST) | From | Andrea Arcangeli <> | Subject | Re: Overscheduling DOES happen with high web server load. |
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On Thu, 6 May 1999, Kurt Garloff wrote:
>On Thu, May 06, 1999 at 05:39:35PM +0200, Andrea Arcangeli wrote: >> On Wed, 5 May 1999, Phillip Ezolt wrote: >> > >> >In doing some performance work with SPECWeb96 on ALpha/Linux with apache, >> >it looks like "schedule" is the main bottleneck. >> >> Alt. Alpha uses HZ at 1024 so you get a scheduling rate by default 10 >> times higher than in all other archs. > From what I understand, the scheduling is not caused by the timer but by >blocking and woken processes.
Yes: reschedule_idle() is the culprit. I think we should simply use goodness() in reschedule_idle() (instead of checking `->counter + 3 ... ->counter') to avoid overscheduling (or better "what I call overscheduling" ;).
Andrea Arcangeli
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