Messages in this thread | | | Date | Tue, 13 Apr 1999 15:42:42 +0200 (CEST) | From | Ingo Molnar <> | Subject | Re: [PATCH] small scheduling optimization |
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On Tue, 13 Apr 1999, Rik van Riel wrote:
> > > This second patch is just a small optimization to the code calling > > > the scheduling code. With a program like rc5des running (nice +19) > > > in the background and NOTHING in the foreground Linux still goes > > > through the scheduler 50 times a second! > > > > hm, it should only go 5 times a second into the scheduler if this is > > the only process running. Are you sure that it's 50 times a second? > > A nice +19 process only has a timeslice of 10 (20 if it's > alone) milliseconds. That will give 50 reschedules and a
(right.)
> lot of cache corruption per second...
what cache-corruption do you mean? There is no cache corruption if only one process is running (per CPU), and your patch has absolutely no effect when we run more than 1 nice+19 CPU-eater process.
-- mingo
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