Re: [PATCH] small scheduling optimization

Rik van Riel (riel@humbolt.nl.linux.org)
Tue, 13 Apr 1999 15:27:26 +0200 (CEST)

On Tue, 13 Apr 1999, Ingo Molnar wrote:
> On Sun, 11 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
lot of cache corruption per second...

Rik -- Open Source: you deserve to be in control of your data.
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