On Fri, 2006-04-28 at 09:11 +0200, Mike Galbraith wrote:
> On Fri, 2006-04-28 at 09:56 +0400, Kirill Korotaev wrote:
> > I'm also pretty sure, that CPU controller based on timeslice tricks
> > behaves poorly on burstable load patterns as well and with interactive
> > tasks. So before commiting I propose to perform a good testing on
> > different load patterns.
>
> Yes, it can only react very slowly.
Actually, this might not be that much of a problem. I know I can
traverse queue heads periodically very cheaply. Traversing both active
and expired arrays to requeue starving tasks once every 100ms costs max
4usecs (3GHz P4) for a typical distribution.
-Mike
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