Messages in this thread | | | Date | Fri, 28 Apr 2006 12:13:43 +0400 | From | Kirill Korotaev <> | Subject | Re: [ckrm-tech] Re: [PATCH 0/9] CPU controller |
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>>>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.
with fair scheduling with can be a big problem, as tasks working less then a tick are hard to account :/
Thanks, Kirill
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