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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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||
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