Re: [announce] [patch] ultra-scalable O(1) SMP and UP scheduler

From: Alan Cox (
Date: Sat Jan 05 2002 - 21:13:32 EST

> Ingo, you don't need that many queues, 32 are more than sufficent.
> If you look at the distribution you'll see that it matters ( for
> interactive feel ) only the very first ( top ) queues, while lower ones
> can very easily tollerate a FIFO pickup w/out bad feelings.

64 queues costs a tiny amount more than 32 queues. If you can get it down
to eight or nine queues with no actual cost (espcially for non realtime queues)
then it represents a huge win since an 8bit ffz can be done by lookup table
and that is fast on all processors
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