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SubjectRe: [patch] HT scheduler, sched-2.5.68-A9

On Tue, 22 Apr 2003, Martin J. Bligh wrote:

> Hmmm. When the machine is loaded up fully, this seems OK, but for lower
> loads, it seems to have a significant degredation. This is on my normal
> 16-way machine, no HT at all ... just checking for degredations. At a
> guess, maybe it's bouncing stuff around between runqueues under low
> loads?

hm - it should not cause any change in the non-HT case. Oh, there's one
thing that could make a difference on SMP - could you change
AGRESSIVE_IDLE_STEAL back to 0?

> Are there things embedded in here that change stuff for non-HT machines?

not intentionally, but apparently there's some sort of effect. The idle
steal thing could explain it.

Ingo

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