Re: [PATCH] 2.4.18 scheduler bugs

From: Joe Korty (jak@rudolph.ccur.com)
Date: Fri Mar 15 2002 - 16:59:31 EST


> > [...] But on the Athlon the IPI isnt going down a little side channel
> > between cpus.
>
> but even in the Athlon case an IPI is still an IRQ entry, which will add
> at least 200 cycles or more to the idle wakeup latency.

It is an idle cpu that is spending those 200 cycles.

Joe
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