SMP kernels on single processor machines

Benjamin Herrenschmidt benh at
Sat May 22 09:11:26 EST 2004

On Fri, 2004-05-21 at 22:58, Marius Groeger wrote:

> FWIW, CONFIG_PREEMPT _does_ reduce the avarage scheduling latency.
> It's still sort of soft real-time, but the effect is measurable (I'm
> talking 2.4 kernels here, BTW) However, on desktop systems you
> probably don need to worry about this, but for an embedded system you
> may like the slightly improved reaction time.

Well... average latency is mostly meaningless, only peak latency really
matters for anything that need some sort of real time imho...


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