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SubjectRe: >10% performance degradation since 2.6.18
On Fri, 3 Jul 2009 21:54:58 +0200
Andi Kleen <> wrote:

> > That would seem to be a fruitful avenue of
> > investigation -- whether limiting the cards to a single RX/TX
> > interrupt would be advantageous, or whether spreading the eight
> > interrupts out over the CPUs would be advantageous.
> The kernel should really do the per cpu binding of MSIs by default.

... so that you can't do power management on a per socket basis?
hardly a good idea.

just need to use a new enough irqbalance and it will spread out the
interrupts unless your load is low enough to go into low power mode.

Arjan van de Ven Intel Open Source Technology Centre
For development, discussion and tips for power savings,

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