Re: Question on CONFIG_IRQBALANCE / 2.6.x

From: Martin J. Bligh
Date: Fri Feb 18 2005 - 17:41:28 EST


>
> there's something I don't understand: With IRQBALANCE *enabled* almost
> all interrupts are processed on CPU0. This changed in an unexpected way
> after disabling IRQBALANCE: now all interrupts are distributed uniformly
> to both CPUs. Maybe it's intentional, but it's not what I expect when a
> config option named IRQBALANCE is *disabled*.
>
> Can anybody comment on this?

If you have a Pentium 3 based system, by default they'll round robin.
If you turn on IRQbalance, they won't move until the traffic gets high
enough load to matter. That's presumably what you're seeing.

m.

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