Re: SMP broken on Dell PowerEdge 4100/200 under 2.6.0-testxx?

Stian Jordet
2003-12-06T05:14:16Z

lør, 06.12.2003 kl. 06.09 skrev William Lee Irwin III:
> l?r, 06.12.2003 kl. 05.54 skrev William Lee Irwin III:
> >> Okay, irqbalance has gaffed (as predicted). Could you send in
> >> /proc/cpuinfo and /var/log/dmesg?
>
> On Sat, Dec 06, 2003 at 05:57:14AM +0100, Stian Jordet wrote:
> > Here they are. Thanks for looking into this :)
>
> This tells me you're not being mistaken for HT.
>
> It also suggests it's the policy not doing what you want it to. If your
> interrupt rate isn't high (according to what metric I have no idea;
> presumably it should depend on the expense of handling it, which is
> driver-dependent but about which the code has no knowledge), it won't
> rebalance the irq's.
>
> If you actually manage to get interrupt rates exceeding its thresholds,
> you should see interrupts migrated, but only dynamically and on-demand,
> not under light usage.

I really don't know the definition of "light usage", but I'm beating the
aic7xxx and eth0 quite hard at times, without any interrupts being
migrated. Anyway, thanks :) This haven't been a problem for me so far,
and I doubt it ever will :)

Stian