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SubjectRe: [patch] kstat change to see how much Linux SMP really scale well

On Sat, 13 Mar 1999, Andi Kleen wrote:

> > this is a non-issue, really. It simply does not happen. I've profiled a
> > slow and old dual-P100 for hours under heavy load and i never got a lost
> > SMP timer interrupt.
>
> I think it depends on the drivers. I assume your old P100 didn't have a
> polling SCSI controller that disabled local interrupts with the
> iorequest spinlock for ages.

actually it had such a beast, the biggest delay i saw was 1-2 msecs,
typically it was 100-500 usecs.

-- mingo


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