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SubjectRe: LMbench2.0 results
Hi!

> > > > Comments?
> > >
> > > Yeah: "ouch" because I don't see a single category that's faster.
> >
> > HZ went to 1000, which should help multimedia latencies a lot.
>
> It shouldn't materially damage performance unless we have other things
> extremely wrong. Its easy enough to verify by putting HZ back to 100 and
> rebenching

1000 times per second, enter timer interrupt, acknowledge it, exit
interrupt. Few i/o accessess, few tlb entries kicked out, some L1
cache consumed?

Is 10usec per timer interrupt reasonable on modern system? That's 10
msec per second spend in timer with HZ=1000, thats 1% overall. So it
seems to me it is possible for HZ=1000 to have performance impact...

Pavel

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