> On Mon, 27 Sep 1999 22:11:38 -0400 (EDT), "Richard B. Johnson"
> <root@chaos.analogic.com> wrote:
>
> >On Mon, 27 Sep 1999, Robert Redelmeier wrote:
> >
> >> While trying to determine kernel overhead, I wrote a small pgm
> >> (below) using `rdtsc` to figure out kernel interrupts. I get
> >> some strange results:
> >>
> >> 1) 500 interrupts take 5 seconds. No surprise there. Except
> >> on SMP (& FreeBSD2.2.8) systems, where they only take
> >> ~2.7 seconds. Are these spurrious interrupts? Or SMP?
>
> 500/5 = 100 = default HZ... so maybe you were interrupted 100 times a
> second.
>
Maybe 1 - 2 thousand times per second if your ethernet card is plugged
into a network.
Cheers,
Dick Johnson
**** FILE SYSTEM WAS MODIFIED ****
Penguin : Linux version 2.3.13 on an i686 machine (400.59 BogoMips).
Warning : It's hard to remain at the trailing edge of technology.
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