Re: Measured overhead of timer interrupts

Artur Skawina (skawina@geocities.com)
Mon, 19 Jul 1999 19:41:00 +0200


Jamie Lokier wrote:

> Ok, I just measured it, and it is more than I expected. The code is
> attached at the end. (You can use it for measuring other interrupt

> Extrapolating to 1024Hz, expect 1.4566% time to go servicing the timer
> interrupts.
>
> Quite how this translates to "reasonable 486+ its definitely a non
> issue" I can't see. Maybe 486s are faster than Pentium IIs?

what i would be interested in seeing is: the time it takes to
run a cpu bound app (eg raytracing am image) with HZ=100 and HZ=1024.
That would give a more realistic approximation of the overhead that
increasing HZ adds.

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