Re: dynamic-hz

Lee Revell
2004-12-14T22:53:08Z

On Wed, 2004-12-15 at 09:40 +1100, Con Kolivas wrote:
> Lee Revell writes:
>
> > On Mon, 2004-12-13 at 10:36 +1100, Con Kolivas wrote:
> >> The performance benefit, if any, is often lost in noise during
> >> benchmarks and when there, is less than 1%.
> >
> > I have measured 2.1-2.3% residency for the timer ISR on my 600Mhz VIA
> > C3. And this is a desktop - you have many many embedded systems that
> > are slower. For these systems the difference is very real.
>
> Could you explain residency and it's relevance to throughput please? I've
> not heard this term before.
>

It means 2.1-2.3% of wallclock time is spent running the timer interrupt
handler. IOW, it runs for 21-23 usecs, 1000x per second.

Lee