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SubjectRe: 2.6.15-ck1
On Thu, 5 Jan 2006 12:22 pm, Andi Kleen wrote:
> Arjan van de Ven <> writes:
> > sounds like we need some sort of profiler or benchmarker or at least a
> > tool that helps finding out which timers are regularly firing, with the
> > aim at either grouping them or trying to reduce their disturbance in
> > some form.
> I did one some time ago for my own noidletick patch. Can probably dig
> it out again. It just profiled which timers interrupted idle.
> Executive summary for my laptop: worst was the keyboard driver (it ran
> some polling driver to work around some hardware bug, but fired very
> often) , followed by the KDE desktop (should be mostly
> fixed now, I complained) and the X server and some random kernel
> drivers.
> I haven't checked recently if keyboard has been fixed by now.

I checked with Vojtech some time ago and he said we could change the polling
from HZ/20 to about HZ/5 which I have included in the rolled up dynticks
patch already. Not that 20 HZ is very frequent, but anything that splits up
timer intervals potentially by 20 more adds up.

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