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SubjectRe: High pitched noise from laptop: processor.c in linux 2.6
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On Sat, 2004-10-16 at 17:46, Alan Cox wrote:
> On Sad, 2004-10-16 at 20:52, Lee Revell wrote:
> > > What benefits? HZ=1000 takes 1W more on my system.
> > Better timer resolution?
>
> And heavily reduced accuracy on a lot of laptops where 1000Hz
> is enough to make the clock slide every time the battery state is
> queried or an SMM event triggers.
>

Wouldn't such a laptop be horribly broken? 1ms is a LONG time to
disable interrupts. That's millions of CPU cycles...

> Getting the best of both worlds depends on the stuff discussed at OLS
> being finished, then you can have 1Khz accurancy and battery life
>

I was not there but I imagine this involves a way to get 1khz accuracy
with a 100Hz timer interrupt rate?

Lee

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