Re: [PATCH 1/1] SGI X86 UV: Provide a System Activity Indicator driver

From: Pavel Machek
Date: Thu Oct 02 2008 - 04:37:23 EST


> Pavel Machek wrote:
> >> Another relevant point is that I will be adding a bit more functionality
> >> to disable the timer interrupt on truly "idle" cpus (like have been idle
> >> for some amount of seconds). We would then use the "exit from idle"
> >> callback to reestablish the timer interrupt. [This would allow them to
> >> enter power down states if appropriate.]
> >
> > Should you look at nohz instead of reinventing it?
>
> Thanks, I did look at it. Quite complex. Maybe I'm missing something
> but I don't see how it fits in? Are you saying I should be using

I seen your remark above about disabling timer interrupt on idle
cpus. That's exactly nohz functionality, right? Maybe I misunderstood
you and you meant "my monitoring interrupt" and not "generic system
timer interrupt"?

Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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