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SubjectRe: [PATCH][2.5.32] CPU frequency and voltage scaling (0/4)
Linus Torvalds wrote:
>
> In article <1030618420.7290.112.camel@irongate.swansea.linux.org.uk>,
> Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
> >> { min-Hz, max-Hz, policy }
> >>
> >
> >For a few of the processors "event-hz" or similar would be nice. The
> >Geode supports hardware assisted bursting to full processor speed when
> >doing SMM, I/O and IRQ handling.
>
> Hmm.. I would assume that you'd just use the high frequency for that?
> So, for example, assuming you have a 600/300 Geode, when you do
>
> { 0, ~0UL, "power-save" }
>
> that would tell the Geode driver to run at 300MHz normally
> ("power-save"), and at 600Mhz when doing critical events.
>
> In contrast, a
>
> { 0, ~0UL, "performance" }
>
> mode would mean that it always runs at 600MHz (modulo heat throttling,
> of course).
>
> And a
>
> { 300, 300, "power-save" }

How about { 50, 50, "power-save" } where the number refers
to percent of full?
I.e. same meaning IFF full is 600, but suppose it is 800.
> means that you want the chip to always run at 300MHz, even when handling
> critical events.
>
> I don't know the exact details of what kinds of frequencies the Geode
> supports, but it sounds to me like you don't really need another
> frequency value..
>
> Linus
> -
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--
George Anzinger george@mvista.com
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