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Re: instruction cache throttling



On Sat, 2005-05-14 at 21:11 +0000, Joerg Sommer wrote:
> Joerg Sommer <joerg@alea.gnuu.de> wrote:
> > Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote:
> >>
> >>> Do you mean the powersave governor should controll this register too?
> >>> 
> >>> > I'm interested to discuss this more. I have been wanting this feature for a
> >>> > while; and even have written some code for it a couple of times, but I tend to
> >>> > get distracted too easily when it comes to hobby code.
> >>> 
> >>> Is your code anywher available?
> >>
> >> I would suggest you first write some kind of hack to control it via
> >> sysfs or /proc and do some measurements to see if there is any real
> >> benefit in throttling...
> >
> > Here is the hack http://www.minet.uni-jena.de/~joergs/ictc/. I don't know
> > if its correct, but it doesn't make the kernel oops.
> 
> I used this module today and I don't see any difference to the life
> without. I use 254 because 255 cause very high cpu load.

Did you see a significant difference in battery consumption with
different ictc values ?

Ben.




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