Re: 2.6.17-rc3: cpufreq-set -g ondemand does not work
On Wed, 2006-05-17 at 10:45 +0200, Michael Schmitz wrote:
> > > speeds? The code path on the 7447A models appears to have a settle delay
> > > of 1 ms after the feature call (which boils down to an OUTB, basically),
> > > another 0.1 ms after the low_choose_7447a_dfs call which shouldn't take
> > > very long either. Am I missing something, Ben?
> >
> > I'm being over conservative bcs of the voltage change
>
> That's the 1 ms, after which the speed switch happens. Do you think the
> voltage switch actually takes longer to settle than this?
I don't have proper specs, it seems to depend on the machine. I'd rather
avoid playing wave generator with the voltage control chip though :)
> That may be right - it's probably the reason for the latency cutoff at 10
> ms. People might not be impressed if they try ondemand switching :-)
>
> Anyway: is it safe to try, or will I fry my system board?
I suppose at worse you'll lockup randomly but I can't promise :)
Ben.
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