Re: CPU Frequency Scaling

[Jon Nettleton <jon nettleton gmail com>]

On Sun, 2006-12-03 at 15:58 +0100, Arjan van de Ven wrote:
> > The kernel has had the scaling governor modules for a while now and I am
> > not sure why Fedora is still relying on the cpuspeed daemon by default.
> 
> is it? Afaik most cpus actually use the ondemand governer, which lets
> the kernel do the frequency switches on demand, and quickly ;)
> Yes the enabling of this happens from the cpuspeed initscript, but the
> cpuspeed daemon isn't actually involved anymore for just about any
> modern system.
> 
> In my experience, ondemand works really well and I've not yet found that
> I wanted to override it. Maybe if you absolutely want the longest
> battery life and always want only the lowest frequency
> (but then again the frequency range is a tunable for ondemand anyway)

Looks like it is only setting up ondemand for centrino|powernow-k8,
which explains why my xp-m is left out in the cold.  Any reason why it
is limited to those two chipsets?  It would also be nice to have it read
from /etc/sysconfig so more of the governor modules can be loaded.

Jon