Re: Which cpufreq driver is best for ...

[Dominik Brodowski <linux@brodo.de>]

On Thu, Sep 04, 2003 at 11:59:35AM +0200, Norbert Preining wrote:
> On Don, 04 Sep 2003, Dominik Brodowski wrote:
> > > Using p4-clockmod the normal ACPI idle will reduce the CPU frequency?
> > > Interesting, I have to try this.
> > 
> > Not really "reduce" it, but "stop" it for certain periods of time.
> 
> So I cannot observe this, or? cat /proc/cpuinfo usually shows me the
> current cpu freq. With this behaviour it is just a thing of `feeling'
> cooler.

Yes, you cannot observe this.

> > > > a) The idling mechansim is broken.
> > > 
> > > How can I check this?
> > 
> > a) Do nothing on your notebook for a while. Does it heat up much? 
> > b) check /proc/acpi/processor/*/power whether C1 and C2 are used. C3 would
> > be even better.
> 
> Hmmm:
> [~] cat /proc/acpi/processor/CPU0/power 
> active state:            C1
> default state:           C1
> bus master activity:     00000000
> states:
>    *C1:                  promotion[--] demotion[--] latency[000] usage[00000000]
>     C2:                  <not supported>
>     C3:                  <not supported>
> Anything I can do to make C2 (and C3) work?

please send me a dmesg and /proc/pci [off-list].

	Dominik