Re: battery life with cpufreq

Fred Blaise
2005-09-19T09:53:34Z

On 9/19/05, Dominik Brodowski <linux-X3ehHDuj6sIIGcDfoQAp7OTW4wlIGRCZ@public.gmane.org> wrote:
> Hi,
>
> On Mon, Sep 19, 2005 at 11:45:38AM +0200, Timo Hoenig wrote:
> > > ok.. So the fact that my CPU goes down to 383Mghz instead of the
> > > normal 3Ghz is not frequency scaling? (pardon the noob that I am if
> > > this question doesn't make sense)
> >
> > This is frequency scaling. But it has nothing in common with
> > throttling.
>
> No, p4-clockmod is frequency throttling or frequency modulation, but definitely
> not scaling.

Ok.. well.. speedstep* do not work here (my frequency will remain
stuck where it last was). On the other hand, p4_clockmod, i can see in
cpuinfo the frequency going up and down.

Here are the relevant modules loaded:
`--> lsmod
[...]
speedstep_lib 3940 1 p4_clockmod
cpufreq_powersave 1632 0
cpufreq_userspace 4348 0
cpufreq_ondemand 6140 0
freq_table 4004 1 p4_clockmod
[...]

So you would be saying that even though I can see the frequency change
in cpuinfo, it is kind of "lying" to me? I can feel the difference
too, when I use the laptop. It definitly has the speed of a 383Mghz
when the cpuinfo shows it at that frequency..
Thanks
> Dominik
fred