Re: Feature request

[Viktor Radnai <efti@gotiao.com>]

Dominik Brodowski wrote:
> Oh well, so users want to use 150 MHz instead of 1600 MHz now...
My laptop is still quite responsive at 150MHz and anything that lets me 
conserve battery power when the performance isn't needed is worth 
trying. After all, this is the very purpose of frequency scaling. It 
doesn't really matter how fast the kernel executes idle loops ;)

> In fact, I have some ideas to allow same-time usage of a 
> 	throttling
> and a
> 	frequency and voltage scaling
> driver. But IMHO NOT for 2.4. and NOT for 2.6. It's something which might be
> worthy of discussion for 2.7.
That would be great, too bad that it won't happen sooner. In the 
meantime, do you think that the method described below is an acceptable 
way of saving power or do you foresee any potential problems / 
instability as a result of this?

If you think that this is a workable method then I might hack one of the 
userspace frequency scaling utilities to support this method.

Cheers,
Vik

> On Sat, Aug 23, 2003 at 08:50:03PM +1000, Viktor Radnai wrote:
> 
>>Hi all,
>>
>>I wonder if it would be possible to modify the cpufreq driver modules so
>>that more than one could be loaded at the same time (speedstep-ich and
>>p4-clockmod are good examples). Perhaps change the location of the
>>cpufreq virtual files from /sys/devices/system/cpu/cpu0/cpufreq/ to
>>/sys/devices/system/cpu/cpu0/cpufreq/<modulename>/ ?
>>
>>Cheers,
>>Vik
>>
>>Viktor Radnai wrote:
>>
>>>Hi Martin,
>>>
>>>I've managed to clock down my 2GHz Pentium 4m to around 150MHz by doing 
>>>the following:
>>>
>>>- compile both speedstep and p4-clockmod as modules
>>>- modprobe speedstep
>>>- set the governor to powersave
>>>- rmmod speedstep
>>>- modprobe p4-clockmod
>>>- set the CPU speed
>>>
>>>Hope this helps,
>>>
>>>Vik
>>>
>>>Martin Klinkigt (multimedia-test) wrote:
>>>
>>>
>>>>Hello,
>>>>I has a Pentium 4 m and the 2.4.21 Kernel with cpufreq-2.4.21-2. Now I 
>>>>can change the frequency in each case between 1,2 and 1,6 Ghz.
>>>>Under Windows I had it however already on 400 MHz.
>>>>
>>>>Can I change it somehow that he is further as 1.2 Ghz down? 
>>>>Thanks
>>>>Martin
> 
> 
>