RFC: powerd algorithms enhancements

[Alexandre "Sunny" Kovalenko]

On Tue, 2008-11-11 at 15:56 -0200, Nenhum_de_Nos wrote:
> On Tue, November 11, 2008 3:20 am, Ian Smith wrote:
> > On Mon, 10 Nov 2008, Nenhum_de_Nos wrote:
> >  > as all you are talking about the subject, and I read all messages, is
> >  > there any module to load and make my AthlonXP 1700+ use less power ?
> >  >
> >  > running 7-STABLE, just a file server. any acpi-stuff I could enable
> > would
> >  > be great, as I just use all its power when compiling ...
> >
> > What does 'sysctl hw.acpi dev.cpu' have to say?
> 
[...]
> [root at xxx ~]# sysctl dev.cpu
> dev.cpu.0.%desc: ACPI CPU
> dev.cpu.0.%driver: cpu
> dev.cpu.0.%location: handle=\_PR_.CPU0
> dev.cpu.0.%pnpinfo: _HID=none _UID=0
> dev.cpu.0.%parent: acpi0
> dev.cpu.0.cx_supported: C1/0 C2/90 C3/900
> dev.cpu.0.cx_lowest: C1
> dev.cpu.0.cx_usage: 100.00% 0.00% 0.00%
> [root at xxx ~]#
> 
> if it rings any bells :)
All I can suggest here is 

sysctl dev.cpu.0.cx_lowest="C3"

or, if it gets you totally unresponsive machine, 

sysctl dev.cpu.0.cx_lowest="C2"

how much of the power saving you will see from this is the
separate question.

-- 
Alexandre "Sunny" Kovalenko (Олександр Коваленко)