cpufreq on VIA C7

[Harald Schmalzbauer]

Uwe Grohnwaldt schrieb am 01.08.2009 01:49 (localtime):
> Hi,
> 
> disabling cpufreq in the kernel configfile works fine. after that it 
> looks fine:
> dev.cpu.0.freq_levels: 2000/20000 1000/10000 800/8000 400/4000

This is done by throttling. Unfortunately it doesn't safe power for me, 
at least on my E8400 the power consumption raises about a hardly 
measureable bit.
If I'm right the C7 (Eden V4, Esther in my case) supports enhanced speed 
stepping. I can enable it in my BIOS (along with SpeedStep1) which 
should enable the cpu to operate with 0.884 Volt. This would safe 
enourmous power.
Unfortunately I can't hack the est driver to attach to C7.
Any volunteers? :)

Best regards,

-Harry

P.S.: I'll do some measurings regarding the throttling on the C7 to 
verify disabling throttling is the right thing ;)

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 196 bytes
Desc: OpenPGP digital signature
Url : http://lists.freebsd.org/pipermail/freebsd-current/attachments/20090802/3056d1ce/signature.pgp