FAO Ubuntu team : feature request : CPU frequency control ?

[David Collett]

Not necessarily...
Someone has produced a cpufreq kernel driver for the nforce2
motherboard chipset. It allows frequency scaling my modifying the FSB
rather than the CPU multiplier, so it works with regular desktop
CPU's. (the nforce2 FSB is aparently asyncronous to the PCI/AGP/RAM
clocks so this can be done on the fly quite safely) Not sure if/when
this will make it into the stock kernel but it is a patch thats
floating around (google cpufreq-nforce2). Also, I'm not sure if it
changes core voltage (i suspect not) so perhaps the cooling benefit is
not as great as the cpufreq drivers for mobile CPU's???

Dave


On Sun, 05 Dec 2004 21:29:30 +0100, Vincent Trouilliez
<vincent.trouilliez at wanadoo.fr> wrote:
> Found this 'info' file in /proc/acpi/processor/CPU0 :
> 
> ********
> vincent at Lotus-Esprit:/proc/acpi/processor/CPU0 $ head info
> processor id:            0
> acpi id:                 0
> bus mastering control:   no
> power management:        no
> throttling control:      no
> limit interface:         no
> ********
> 
> no power management and no throttling control....doesn't sound good does
> it ?? :o(
> 
> Is there a way to know what CPU supports power/frequency management ?
> I may change my motherboard sometime next year (for cheap used one off
> of Ebay ie), so I would rather try and get suitable CPU's, unless only
> the very latest and expensive CPU's support it of course, in which case
> I will wait until they become dirty cheap on the second hand market.
> 
> Vince.
> 
> 
> 
> 
> --
> ubuntu-users mailing list
> ubuntu-users at lists.ubuntu.com
> http://lists.ubuntu.com/mailman/listinfo/ubuntu-users
>