Le jeu 31/07/2003 à 17:13, Celso Gonzalez a écrit :
> Package: wnpp
> Version: unavailable; reported 2003-07-31
> Severity: wishlist
>
> * Package name : cpudyn
> Version : 0.4.0
> Upstream Author : Ricardo Galli <gallir@uib.es>
> * URL : http://mnm.uib.es/~gallir/cpudyn/
> * License : GPL
> Description : CPU dynamic frequency control
>
> cpudyn controls the speed in Intel SpeedStep, Pentium 4 Mobile,
> and PowerPC machines with the cpufreq compiled in the kernel. It saves
> battery, lowers temperature, and can put the computer disks in standby
> mode if a given period has passed without any I/O operation. It works
> well even with journaled file systems such as Ext3, XFS, or ReiserFS.
>
I don't understand why a cpufreq patch is needed for kernel. With a
recent ACPI (like in 2.4.22), you can change CPU performance (for a P4,
I don't know for PPC) like this:
glop:/tmp# cat /proc/acpi/processor/CPU0/performance
state count: 2
active state: P0
states:
*P0: 2000 MHz, 22000 mW, 250 uS
P1: 1200 MHz, 9800 mW, 250 uS
glop:/tmp# echo 1 > /proc/acpi/processor/CPU0/performance
glop:/tmp# cat /proc/acpi/processor/CPU0/performance
state count: 2
active state: P1
states:
P0: 2000 MHz, 22000 mW, 250 uS
*P1: 1200 MHz, 9800 mW, 250 uS
Why is a cpufreq patch needed for P4 processor ?
--
Cédric Delfosse, http://cedric.freezope.org
Jabber ID: cedric@jabber.debian.net
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