Messages in this thread | | | Date | Wed, 12 Mar 2003 17:40:01 -0100 | From | Dave Jones <> | Subject | Re: PowerNow!, cpufreq, and swsusp |
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On Wed, Mar 12, 2003 at 12:06:33PM -0500, Christopher Meredith wrote:
> Also, cpufreq doesn't seem to do anything. Should it be > working automatically?
no.
> Even when the machine sits unattended > for over 8 hours, the fan never turns off and the cpu > temperature is consustently 69-70 degrees C.
The kernel doesn't define policy, but exposes the necessary interface to userspace. There are a few folks working on tools / scripts to adjust the speed dynamically. look through the cpufreq mailing list archives to find them (or google)
> What must I do here?
Read Documentation/cpu-freq/user-guide.txt
short: mount sysfs, and ..
(root@evo:cpufreq)# cd /sys/class/cpu/cpufreq/cpu0/cpufreq (root@evo:cpufreq)# cat /proc/cpuinfo | grep MHz cpu MHz : 1390.536 (root@evo:cpufreq)# echo powersave >scaling_governor (root@evo:cpufreq)# cat /proc/cpuinfo | grep MHz cpu MHz : 529.728 (root@evo:cpufreq)# echo performance >scaling_governor
Dave
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