Re: Slower CPU frequency reported by the kernel

[Paolo Ornati]

On Fri, 2 Feb 2007 15:03:31 +0100
"Francis Moreau" <francis.moro@xxxxxxxxx> wrote:

> it's seems that the cpu freq scaling depends on a user space tool.

Yes, it depends on the selected governor.

In the case of "userspace" governor you (or a program) can set the speed
writing to "/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed".

Usually a deamon monitor the CPU usage and increase the frequency when
you need it.


> Could you tell me how I can find if there're such tools installed on
> my computer ?

"ps -A" and look for something like "cpufreqd"

There are different deamon for this: cpufreqd, cpudyn...

Anyway it is started by an init script, so you should find it looking
at "ls /etc/init.d/".

-- 
	Paolo Ornati
	Linux 2.6.20-rc7 on x86_64
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