[Grml] Re: Controlling CPU Frequency
- Tong -
mlist4suntong at yahoo.com
Wed Aug 1 06:00:33 CEST 2007
On Tue, 31 Jul 2007 08:47:32 +0200, Michael Prokop wrote:
> If you want to read some docs regarding ACPI and cpufreq start for
> example with
> https://www.linux-magazine.com/issue/40/ACPI.pdf and
> https://ols2006.108.redhat.com/2007/Reprints/brown_1-Reprint.pdf and
> the docs inside Documentation/cpu-freq/ of current kernel sources.
Thanks for the info. Just finished reading them.
> To check your current settings regarding cpu frequency scaling check
> output of 'cpufreq-info'...
% cpufreq-info
cpufrequtils 002: cpufreq-info (C) Dominik Brodowski 2004-2006
Report errors and bugs to linux at brodo.de, please.
analyzing CPU 0:
no or unknown cpufreq driver is active on this CPU
,-----
| If cpufreq quits with an error message, you should first re-check that you
| have the correct cpufreq driver.
`-----
So, what cpufreq driver should I use?
> Is the 'thermal' kernel module loaded on your system?
% insmod thermal
insmod: can't read 'thermal': No such file or directory
$ dmesg | grep ^CPU0
CPU0: AMD Athlon(tm) 64 Processor 2800+ stepping 0a
,-----
| If you intend to use a kernel compiled with these features, you should use
| dmesg | grep cpufreq to check if the kernel was able to initialize the
| feature.
`-----
% dmesg | grep cpufreq || echo no found
no found
$ uname -rm
2.6.20-grml i686
> Check CPU
> temperature using tools like sensors/mbmon (depending of your
> hardware whether what's supported of course).
How would I know if my hardware is supported or not?
BTW, anybody know the 'conservative' governor?
Thanks
--
Tong (remove underscore(s) to reply)
http://xpt.sourceforge.net/techdocs/
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