AMD Athlon64 cool'n quiet - questions

[Alexander Dalloz]

Am Mo, den 21.03.2005 schrieb Alexander Volovics um 12:22:

> The 'AMD Athlon64 qool'n quiet - how?' thread reminded me that there
> are some questions that I would like to ask about 'cool/quiet',
> 'cpufreq/cpuspeed' and/or 'powernow-k8'.
> 
> (I am running FC3-x86_64 on a MSI K8N Neo2 Platinum mobo with AMD64 3500+).
> 
> 'dmesg' shows the following:
> powernow-k8: Found 1 AMD Athlon 64 / Opteron processors (version 1.00.09e)
> powernow-k8:    0 : fid 0xe (2200 MHz), vid 0x2 (1500 mV)
> powernow-k8:    1 : fid 0xc (2000 MHz), vid 0x6 (1400 mV)
> powernow-k8:    2 : fid 0xa (1800 MHz), vid 0xa (1300 mV)
> powernow-k8:    3 : fid 0x2 (1000 MHz), vid 0x12 (1100 mV)
> 
> However I have only ever seen 2 freqencies in use: 1000 and 2200.
> 
> This could because 1800/2000 are excluded from use somewhere or
> because they are 'transient states', only used when switching from
> 1000 to 2200.
> 
> If 'cpuspeed' is responsible for this "exclusion" of 1800 and 2000
> it doesn't seem to be configured in /etc/cpuspeed.conf.
> (Or can the OPTS entry be used for this?)
> 
> Can somebody explain this phenomenon.

cpuspeed reads the CPUID from the BIOS table. Maybe Dave can say more
about this as he coded this software.

> (I might not be seeing the actual workings of cpuspeed because
>  I only use 'cat /proc/cpuinfo' manually)

I think you either don't use your CPU so that it idles at 1GHz, or you
use it full speed at 2.2GHz.

> Ubuntu Warty has a 'cpufreq' button for use on the panel.
> Is there anything like this available for FC3/FC4?

http://dag.wieers.com/packages/gnome-cpufreq-applet/

> Alexander

Alexander 2 :-)


-- 
Alexander Dalloz | Enger, Germany | GPG http://pgp.mit.edu 0xB366A773
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Fedora Core 2 GNU/Linux on Athlon with kernel 2.6.10-1.770_FC2smp 
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