powernow-k8 and thermal / voltage data

powernow-k8 and thermal / voltage data

[Mathew Brown]

Hi,
    I have several servers with Opteron processors running RHEL v4. 
    I've successfully gotten CPU frequency scaling working (which I
    tested by looking at the cpu frequency before and during running a
    CPU intensive task).  However, there are currently 2 issues:

    1) cat /proc/acpi/thermal_zone/* is empty (there's nothing under the
    thermal_zone directory)

    2) I get the impression that the voltage doesn't change even though
    the CPU frequency changes.  Is there any way to check for this? 
    Thanks.

Thanks for your help.
-- 
  Mathew Brown
  mathewbrown@fastmail.fm

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Re: powernow-k8 and thermal / voltage data

[Dominik Brodowski]

Hi,

On Mon, Oct 16, 2006 at 06:50:02AM -0700, Mathew Brown wrote:
>     I've successfully gotten CPU frequency scaling working (which I
>     tested by looking at the cpu frequency before and during running a
>     CPU intensive task).  However, there are currently 2 issues:
> 
>     1) cat /proc/acpi/thermal_zone/* is empty (there's nothing under the
>     thermal_zone directory)

That's a BIOS issue -- if the BIOS does not expose thermal zones, then they
cannot be displayed there.


	Dominik