On Thu, 2008-02-28 at 15:52 +0100, Martin Wilck wrote:
> Hi Tim,
> 
> here  is what I found in my experience:
> 
> > 1. Employ a tickless kernel, probably a kernel close to 2.6.24.
> 
> This has very little effect, because C-states have little effect on this
> processor.

Do you mean your processor don't have higher level C-states as seen in
/proc/acpi/processor/CPU*/power?  Some older versions of Clovertown and
Harpertown do no have support.


> 
> This was the key for better savings in the intermediate load range. I
> don't have the numbers here right now, but it's around 10W at loadlevels
> 20%-60%. Thanks a lot! It even helped the benchmark result by improving
> the maximum throughput by ~1%, which is very important for the final
> benchmark result. I got the same benchmark result as under Windows now,
> despite a slightly lower max throughput.
> 

Great.  Good to know it helps on your side.

Tim

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