Kai Schaetzl wrote:
I've been playing and comparing frequency scaling between AMD and Intel
CPUs yesterday and there seem to be great differences between AMD and
Intel and some gotchas. This is all on CentOS 5.2 with latest Xen kernels
(which are supposed to be powersaving-enabled since 5.2).
I was looking at cpu frequency scaling a week or two ago on an Intel
Q6600 quad core cpu. Rather than repeat myself, there are some numbers
in this thread (post #6 amongst others):
http://www.centos.org/modules/newbb/viewtopic.php?topic_id=15484&forum=37
Bottom line - the power saving between having frequency scaling enabled
or not was surprisingly small (only 2-3W). It would appear that these
processors are already fairly efficient at idle and scaling down the
frequency adds little to the overall savings that may be obtained.
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