[CentOS] Power consumption monitoring

Hi,

I have quite a few low-end development/test servers running continuously and I would like to better manage their power consumption. I have found interesting information on how to perform CPU scaling (e.g. [1] or [2]).

But I cannot find if there is a way to (software) monitor power consumption on CentOS (or other such data like CPU temperature, fan speed etc.).

What I read so far is that support is quite limited in this kernel (e.g. PowerTop not providing useful information).

Before I start tuning I would like to be able to measure whether my changes are having any impact at all.

Thanks in advance,

Mathieu

[1] http://www.lesswatts.org/tips/cpu.php [2] http://www.spencerstirling.com/computergeek/powersaving.html