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Suppose there is no CPU power management mechanism deployed in a server, and i run a job on it and monitoring the power drawn by the server by using a wall power meter, what kind of a profile do you expect when you plot a graph of power vs time ? (assume the wall power meter readings can be recoreded in a file)

Will the power values of the wall power meter vary as a function of the CPU utilization even when there is no power management mechanism deployed in the server ?

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More than likely "yes" with most modern processors, but that will vary on the engineered power management features of the processor itself.

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@user48838: so, if there is no power management enabled for CPU, the meter readings will not be affected by variation in CPU utlization . correct ? –  kashyapa Oct 29 '10 at 21:13
    
That's probably the case for the older processors, not sure if the power management can be completely disabled with a lot of the newer ones. In a lot of "modern" systems, there is usually more than the CPU within a system - e.g. GPU on the video cards can also be in play too. –  user48838 Oct 29 '10 at 21:21
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