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I need a CPU benchmark to test the performance impact of various power management policies. I must be able to set the load (e.g. to get a relatively steady load of 20%-30%-60%) and to simulate usage spikes (set frequency of spikes). I would also like it to be scriptable so as to be able to change benchmark settings in an indirect manner. I will be using Windows Server 2003.

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Knowing the operating system you wish to perform these tests would be helpful :)
For stress testing the cpu you could use :

Also you could check this question:

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