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Red Hat Enterprise Linux: Understanding CPUfreq Power Governors

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Executive Summary

With today's rising energy costs, controlling power consumption is increasingly important. Power usage affects everyone - from a laptop user trying to stretch battery life to the corporate data center with many machines. More systems, more applications, more storage, and more servers require a lot of electricity, and they generate a lot of heat. Add the cost of cooling, and overall power costs for any IT infrastructure become significant rather quickly. Then there's still cooling to consider. The most effective way to reduce power demand and cool down a Linux system is to use CPUfreq technology.

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