Power Capping Via Forced Idleness
msra(2009)
摘要
We introduce a novel power capping technique, IdleCap, that achieves higher effective server frequency for a given power constraint than existing techniques. IdleCap works by repeatedly alternating between the highest performance state and a low-power idle state, maintaining a fixed av- erage power budget, while significantly increasing the av- erage processor frequency. In experiments conducted on an IBM BladeCenter HS21 server across three representa- tive workloads, IdleCap reduces the mean response time by up to a factor of 3 when compared to power capping using clock-throttling. Furthermore, we argue how IdleCap ap- plies to next-generation servers using DVFS and advanced idle states.
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