Abstract
Power and cooling considerations have moved to the forefront of modern system design. The restrictions placed upon systems by power and cooling requirements have focused much research on a variety of techniques to reduce maximum power and leakage. Simultaneously, efforts are being made to adapt microarchitectural features to the current needs of an application. We focus instead on adapting large scale resources to the current needs of a server farm.
We study the efficacy of powering on and off CPUs in symmetric multiprocessors (SMP). We develop a number of different predictive and reactive techniques for identifying when cores should have their state altered. We present results for these policies and find a hybrid policy presents a reasonable balance between the time necessary to predict future needs and the accuracy of these predictions. It maintains 97% of the original system performance while reducing the energy per web interaction by 25%.
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Ghiasi, S., Felter, W. (2005). CPU Packing for Multiprocessor Power Reduction. In: Falsafi, B., VijayKumar, T.N. (eds) Power-Aware Computer Systems. PACS 2003. Lecture Notes in Computer Science, vol 3164. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-28641-7_9
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DOI: https://doi.org/10.1007/978-3-540-28641-7_9
Publisher Name: Springer, Berlin, Heidelberg
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