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Leakage Energy Management Techniques via Shared L2 Cache Partitioning  

Kang, Hee-Joon (서울대학교 컴퓨터공학과)
Kim, Hyun-Hee (서울대학교 컴퓨터공학과)
Kim, Ji-Hong (서울대학교 컴퓨터공학과)
Publication Information
Journal of KIISE:Computer Systems and Theory / v.37, no.1, 2010 , pp. 43-54 More about this Journal
Abstract
The existing timeout based cache leakage management techniques reduce the leakage energy consumption of the cache significantly by switching off the power supply to the inactive cache line. Since these techniques were mainly proposed for single-processor systems, their efficiency is reduced significantly in multiprocessor systems with a shared L2 cache because of the cache interferences among simultaneously executing tasks. In this paper, we propose a novel cache partition strategy which partitions the shared L2 cache considering the inactive cycles of the cache line. Furthermore, we propose the adaptive task-aware timeout management technique which considers the characteristics of each task and adapts the timeout dynamically. Experimental results from the simulation show that the proposed technique reduces the leakage energy consumption of the shared L2 cache by 73% for the 2-way CMP and 56% for the 4-way CMP on average compared to the existing representative leakage management technique, respectively.
Keywords
cache leakage energy management; multiprocessors; shared L2 cache; cache partitioning;
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Times Cited By KSCI : 1  (Citation Analysis)
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