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Proactive Use of Shared L3 Caches to Enhance Cache Communications in Multi-Core Processors

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2 Author(s)
Fide, S. ; Dept. of Electr. Eng. & Comput. Sci., Univ. of California, Irvine, CA ; Jenks, S.

The software and hardware techniques to exploit the potential of multi-core processors are falling behind, even though the number of cores and cache levels per chip is increasing rapidly. There is no explicit communications support available, and hence inter-core communications depend on cache coherence protocols, resulting in demand-based cache line transfers with their inherent latency and overhead. In this paper, we present software controlled eviction (SCE) to improve the performance of multithreaded applications running on multi-core processors by moving shared data to shared cache levels before it is demanded from remote private caches. Simulation results show that SCE offers significant performance improvement (8-28%) and reduces L3 cache misses by 88-98%.

Published in:

Computer Architecture Letters  (Volume:7 ,  Issue: 2 )

Date of Publication:

July-Dec. 2008

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