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Erschienen in:
2006 | OriginalPaper | Buchkapitel
A Cache-Partitioning Aware Replacement Policy for Chip Multiprocessors
verfasst von : Haakon Dybdahl, Per Stenström, Lasse Natvig
Erschienen in: High Performance Computing - HiPC 2006
Verlag: Springer Berlin Heidelberg
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Chip multiprocessors (CMPs) usually employ shared, last-level caches to use on-chip memory resources effectively. Unfortunately, conventional replacement policies applied to shared caches fail to partition memory resources among cores to achieve an optimal execution throughput. This paper presents a novel replacement policy that dynamically estimates how many misses would be eliminated if one more block per set would be allocated to a certain processor taking into account the extra misses for some other processor. Our implementation makes novel use of
shadow tags
for the estimation. We show that it can yield 50% higher execution throughput on a 4-way CMP and in contrast to previously proposed schemes, we did not observe any noticeable degradation of performance for any application in the SPEC2000 we used.