CATCH

Author:

Kleanthous Marios1,Sazeides Yiannakis1

Affiliation:

1. University of Cyprus, Nicosia, Cyprus

Abstract

Cache-content-duplication (CCD) occurs when there is a miss for a block in a cache and the entire content of the missed block is already in the cache in a block with a different tag. Caches aware of content-duplication can have lower miss penalty by fetching, on a miss to a duplicate block, directly from the cache instead of accessing lower in the memory hierarchy, and can have lower miss rates by allowing only blocks with unique content to enter a cache. This work examines the potential of CCD for instruction caches. We show that CCD is a frequent phenomenon and that an idealized duplication-detection mechanism for instruction caches has the potential to increase performance of an out-of-order processor, with a 16KB, 8-way, 8 instructions per block instruction cache, often by more than 10% and up to 36%. This work also proposes CATCH, a hardware mechanism for dynamically detecting CCD for instruction caches. Experimental results for an out-of-order processor show that a duplication-detection mechanism with a 1.38KB cost captures on average 58% of the CCD's idealized potential.

Funder

Republic of Cyprus and the European Regional Development Fund

Research Promotion Foundation

Publisher

Association for Computing Machinery (ACM)

Subject

Hardware and Architecture,Information Systems,Software

Cited by 2 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Race-to-sleep + content caching + display caching;Proceedings of the 50th Annual IEEE/ACM International Symposium on Microarchitecture;2017-10-14

2. A Primer on Compression in the Memory Hierarchy;Synthesis Lectures on Computer Architecture;2015-12-18

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