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Enabling Partial Cache Line Prefetching Through Data Compression

10 years 6 months ago
Enabling Partial Cache Line Prefetching Through Data Compression
Hardware prefetching is a simple and effective technique for hiding cache miss latency and thus improving the overall performance. However, it comes with addition of prefetch buffers and causes significant memory traffic increase. In this paper we propose a new prefetching scheme which improves performance without increasing memory traffic or requiring prefetch buffers. We observe that a significant percentage of dynamically appearing values exhibit characteristics that enable their compression using a very simple compression scheme. The bandwidth freed by transferring values from lower levels in memory hierarchy to upper levels in compressed form is used to prefetch additional compressible values. These prefetched values are held in vacant space created in the data cache by storing values in compressed form. Thus, in comparison to other prefetching schemes, our scheme does not introduce prefetch buffers or increase the memory traffic. In comparison to a baseline cache that does ...
Youtao Zhang, Rajiv Gupta
Added 04 Jul 2010
Updated 04 Jul 2010
Type Conference
Year 2003
Where ICPP
Authors Youtao Zhang, Rajiv Gupta
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