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- W2029111186 abstract "As microprocessor designs integrate more cores, scalability of cache coherence protocols becomes a challenging problem. Most directory-based protocols avoid races by using blocking tag directories that can impact the performance of parallel applications. In this article, we first quantitatively demonstrate that state-of-the-art blocking protocols significantly constrain throughput at large core counts for several parallel applications. Nonblocking protocols address this throughput concern at the expense of scalability in the interconnection network or in the required resource overheads. To address this concern, we enhance nonblocking directory protocols by migrating the point of service of responses. Our approach uses in-flight chains of cores making parallel memory requests to incorporate scalability while maintaining high-throughput. The proposed cache coherence protocol called chained cache coherence , can outperform blocking protocols by up to 20% on scientific and 12% on commercial applications. It also has low resource overheads and simple address ordering requirements making it both a high-performance and scalable protocol. Furthermore, in-flight chains provide a scalable solution to building hierarchical and nonblocking tag directories as well as optimize communication latencies." @default.
- W2029111186 created "2016-06-24" @default.
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- W2029111186 date "2013-12-01" @default.
- W2029111186 modified "2023-10-18" @default.
- W2029111186 title "Using in-flight chains to build a scalable cache coherence protocol" @default.
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- W2029111186 doi "https://doi.org/10.1145/2541228.2541235" @default.
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