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Cache Coherence Scheme for HCS-Based CMP and Its System Reliability Analysis
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DOI：10.1109/ACCESS.2017.2701406.png)
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摘要
En 中文
In previous work, a new network switch architecture, hybrid circuit-switched (HCS) network, has been proposed and evaluated. In doing so, it has been studied for use in a multi-processor system, with a focus on power and throughput. However, cache coherence and its connection with chip reliability have not been fully studied previously for multi-processor systems. In this paper, we study this problem by discussing the implementation of cache coherence on a HCS-based chip multi-processor and present a way to model the reliability of these protocols based on fault tree analysis and two-terminal networking models. We focus our efforts on three cache coherence protocols: Write-Once, Modified, Exclusive, Shared, Invalid (MESI), and Modified, Owned, Exclusive, Shared, Invalid (MOESI), and obtain expressions for the reliability probabilities of the system. Our results show that the Write-Once protocol is 14% less reliable than MOESI, while the MESI protocol is 2.5% less reliable than MOESI. We also demonstrate that the reliability of these protocols are 40.22% and 59.83% better, on average, when implemented on an HCS network rather than an elastic buffer-based network or a bus-based network, respectively.
Keyword:
Cache coherence
networking switch
system reliability
fault tree analysis (FTA)
2-terminal model
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IF:
3.6
论文数:
9.8W
被引数:
29.4W
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