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Published in:
2013 | OriginalPaper | Chapter
Design and Implementation of Dynamically Reconfigurable Token Coherence Protocol for Many-Core Processor
Authors : Chuan Zhou, Yuzhuo Fu, Jiang Jiang, Xing Han, Kaikai Yang
Published in: Computer Engineering and Technology
Publisher: Springer Berlin Heidelberg
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To efficiently maintain cache coherence in a many-core processor remains a big challenge today. Traditional protocols either offer low cache miss latency (like snoopy protocol) or not depending on bus-like interconnects (like directory protocol). Recently, Token Coherence has been proposed to capture the main characteristic of traditional protocols. However, since Token Coherence relies on broadcast-based transient request and inefficient persistent request, it is only suitable for small system. In order to make Token Coherence be scalable in many-core architectures, in this paper we introduce a dynamically reconfigurable mechanism to Token Coherence. Basing on sub-net, this mechanism can significantly reduce the average execution time and communication cost in 16-core processor. Therefore, this dynamically reconfigurable mechanism makes Token Coherence applicable in many-core architecture.