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2007
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An Adaptive Cache Coherence Protocol Optimized for Producer-Consumer Sharing

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An Adaptive Cache Coherence Protocol Optimized for Producer-Consumer Sharing
Shared memory multiprocessors play an increasingly important role in enterprise and scientific computing facilities. Remote misses limit the performance of shared memory applications , and their significance is growing as network latency increases relative to processor speeds. This paper proposes two mechanisms that improve shared memory performance by eliminating remote misses and/or reducing the amount of communication required to maintain coherence. We focus on improving the performance of applications that exhibit producer-consumer sharing. We first present a simple hardware mechanism for detecting producerconsumer sharing. We then describe a directory delegation mechanism whereby the “home node” of a cache line can be delegated to a producer node, thereby converting 3-hop coherence operations into 2-hop operations. We then extend the delegation mechanism to support speculative updates for data accessed in a producer-consumer pattern, which can convert 2-hop misses into loc...
Liqun Cheng, John B. Carter, Donglai Dai
Added 02 Jun 2010
Updated 02 Jun 2010
Type Conference
Year 2007
Where HPCA
Authors Liqun Cheng, John B. Carter, Donglai Dai
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