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Design and performance evaluation of an adaptive cache coherence protocol

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3 Author(s)
Won-Kee Hong ; Dept. of Comput. Sci., Yonsei Univ., Seoul, South Korea ; Nam-Hee Kim ; Shin-Dug Kim

In shared-memory multiprocessor systems, the local caches which are used to tolerate the performance gap between processor and memory cause additional bus transactions to maintain the coherency of shared data. Especially, coherency misses and data traffic due to spatial locality and false sharing have a significant effect on the system performance. In this approach, an adaptive cache coherence protocol based on the sectored cache is introduced. It determines the size of a block to be migrated or invalidated dynamically, depending on the transfer mode, so that it can exploit the spatial locality and reduce useless data traffic due to false sharing at the same time. This protocol is evaluated via event-driven simulation, and its results show a 58% decrease in the data traffic and a 45% decrease in the cache miss ratio. Thus, the adaptive cache coherence protocol provides about a 56% improvement in the execution time

Published in:

Parallel and Distributed Systems, 1998. Proceedings. 1998 International Conference on

Date of Conference:

14-16 Dec 1998

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