关键词: cache一致性协议 目录组织 混合目录 目录Cache

Abstract:

The DSM multiprocessors systems that employ the cache coherence non-uniform memory access architecture is one of the implementation ways of recent mas sively high-performance parallel computers. Because of the better scalability than snooping protocols, directory protocols are widely used. With the exp  ansion of system size, the directory protocols al- so encounter the problem of scalability. First, the factors that affect the scalability of directory  protocols are analyzed, several typical directory organization schemes are discussed. Finally, we propose a two-level directory scheme based on director    y cache.

Key words: cache coherence, directory organization, hybrid directory, directory cache