摘要： 近年来,共享存储器的多处理机系统作为提高计算能力以及计算速度的一种有效途径。为了减少系统中的访存冲突和通信冲突,大多数共享存储器的多机系统引入了专用Cache,这就势必会产生多Cache之间的一致性问题,这个问题解决的好坏直接影响到系统的性能。本文对当前存在的Cache一致性问题的几种典型方案进行分析和探讨。

关键词: 高速缓冲存储器, 窥探, 可扩充性, 网络

Abstract: Recently shared-memory multiprocessors have emerged as an especially cosetffective way to improve computing power and speed. Most multiprocessor architects have employed private cache tcchnigues to solve memory contention and communication contention, wbich would introduce the cache consistency or cache coher-ence problem. This artical surveys schemes for cache coherence ranging from protocols that maintain coherence in hardware to software policies.