片内多处理器Cache一致性解决方案

Solution of Cache coherence in SCMP

单芯片多处理器(SCMP)系统是当前计算机体系结构研究的热点问题之一。与传统的多处理机系统一样,Cache一致性问题也是片内多处理器系统必须首先解决的问题。本文针对传统的多处理机系统在解决数据一致性问题上所普遍采用的写作废协议的实现方式上所存在的缺陷,提出了一种基于“双环结构”的片内Cache一致性解决方案,并对其实现后的性能进行了测试和评价。

Single Chip Muhiprocessors （ SCMP ） system is one of the most important microprocessor architectures today. Cache coherence must be maintained in SCMP, as well as in conventional multi - processors system. There are two classic cache coherence protocols： snooping based1 which will lead to long latency with the increasing of nodes and directory based, which will lead to more conflict in directory access. A new cache coherence protocol, ＂cache coherence based on dualring structure＂ is proposed to solve these problems effectively.