基于新型Cache一致性协议的共享虚拟存储系统

介绍了一个基于新型Ｃａｃｈｅ一致性协议的共享虚拟存储系统ＪＩＡＪＩＡ，与目前国际上具有代表性的共享虚拟存储系统相比，ＪＩＡＪＩＡ采用了基于ＵＮＭＡ的结构，能够把多个机器的物理地址空间组织成一个更大的共享虚拟地址空间，此外，ＪＩＡＪＩＡ实现了一种基于锁的新型一致性协议，通过附带在锁上的ｗｒｉｔｅ－ｎｏｔｉｃｅ来维护一致性，从而避免了传统的目录协议中由目录引起的存储开销和系统复杂度，利用一些被广泛使用

A SOFTWARE DSM SYSTEM BASED ON A NEW CACHE COHERENCE PROTOCOL

This paper describes the design and evaluation of a software distributed shared memory (DSM) system called JIAJIA. JIAJIA is a home based software DSM system in which physical memories of multiple computers are combined to form a larger shared space. It implements the lock based cache coherence protocol which totally eliminates directory and maintains coherence through accessing write notices kept on the lock. The experiments with some widely accepted DSM benchmarks such as SPLASH2 program suite and NAS Parallel Benchmarks indicate that, compared to recent software DSMs such as CVM, higher performance is achieved by JIAJIA. Besides, JIAJIA can solve large problems that cannot be solved by other software DSMs due to memory size limitation.