Multiprocessor system, consistency control device and consistency control method in multiprocessor system

摘要

A multiprocessor system with cells having a plurality of CPUs sharing a memory and a consistency control device connected through a network, in which the consistency control device includes a request unit which issues an access request and a speculative access request, a home unit which receives an access request from the request unit of each cell, and an owner unit which receives a speculative access request from the request unit of each cell, the request unit further including an owner decision unit which predicts a cell holding requested data and a determination unit which determines whether processing based on prediction is to be conducted or not.