Distributed shared memory parallel computer

摘要

PROBLEM TO BE SOLVED: To speed up processing while keeping the consistency of data stored in a shared memory and a cache in a shared memory distribution type parallel computer having plural nodes each of which is provided with a processor, a part of the shared memory, a memory controller, and a cache and connecting respective nodes by inter-connection net routers corresponding to respective nodes. SOLUTION: Each inter-connection net router is provided with a directory storage part and a consistency processing part, and at the time of inputting a memory access request between nodes, the consistency processing part in the router refers to the directory storage part and executes memory access request transfer processing and synchronizing processing between plural inter-connection net routers in accordance with the referred contents to keep the consistency of data stored in the shared memory and the cache.