| 摘要 |
PROBLEM TO BE SOLVED: To prevent the increase of message by reducing the latency of load access in a loosely coupled multiprocessor system. SOLUTION: Concerning the multiprocessor system composed of plural nodes PE0 to PEn-1 mutually connected through a mutual coupling network, plural nodes PE0 to PEn-1 are respectively provided with a main memory 30 for storing data, a cache memory 21 capable of access at higher speed than the main memory 30 for storing one part of data stored in the main memory 30 provided in any one of plural nodes PE0- to PEn-1, a processor 20 for issuing the access request of data and a consistency maintenance control part 16 for holding node information stored in the cache memory 21 concerning the state and copy of data stored in the main memory 30 and investigating the presence/absence of the effective copy concerning the data of a relevant address in the cache memory 21 when load and store access is performed from the processor 20 to the data of the prescribed address.
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