A MULTI-PROCESSOR SYSTEM HAVING COMMUNICATION REGISTER MODULES USING TEST-AND-SET REQUEST OPERATION FOR SYNCHRONIZING COMMUNICATIONS

A multi-processor system includes N processors ("N" being an integer) for processing data, a storage unit for storing data, and a communication register unit for synchronizing a communication performed among the processors. These units are interconnected via an interconnection network. The communication register unit is subdivided into N communication register modules for storing the same contents. Each of the communication register modules is accessed by the respective processors in one-to-one correspondence, which can be referred at the same time. When a write request is made in a certain communication register module, the content of this write request is broadcasted to other communication register modules.