Abstract
This paper describes an interprocess communication system built around a message-passing model which we have developed for a bus-based multiprocessor. It is based on an OS9 operating system kernel in each processor, and comprises an integrated set of system modules. These manage message communication between processors and provide a global communication interface for application processes through which they can exchange messages in a transparent way. The implementation uses channels and virtual circuits and the communication primitives support synchronous and asynchronous message transfer, and group communication.
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