Multiprocessor interconnection and access arbitration arrangemen

Details Multiprocessor interconnection and access arbitration arrangemen Multiprocessor interconnection and access arbitration arrangemen

1988-08-22

1993-01-12

Shaw, Gareth D.

Multiplex communications

Wide area network

Packet switching

370 1, 370 68, 36492798, 3649352, 3649659, G06F 13364

Patent

active

051796694

ABSTRACT:
In a multiprocessor system (FIG. 1), the processors (10-12) are interconnected by a non-blocking communication medium such as a crossbar switch (19). Each processor is connected to a dedicated port circuit (18) at the switch by an optical link (16). Each port circuit is connected to the crossbar switch by an electrical link (20). The port circuits are interconnected by a contention medium (14). A port circuit sends an access request by its connected processor to the destination processor over the contention medium. Circuitry (205) at each port circuit receives requests, for access to the connected processor, prioritizes conflicting requests, and grants them sequentially. The circuitry interleaves grants of access to the connected processor with grants of outgoing access requests made by the connected processor. The circuitry grants an access request by causing the crossbar switch to establish the corresponding connection.

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