System and method for fair arbitration on a multi-domain multipr

Details System and method for fair arbitration on a multi-domain multipr System and method for fair arbitration on a multi-domain multipr

1993-09-29

1996-04-16

Harvey, Jack B.

395299, H01J 1300

Patent

active

055091253

ABSTRACT:
A multi-domain, distributed arbitration system, and a method performed by a plurality of arbiters to control arbitration of requests for a multiprocessor system bus. The requests are generated by a plurality of nodes coupled to the multiprocessor system bus. The requests are presented on a plurality of arbitration request lines. Each node comprises one of the arbiters such that each arbiter is associated with a corresponding node. A plurality of domains are created by the arbiters based on a bit-wise combination of the requests on the arbitration lines. A priority is assigned to each domain relative to the other domains. Each arbiter monitors the requests on the arbitration request lines and generates an i.sub.-- win result that indicates whether or not the associated node is an overall arbitration winner if a request from that node is pending. In addition, the arbiters generate a who.sub.-- won result that indicates which node was the overall arbitration winner according to the assigned priorities.

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