Ring based distributed communication bus for a multiprocessor ne

Details Ring based distributed communication bus for a multiprocessor ne Ring based distributed communication bus for a multiprocessor ne

1994-06-03

1996-08-27

Geckil, Mehmet B.

Boots, shoes, and leggings

39520018, 395468, 364DIG1, 36424341, 36424294, G06F 1200

Patent

active

055510485

ABSTRACT:
A method for providing communication between a plurality of nodes coupled in a ring arrangement, wherein a plurality of the nodes comprise processors each having a cache memory for storing a subset of shared data. Each of the nodes on the ring deposits data into a data slot during a given time period. The data deposited by each node may comprise an address field and a node field. To ensure data coherency between the caches, each processor on the ring includes a queue for saving a plurality of received data representative of the latest bus data transmitted on the bus. As each processor receives new data, the new data is compared against the plurality of saved data in the queue to determine if the address field of the new data matches the address field of any of the saved data of the queue. In the event that the new data matches one of the plurality of saved data, it is determined whether the new data represents updated data from the memory device. If the new data represents updated data it is shifted into the queue. If it does not represent updated data, it is discarded.

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