Ring-based memory requests in a shared memory multi-processor

Details Ring-based memory requests in a shared memory multi-processor Ring-based memory requests in a shared memory multi-processor

2005-05-17

2005-05-17

Elmore, Reba I. (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

C711S119000, C711S130000, C711S154000

Reexamination Certificate

active

06895477

ABSTRACT:
A system includes a plurality of processing clusters and a snoop controller adapted to service memory requests. The snoop controller and each processing cluster are coupled to a snoop ring. A first processing cluster forwards a memory request to the snoop controller for access to a memory location. In response to the memory request, the snoop controller places a snoop request on the snoop ring—calling for a change in ownership of the requested memory location. A second processing cluster receives the snoop request on the snoop ring. The second processing cluster generates a response to the snoop request. If the second processing cluster owns the requested memory location, the second processing cluster modifies ownership status of the requested memory location.

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