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 ringcalling
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.
