Methods and apparatus for responding to a request cluster

A computer system, comprising:

• a first cluster including a first plurality of processors and a first cache coherence controller, the first plurality of processors and the first cache coherence controller interconnected in a point-to-point architecture;
• a second cluster including a second plurality of processors and a second cache coherence controller, the second plurality of processors and the second cache coherence controller interconnected in a point-to-point architecture, the first cache coherence controller coupled to the second cache coherence controller and configured to send a request to the second cluster;
• wherein the first cache coherence controller is configured to receive a plurality of probe responses corresponding to the request.

A method for a cache coherence controller to manage data access in a multiprocessor system, the method comprising:

• sending a cache access request originating from a first cluster of processors to a second cluster of processors;
• receiving a plurality of probe responses corresponding to the cache access request from a plurality of clusters.

A cache coherence controller in a multiprocessor system, the cache coherence controller comprising:

• means for sending a cache access request originating from a first cluster of processors to a second cluster of processors;
• means for receiving a plurality of probe responses corresponding to the cache access request from a plurality of clusters.