Patent ID: 6615322
Filing Date: 2003-09-02
Classification: G06F

Abstract:
A non-uniform memory access (NUMA) computer system, comprising:a remote node and a home node coupled by a node interconnect, wherein said home node includes a home system memory and said remote node includes: a local interconnect; a node controller, coupled between said local interconnect and said node interconnect, that transmits requests between said remote node and said home node; and a processing unit and at least one cache coupled to said local interconnect, wherein said processing unit first issues on said local interconnect a read-type request targeting data resident in said home system memory with a flag in said read-type request set to a first state to indicate only local servicing of said read-type request and, responsive to inability to service said read-type request locally in said remote node, said processing unit reissues said read-type request with said flag set to a second state to instruct said node controller to transmit said read-type request to said home node.