System having address-based intranode coherency and data-based internode coherency

A node comprising

• one or more coherent agents coupled to a first interconnect, wherein when a coherency block located in the node is accessed by a transaction on the first interconnect for transmission to another node that requested the access, ownership for the coherency block in the node is transferred as an intranode ownership responsive to transmission of an address of the coherency block on the first interconnect;
• and
• a node controller coupled to the first interconnect and configured to transmit coherency commands on a second interconnect to other nodes, including the another node, wherein ownership of the coherency block from the node to the another node is transferred on the second interconnect as an internode ownership responsive to a data fill command for the coherency block from the node, and wherein intranode ownership transfer is achieved by address transfer on the first interconnect and internode ownership transfer is achieved by data transfer on the second interconnect to allow use of a non-retry-capable interconnect for the first interconnect.

A computer accessible medium comprising one or more data structures representing a node including:

• one or more coherent agents coupled to a first interconnect, wherein when a coherency block located in the node is accessed by a transaction on the first interconnect for transmission to another node that requested the access, ownership for the coherency block in the node is transferred as an intranode ownership responsive to transmission of an address of the coherency block on the first interconnect;
• and
• a node controller coupled to the first interconnect and configured to transmit coherency commands on a second interconnect to other nodes, including the another node, wherein ownership of the coherency block from the node to the another node is transferred on the second interconnect as an internode ownership responsive to a data fill command for the coherency block from the node, and wherein intranode ownership transfer is achieved by address transfer on the first interconnect and internode ownership transfer is achieved by data transfer on the second interconnect to allow use of a non-retry-capable interconnect for the first interconnect.