A system comprises a plurality of nodes, each node comprising one or more coherent
agents coupled to an interconnect. Ownership of a coherency block accessed by a
transaction on the interconnect is transferred responsive to transmission of the
address on the interconnect. The system further includes a second interconnect
to which the plurality of nodes are coupled, wherein ownership of a coherency block
is transferred on the second interconnect responsive to a transmission of the data
comprising the coherency block on the second interconnect. A first node of the
plurality of nodes issues a coherency command on the second interconnect to fetch
the coherency block in response to the transaction on the interconnect within the
first node, whereby ownership transfers within the first node prior to ownership
transferring from another one of the plurality of nodes to the first node.