Data processing system having a write request network and a write data network

A data processing system comprising:

• a requester switch point comprising a local port coupled to a processing unit, a write request egress port coupled to a write request network and a write data egress port coupled to a write data network, the requestor switch point configured to output a write request from the processing unit to the write request network and write data from the processing unit to the write data network;
• a target switch point coupled to the write request network and the write data network;
• and
• one or more intermediate switch points coupled to the write request network and the write data network, between the requestor switch point and target switch point, and configured to transmit the write request and write data from the requestor switch point to the target switch point, wherein upon each of the one or more intermediate switch points granting the write request access to a write request egress port of the intermediate switch point, the intermediate switch point grants the write data access to a write data egress port of the intermediate switch point which corresponds to the write request egress port of the intermediate switch point.

In a data processing system having a plurality of switch points interconnected by a write request network and a write data network, each switch point having write request ingress ports and write request egress ports coupled to the write request network, and write data ingress ports and write data egress points coupled to the write data network, a method comprising:

• receiving write requests from the write request network at a first number of write request ingress ports and write data from the write data network at the first number of write data ingress ports;
• at each of a second number of write request egress ports, arbitrating among received write requests indicating the write request egress port to grant access to a selected write request to the corresponding write request egress port;
• providing the selected write requests to the write request network via the corresponding write egress ports;
• and
• in response to granting access to a selected write request to a corresponding write request egress port, routing write data received at a write data ingress port corresponding to the write request ingress port which received the selected write request data to a write data egress port corresponding to the write request egress port which provided the selected write request to the write request network.