SYSTEM AND METHOD FOR SEPARATE VIRTUAL CHANNELS FOR POSTED REQUESTS IN A MULTIPROCESSOR SYSTEM

摘要

A computer system provides a posted commands virtual channel separate from the non-posted commands virtual channel for routing posted and non-posted requests through coherent and noncoherent fabrics within the computer system. The computer system also allocate separate resources to each of the virtual channels, thus allowing posted requests to become unordered with other requests from the same source. Such an implementation allows the computer system to maintain compatibility with I/O systems in which posted write requests may become unordered with previous posted requests (e.g., the Peripheral Component Interconnect Bus).