by Robert A. Maddox, Gurbir Singh, Robert J. Safranek, Dr. Dobb’s Journal
The architecture of the Intel QuickPath Interconnect (Intel QPI), like many components in a computer system, is comprised of a number layers. Each of these layers performs a distinct function in controlling the logical operation of the Intel QPI. This article introduces the four architectural layers of the Intel QPI — the physical, link, routing, protocol layers — and introduces other aspects of the architecture including performance and reliability, as well as some initial design considerations for a system using Intel QPI.
Many contemporary communication architectures have been influenced by the Open Systems Interconnection (OSI) abstract seven-layer model of networking. Intel QPI is no exception and has its own layered model. The functions performed by Intel QPI are logically grouped into four different layers. There are four layers: Physical Layer, Link Layer, Routing Layer, and Protocol Layer.
