This excerpt taken from the NETL DEF 14A filed Sep 30, 2009.
Fast Messaging Network Technology
RMIs Fast Messaging Network is an innovative way of enabling point-to-point on-chip communications, allowing its multi-core, multi-threaded architecture to deliver highly efficient parallel data processing performance. The Fast Messaging Network works in conjunction with RMIs on-chip Memory Distributed Interconnect® and I/O Distributed Interconnect® networks to connect all cores, caches, I/O and processing agents within the SoC. The Fast Messaging Network eliminates data locks and relieves system loading by supporting hundreds of millions of in-flight messages and packet descriptors between all on-chip elements. The result is a highly scalable on-chip communications architecture designed to eliminate communications bottlenecks between processor cores, acceleration engines, interfaces and memory and thereby maximize processor throughput.