System and method for a distributed crossbar network using a plurality of crossbars
View Patent ↗A system and method for single hop, processor-to-processor communication in a multiprocessing system over a plurality of crossbars are disclosed. Briefly described, one embodiment is a multiprocessing system comprising a plurality of processors having a plurality of high-bandwidth point-to-point links; a plurality of processor clusters, each processor cluster having a predefined number of the processors residing therein; and a plurality of crossbars, one of the crossbars coupling each of the processors of one of the plurality of processor clusters to each of the processors of another of the plurality of processor clusters, such that all processors are coupled to each of the other processors, and such that the number of crossbars is equal to [X*(X−1)/2], wherein X equals the number of processor clusters.
1. A system for processor-to-processor communication in a multiprocessing system using a single hop across one crossbar, comprising:
means for specifying a plurality of link groups for a processor cluster, wherein a link group is a group of high-bandwidth point-to-point links, each link being from one of a plurality of processors residing in the processor cluster, each processor cluster having a number of link groups equal to the number of processor clusters minus one; and
means for coupling each link group of the processor cluster to the link group of another processor cluster via one crossbar, wherein the total number of crossbars is equal to [X*(X−1)/2] and wherein X equals the number of processor clusters in the multiprocessing system, such that the processors in the multiprocessing system are communicatively coupled together via one of the crossbars.