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Network on chip: Switch Fabrics.

Two-by-two switch element connects eight devices in three stages.

Can use a larger radix: benes, clos, shuffle, delta, (even batcher-banyan).

Problem: typically we will not need quite as many initiators as targets. Throughput=no of ports, but fabric may block and there may be receiver contention.

Can be overly complex on the small scale, but scale up well.

Network On Chip Synthesis Tool: Mullins et al.\ NetGen Network Generator.

(C) 2008-10, DJ Greaves, University of Cambridge, Computer Laboratory.