An Evaluative Study on the Effects of Contention on Message Latencies in Large Supercomputers
Workshop on Large Scale Parallel Processing at IPDPS (LSPP) 2009
Publication Type: Talk
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Significant theoretical research was done on interconnect topologies and topology aware mapping for parallel computers in the 80s. With the deployment of virtual cut-through, wormhole routing and faster interconnects, message latencies reduced and research in the area died down. This talk presents a study showing that with the emergence of very large supercomputers, typically connected as a 3D torus or mesh, topology effects have become important again. It presents an evaluative study on the effect of contention on message latencies on torus and mesh networks.
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