Abstract
Random network topologies have been proposed for building a low-latency network for parallel-computing systems. However, collective communication algorithms are not well considered on random network topologies. In this context, we investigate the performance impact of existing topologyagnostic collective communication algorithms on random network topologies. Evaluation results using discrete event simulation showed that (1) the Chain Concatenation Order (CCO) algorithm improved up to 10% of broadcast operations compared to Random Order algorithm, and (2) the performance of the CCO broadcast operations on random topology was better than that of a conventional broadcast operation on 3dtorus.
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