Communication complexity is defined, within the Bulk Synchronous Parallel (BSP) model of computation, as the sum of the degrees of all the supersteps. A lower bound to the communication complexity is derived for a given class of DAG computations in terms of the switching potential of a DAG, that is, the number of permutations that the DAG can realize when viewed as a switching network. The proposed technique yields a novel and tight lower bound for the FFT graph
A Lower Bound Technique for Communication on BSP with Application to the FFT
BILARDI, GIANFRANCO;SCQUIZZATO, MICHELE;SILVESTRI, FRANCESCO
2012
Abstract
Communication complexity is defined, within the Bulk Synchronous Parallel (BSP) model of computation, as the sum of the degrees of all the supersteps. A lower bound to the communication complexity is derived for a given class of DAG computations in terms of the switching potential of a DAG, that is, the number of permutations that the DAG can realize when viewed as a switching network. The proposed technique yields a novel and tight lower bound for the FFT graph
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