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- W4301438332 abstract "Communication is a major factor determining the performance of algorithms on current computing systems; it is therefore valuable to provide tight lower bounds on the communication complexity of computations. This paper presents a lower bound technique for the communication complexity in the bulk-synchronous parallel (BSP) model of a given class of DAG computations. The derived bound is expressed 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 tight lower bounds for the fast Fourier transform (FFT), and for any sorting and permutation network. A stronger bound is also derived for the periodic balanced sorting network, by applying this technique to suitable subnetworks. Finally, we demonstrate that the switching potential captures communication requirements even in computational models different from BSP, such as the I/O model and the LPRAM." @default.
- W4301438332 created "2022-10-05" @default.
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- W4301438332 date "2017-07-07" @default.
- W4301438332 modified "2023-09-27" @default.
- W4301438332 title "A Lower Bound Technique for Communication in BSP" @default.
- W4301438332 doi "https://doi.org/10.48550/arxiv.1707.02229" @default.
- W4301438332 hasPublicationYear "2017" @default.
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