2015 | OriginalPaper | Buchkapitel
Efficient Implementation of a Synchronous Parallel Push-Relabel Algorithm
verfasst von : Niklas Baumstark, Guy Blelloch, Julian Shun
Erschienen in: Algorithms - ESA 2015
Verlag: Springer Berlin Heidelberg
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Motivated by the observation that FIFO-based push-relabel algorithms are able to outperform highest label-based variants on modern, large maximum flow problem instances, we introduce an efficient implementation of the algorithm that uses coarse-grained parallelism to avoid the problems of existing parallel approaches. We demonstrate good relative and absolute speedups of our algorithm on a set of large graph instances taken from real-world applications. On a modern 40-core machine, our parallel implementation outperforms existing sequential implementations by up to a factor of 12 and other parallel implementations by factors of up to 3.