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Level-Synchronous Parallel Breadth-First Search Algorithms For Multicore and Multiprocessor Systems

Authors:
Rudolf Berrendorf
Mathias Makulla

Keywords: parallel breadth-first search; BFS; NUMA; memory bandwidth; data locality

Abstract:
Breadth-First Search (BFS) is a graph traversal technique used in many applications as a building block, e.g.,~to systematically explore a search space. For modern multicore processors and as application graphs get larger, well-performing parallel algorithms are favourable. In this paper, we systematically evaluate an important class of parallel BFS algorithms and discuss programming optimization techniques for their implementation. We concentrate our discussion on level-synchronous algorithms for larger multicore and multiprocessor systems. In our results, we show that for small core counts many of these algorithms show rather similar behaviour. But, for large core counts and large graphs, there are considerable differences in performance and scalability influenced by several factors. This paper gives advice, which algorithm should be used under which circumstances.

Pages: 26 to 31

Copyright: Copyright (c) IARIA, 2014

Publication date: May 25, 2014

Published in: conference

ISSN: 2308-3735

ISBN: 978-1-61208-339-1

Location: Venice, Italy

Dates: from May 25, 2014 to May 29, 2014