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MultiGraph: Efficient Graph Processing on GPUs

High-level GPU graph processing frameworks are an attractive alternative for achieving both high productivity and high performance. Hence, several high-level frameworks for graph processing on GPUs have been developed. In this paper, we develop an approach to graph processing on GPUs that seeks to overcome some of the performance limitations of existing frameworks. It uses multiple data representation and execution strategies for dense versus sparse vertex frontiers, dependent on the fraction of active graph vertices. A two-phase edge processing approach trades off extra data movement for improved load balancing across GPU threads, by using a 2D blocked representation for edge data. Experimental results demonstrate performance improvement over current state-of-the-art GPU graph processing frameworks for many benchmark programs and data sets.