A GPU-enabled solver for time-constrained linear sum assignment problems

R. Roverso, A. Naiem, M. El-Beltagy, S. El-Ansary, S. Haridi
Peerialism Inc., Stockholm, Sweden
The 7th International Conference on Informatics and Systems (INFOS), 2010


   title={A GPU-enabled solver for time-constrained linear sum assignment problems},

   author={Roverso, R. and Naiem, A. and El-Beltagy, M. and El-Ansary, S. and Haridi, S.},

   booktitle={Informatics and Systems (INFOS), 2010 The 7th International Conference on},





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This paper deals with solving large instances of the Linear Sum Assignment Problems (LSAPs) under realtime constraints, using Graphical Processing Units (GPUs). The motivating scenario is an industrial application for P2P live streaming that is moderated by a central tracker that is periodically solving LSAP instances to optimize the connectivity of thousands of peers. However, our findings are generic enough to be applied in other contexts. Our main contribution is a parallel version of a heuristic algorithm called Deep Greedy Switching (DGS) on GPUs using the CUDA programming language. DGS sacrifices absolute optimality in favor of a substantial speedup in comparison to classical LSAP solvers like the Hungarian and auctioning methods. We show the modifications needed to parallelize the DGS algorithm and the performance gains of our approach compared to a sequential CPU-based implementation of DGS and a mixed CPU/GPU-based implementation of it.
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