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Parallelization of Ant System for GPU under the PRAM Model

A. Brodnik - M. Grgurovič

Vydavateľ / Publisher:

Ústav informatiky SAV

Rok, strany / Year, pages: 2018, 229-243


Jazyk / Language: eng

Publikované / Published: 1. 6. 2018

Typ dokumentu / Type of Document:

Popis / Abstract:

We study the parallelized ant system algorithm solving the traveling salesman problem on n cities. First, following the series of recent results for the graphics processing unit, we show that they translate to the PRAM (parallel random access machine) model. In addition, we develop a novel pheromone matrix update method under the PRAM CREW (concurrent-read exclusive-write) model and translate it to the graphics processing unit without atomic instructions. As a consequence, we give new asymptotic bounds for the parallel ant system, resulting in step complexities O(n łg łg n) on CRCW (concurrent-read concurrent-write) and O(n łg n) on CREW variants of PRAM using n2 processors in both cases. Finally, we present an experimental comparison with the currently known pheromone matrix update methods on the graphics processing unit and obtain encouraging results.

Ako citovať / How to Cite:

ISO 690:
Brodnik, A., Grgurovič, M. 2018. Parallelization of Ant System for GPU under the PRAM Model. In Computing and Informatics, vol. 37, no.1, pp. 229-243. DOI:

Brodnik, A., Grgurovič, M. (2018). Parallelization of Ant System for GPU under the PRAM Model. Computing and Informatics, 37(1), 229-243. DOI:

Kľúčové slová / Keywords:

Parallel random access machine, graphics processing unit, ant system, metaheuristics, traveling salesman problem, combinatorial optimization

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