GPU-based tuning of quantum-inspired genetic algorithm for a combinatorial optimization problem

R. Nowotniak, J. Kucharski
Computer Engineering Department, Technical University of Lodz, 18/22 Stefanowskiego St., 90-924 Lodz, Poland
Bulletin of the Polish Academy of Sciences, Technical Sciences, Vol. 60, No. 2, 2012


   title={GPU-based Tuning of Quantum-Inspired Genetic Algorithm for a Combinatorial Optimization Problem},

   author={Nowotniak, R. and Kucharski, J.},



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This paper concerns efficient parameters tuning (meta-optimization) of a state-of-the-art metaheuristic, Quantum-Inspired Genetic Algorithm (QIGA), in a GPU-based massively parallel computing environment (NVidia CUDA technology). A novel approach to parallel implementation of the algorithm has been presented. In a block of threads, each thread transforms a separate quantum individual or different quantum gene; In each block, a separate experiment with different population is conducted. The computations have been distributed to eight GPU devices, and over 400x speedup has been gained in comparison to Intel Core i7 2.93GHz CPU. This approach allows efficient meta-optimization of the algorithm parameters. Two criteria for the meta-optimization of the rotation angles in quantum genes state space have been considered. Performance comparison has been performed on combinatorial optimization (knapsack problem), and it has been presented that the tuned algorithm is superior to Simple Genetic Algorithm and to original QIGA algorithm.
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