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A numerical study of an MPI/OpenMP implementation based on asynchronous threads for a three-dimensional splitting scheme in heat transfer problems

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Abstract

We present the results of a study of the parallel algorithms based on MPI and OpenMP for vector splitting schemes in heat transfer problems. We compare the three parallel implementations: MPI, “simple” MPI/OpenMP (#pragma omp directives applied to MPI-based code), and MPI/OpenMP with “postman” threads. The main idea of the last algorithm is to assign one thread within each computational node to perform the data transfer. This approach allows us to implement overlapping of useful computations and data transfer. The results show that the introducing postman threads can significantly improve the performance of an MPI/OpenMP implementation; nevertheless, for the considered class of numerical algorithms, it is more reasonable to use an MPI implementation.

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Authors and Affiliations

  1. Institute of Computational Mathematics and Mathematical Geophysics, pr. Akad. Lavrent’eva 6, Novosibirsk, 630090, Russia

    K. V. Voronin

  2. Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090, Russia

    K. V. Voronin

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  1. K. V. Voronin
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Correspondence to K. V. Voronin.

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Original Russian Text © K.V. Voronin, 2014, published in Sibirskii Zhurnal Industrial’noi Matematiki, 2014, Vol. XVII, No. 2, pp. 41–49.

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Voronin, K.V. A numerical study of an MPI/OpenMP implementation based on asynchronous threads for a three-dimensional splitting scheme in heat transfer problems. J. Appl. Ind. Math. 8, 436–443 (2014). https://doi.org/10.1134/S199047891403017X

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  • DOI: https://doi.org/10.1134/S199047891403017X

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