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A semi-Automatic Approach for Parallel Problem Solving using the Multi-BSP Model

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Abstract

The Multi-Bulk Synchronous Parallel (Multi-BSP) model is a recently proposed parallel programming model for multicore machines that extends the classic Bulk Synchronous Parallel model. Multi-BSP aims to be a useful model to design algorithms and estimate their running time. This model heavily relies on the right computation of parameters that characterize the hardware. Of course, the hardware utilization also depends on the specific features of the problems and the algorithms applied to solve them. This article introduces a semi-automatic approach for solving problems applying parallel algorithms using the Multi-BSP model. First, the specific multicore computer to use is characterized by applying an automatic procedure. After that, the hardware architecture discovered in the previous step is considered in order to design a portable parallel algorithm. Finally, a fine tuning of parameters is performed to improve the overall efficiency. We propose a specific benchmark for measuring the parameters that characterize the communication and synchronization costs in a particular hardware. Our approach discovers the hierarchical structure of the multicore architecture and compute both parameters for each level that can share data and make synchronizations between computing units. A second contribution of our research is a proposal for a Multi-BSP engine. It allows designing algorithms by applying a recursive methodology over the hierarchical tree already built by the benchmark, focusing on three atomic functions based in a divide-and-conquer strategy. The validation of the proposed method is reported, by studying an algorithm implemented in a prototype of the Multi-BSP engine, testing different parameter configurations that best fit to each problem and using three different high-performance multicore computers.

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Authors and Affiliations

  1. Universidad de la República Herrera y Reissig 565, Montevideo, Uruguay

    M. Alaniz & S. Nesmachnow

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  1. M. Alaniz
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  2. S. Nesmachnow
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Correspondence to M. Alaniz or S. Nesmachnow.

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Alaniz, M., Nesmachnow, S. A semi-Automatic Approach for Parallel Problem Solving using the Multi-BSP Model. Program Comput Soft 45, 517–531 (2019). https://doi.org/10.1134/S0361768819080103

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  • DOI: https://doi.org/10.1134/S0361768819080103

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