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Rapport (Rapport De Recherche) Année : 2002

Impact of the Implementation of MPI Point-to-Point Communications on the Performance of Two General Sparse Solvers

Résumé

We examine the send and receive mechanisms of MPI and how to implement message passing robustly so that performance is not significantly affected by changes to the MPI system. We discuss this within the context of two different parallel algorithms for sparse Gaussian elimination: a multifrontal solver (MUMPS), and a supernodal one (SuperLU). The performance of our initial strategies based on simple MPI point-to-point communication primitives is very sensitive to the MPI system, particularly the way MPI buffers are used. Using more sophisticated nonblocking communication primitives improves the performance robustness and scalability, but at the cost of increased code complexity.

Domaines

Autre [cs.OH]
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Dates et versions

inria-00072216 , version 1 (23-05-2006)

Identifiants

  • HAL Id : inria-00072216 , version 1

Citer

Patrick Amestoy, Iain S. Duff, Jean-Yves L'Excellent, Xiaoye S. Li. Impact of the Implementation of MPI Point-to-Point Communications on the Performance of Two General Sparse Solvers. [Research Report] INRIA RR-4372, INRIA. 2002, pp.1-19. ⟨inria-00072216⟩
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