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Applying parallel direct solver skills to build robust and highly performant preconditioners

Pascal Hénon 1 Francois Pellegrini 1, 2 Pierre Ramet 1, 2 Jean Roman 1, 2 Yousef Saad 3, 4
1 SCALAPPLIX - Algorithms and high performance computing for grand challenge applications
CNRS - Centre National de la Recherche Scientifique : UMR5800, École Nationale Supérieure d'Électronique, Informatique et Radiocommunications de Bordeaux (ENSEIRB), Inria Bordeaux - Sud-Ouest, Université Sciences et Technologies - Bordeaux 1, Université Bordeaux Segalen - Bordeaux 2
Abstract : The purpose of our work is to provide a method which exploits the parallel blockwise algorithmic approach used in the framework of high performance sparse direct solvers in order to develop robust preconditioners based on a parallel incomplete factorization. The idea is then to define an adaptive blockwise incomplete factorization that is much more accurate (and numerically more robust) than the scalar incomplete factorizations commonly used to precondition iterative solvers.
keyword : Sparse
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Conference papers
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Contributor : Pierre Ramet <>
Submitted on : Thursday, December 11, 2008 - 8:43:53 PM
Last modification on : Saturday, February 27, 2021 - 4:02:05 PM


  • HAL Id : inria-00346623, version 1



Pascal Hénon, Francois Pellegrini, Pierre Ramet, Jean Roman, Yousef Saad. Applying parallel direct solver skills to build robust and highly performant preconditioners. PARA'04, 2004, Copenhagen, Denmark. pp.601--619. ⟨inria-00346623⟩



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