Project Team Graal

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Section: Software

MUMPS

Participants : Maurice Brémond, Guillaume Joslin, Jean-Yves L'Excellent [correspondent] , Mohamed Sid-Lakhdar, Bora Uçar.

Mumps (for MUltifrontal Massively Parallel Solver, see http://graal.ens-lyon.fr/MUMPS ) is a software package for the solution of large sparse systems of linear equations. The development of Mumps was initiated by the European project PARASOL (Esprit 4, LTR project 20160, 1996-1999), whose results and developments were public domain. Since then, research and developments have been supported by CERFACS, CNRS, ENS Lyon, INPT-ENSEEIHT-IRIT (main contributor), INRIA, and University of Bordeaux.

Mumps implements a direct method, the multifrontal method, and is a parallel code capable of exploiting distributed-memory computers; its main originalities are its performance, its numerical robustness and the wide range of functionalities available.

The latest release is Mumps 4.10.0 (May 2011). Its main new functionalities concern the determinant, the possibility to compute entries of the inverse of a sparse matrix and an option to discard factors. Some memory and performance improvements have also been obtained thanks to specific users'testcases. This year, we have also worked on generic tools and scripts for experimentation, validation and performance study.

More information on Mumps is available at http://graal.ens-lyon.fr/MUMPS/ and http://mumps.enseeiht.fr .