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Impact of the Implementation of MPI Point-to-Point Communications on the Performance of Two General Sparse Solvers
Abstract : 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.
https://hal.inria.fr/inria-00072216
Contributor : Rapport de Recherche Inria Connect in order to contact the contributor
Submitted on : Tuesday, May 23, 2006 - 8:07:45 PM
Last modification on : Saturday, February 19, 2022 - 3:35:50 AM
Long-term archiving on: : Sunday, April 4, 2010 - 10:58:47 PM
Contributor : Rapport de Recherche Inria Connect in order to contact the contributor
Submitted on : Tuesday, May 23, 2006 - 8:07:45 PM
Last modification on : Saturday, February 19, 2022 - 3:35:50 AM
Long-term archiving on: : Sunday, April 4, 2010 - 10:58:47 PM