FDTD Based Seismic Modeling and Reverse Time Migration on a GPU Cluster

Rached Abdelkhalek 1, 2 Henri Calandra 2 Olivier Coulaud 1, 3 Guillaume Latu 4 Jean Roman 1, 3
1 HiePACS - High-End Parallel Algorithms for Challenging Numerical Simulations
LaBRI - Laboratoire Bordelais de Recherche en Informatique, Inria Bordeaux - Sud-Ouest
4 CALVI - Scientific computation and visualization
IRMA - Institut de Recherche Mathématique Avancée, LSIIT - Laboratoire des Sciences de l'Image, de l'Informatique et de la Télédétection, Inria Nancy - Grand Est, IECL - Institut Élie Cartan de Lorraine
Abstract : We have designed a fast parallel simulator that solves the acoustic wave equation on a GPU cluster. Solving the acoustic wave equation in an oil exploration industrial context aims at speeding up seismic modeling and Reverse Time Migration. We use a finite difference approach on a regular mesh, in both 2D and 3D cases. The acoustic wave equation is solved in either a constant density or a variable density domain. We use CUDA to take advantage of the GPUs computational power. We study different implementations and their impact on the application performance. We obtain a speedup of 11 for Reverse Time Migration and up to 30 for the modeling application over a sequential code running on general purpose CPU.
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Rached Abdelkhalek, Henri Calandra, Olivier Coulaud, Guillaume Latu, Jean Roman. FDTD Based Seismic Modeling and Reverse Time Migration on a GPU Cluster. 9th International Conference on Mathematical and Numerical Aspects of Waves Propagation - Waves 2009, 2009, Pau, France. ⟨inria-00407782⟩

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