SCHEDULE: NOV 16-22, 2013
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Optimized Kernels for Large Scale Earthquake Simulations with SeisSol, an Unstructured ADER-DG Code
SESSION: Research Poster Reception
EVENT TYPE: Posters, Electronic Posters, and Education Posters
TIME: 5:15PM - 7:00PM
AUTHOR(S):Alexander Heinecke, Alexander Breuer, Sebastian Rettenberger, Michael Bader, Stefan Wenk, Alice Gabriel, Christian Pelties
ROOM:Mile High Pre-Function
ABSTRACT:
The software package SeisSol is one of the leading codes for earthquake scenarios, in particular for simulating dynamic rupture processes and for problems that require discretization of very complex geometries. SeisSol uses the discontinuous Galerkin (DG) method for spatial and Arbitrary high order DERivatives (ADER) for time discretization.We present optimizations for the inner, cell-local kernel routines of SeisSol, where SeisSol spends most of the total computing time. The kernels are implemented as a sequence of matrix-matrix-multiplications of a relatively small size and varying sparsity patterns (ranging from "very" sparse to dense). When running the LOH.1 benchmark, employing a 6th order space-time-discretization, in a strong scaling setting on up to 32,000 cores of SuperMUC, we achieved a maximum performance of 153 TFLOPS, which corresponds to 21.6% of the theoretical peak performance. By comparing our optimized version to the classic version of SeisSol we obtained a total application speed-up of roughly 4.5.
Chair/Author Details:
Alexander Heinecke - Technical University of Munich
Alexander Breuer - Technical University of Munich
Sebastian Rettenberger - Technical University of Munich
Michael Bader - Technical University of Munich
Stefan Wenk - Ludwig-Maximilians-Universität-München
Alice Gabriel - Ludwig-Maximilians-Universität München
Christian Pelties - Ludwig-Maximilians-Universität-München
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