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Erschienen in:
2014 | OriginalPaper | Buchkapitel
Sustained Petascale Performance of Seismic Simulations with SeisSol on SuperMUC
verfasst von : Alexander Breuer, Alexander Heinecke, Sebastian Rettenberger, Michael Bader, Alice-Agnes Gabriel, Christian Pelties
Erschienen in: Supercomputing
Verlag: Springer International Publishing
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Seismic simulations in realistic 3D Earth models require peta- or even exascale computing power to capture small-scale features of high relevance for scientific and industrial applications. In this paper, we present optimizations of SeisSol – a seismic wave propagation solver based on the Arbitrary high-order accurate DERivative Discontinuous Galerkin (ADER-DG) method on fully adaptive, unstructured tetrahedral meshes – to run simulations under production conditions at petascale performance. Improvements cover the entire simulation chain: from an enhanced ADER time integration via highly scalable routines for mesh input up to hardware-aware optimization of the innermost sparse-/dense-matrix kernels. Strong and weak scaling studies on the SuperMUC machine demonstrated up to 90% parallel efficiency and 45% floating point peak efficiency on 147k cores. For a simulation under production conditions (10
8
grid cells, 5·10
10
degrees of freedom, 5 seconds simulated time), we achieved a sustained performance of 1.09 PFLOPS.