GPU Accelerated Spectral Element Methods: 3D Euler equations
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Authors
Giraldo, Francis
Abdi, Daniel
Wilcox, Lucas
Warburton, Timothy
Subjects
Advisors
Date of Issue
2015-12-16
Date
December 16, 2015
Publisher
Language
Abstract
A GPU accelerated nodal discontinuous Galerkin method for the solution of
the 3D Euler equations in the Non-hydrostatic Unified Model of the Atmosphere
(NUMA) is presented. We use algorithms suitable for the single instruction multiple
thread architecture of GPUs to accelerate the dynamical core of NUMA by
two orders of magnitude relative to one core of a CPU. Tests on one node of the
Titan supercomputer yield a speedup of upto 15X on one K20x GPU relative to
that on an AMD Opteron CPU with 16 cores. The scalability of the multi-GPU
implementation is tested using 16384 GPUs, which resulted in a weak scaling efficiency
of about 90%. For portability to heterogeneous computing environment, we
used a new programming language OCCA, which can be cross-compiled to either
OpenCL, CUDA or OpenMP at runtime. Finally, the accuracy and performance
of our GPU implementations are verified using benchmark problems representative
of different scales of atmospheric dynamics.
Type
Poster
Description
Series/Report No
Department
Applied Mathematics
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Office of Naval Research through program element PE-0602435N
Oak Ridge Leadership Computing Facility supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC05-00OR22725
Oak Ridge Leadership Computing Facility supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC05-00OR22725
Funder
Office of Naval Research through program element PE-0602435N
Oak Ridge Leadership Computing Facility supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC05-00OR22725
Oak Ridge Leadership Computing Facility supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC05-00OR22725
Format
1 p.
Citation
GPU Accelerated Spectral Element Methods: 3D Euler equations
American Geophysical Union (AGU) Fall Meeting, 16 December 2015
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.