Toward performance portability of the Albany finite element analysis code using the Kokkos library

Performance portability on heterogeneous high-performance computing (HPC) systems is a major challenge faced today by code developers: parallel code needs to execute correctly as well as with high performance on machines with different architectures, operating systems, and software libraries. The Fi...

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Bibliographic Details
Published in:The international journal of high performance computing applications 2018-02, Vol.33 (2)
Main Authors: Demeshko, Irina, Watkins, Jerry, Tezaur, Irina K., Guba, Oksana, Spotz, William F., Salinger, Andrew G., Pawlowski, Roger P., Heroux, Michael A.
Format: Article
Language:English
Subjects:
climate simulations
finite element code
Kokkos library
Kokkos Trilinos library
many-core programming
MATHEMATICS AND COMPUTING
performance portability
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Summary:Performance portability on heterogeneous high-performance computing (HPC) systems is a major challenge faced today by code developers: parallel code needs to execute correctly as well as with high performance on machines with different architectures, operating systems, and software libraries. The Finite Element Method (FEM) is a popular and flexible method for discretizing partial differential equations arising in a wide variety of scientific, engineering, and industry applications that require HPC. This paper presents some preliminary results pertaining to our development of a performance portable implementation of the FEM-based Albany code. Performance portability is achieved using the Kokkos library of Trilinos. We present performance results for two different physics simulations modules in Albany: the Aeras global atmosphere dynamical code and the FELIX land-ice solver. As a result, numerical experiments show that our single code implementation gives reasonable performance across two multi-core/many-core architectures: NVIDIA GPUs and multi-core CPUs.
ISSN:1094-3420
1741-2846