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arXiv · 1701.07452

WOMBAT: A Scalable and High Performance Astrophysical MHD Code

Peter Mendygral·Nick Radcliffe·Krishna Kandalla·David Porter·Brian J. O'Neill·Chris Nolting·Paul Edmon·Julius M. F. Donnert·Thomas W. Jones
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Abstract

We present a new code for astrophysical magneto-hydrodynamics specifically designed and optimized for high performance and scaling on modern and future supercomputers. We describe a novel hybrid OpenMP/MPI programming model that emerged from a collaboration between Cray, Inc. and the University of Minnesota. This design utilizes MPI-RMA optimized for thread scaling, which allows the code to run extremely efficiently at very high thread counts ideal for the latest generation of the multi-core and many-core architectures. Such performance characteristics are needed in the era of "exascale" computing. We describe and demonstrate our high-performance design in detail with the intent that it may be used as a model for other, future astrophysical codes intended for applications demanding exceptional performance.

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Peter Mendygral, Nick Radcliffe, Krishna Kandalla, David Porter, Brian J. O'Neill, Chris Nolting, Paul Edmon, Julius M. F. Donnert, Thomas W. Jones. 2017-01-25. WOMBAT: A Scalable and High Performance Astrophysical MHD Code. https://doi.org/10.3847/1538-4365/aa5b9c

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