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GTC ON-DEMAND

Computational Physics
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Solar Storm Modeling using OpenACC: From HPC Cluster to "In-House"
Abstract:
We explore using OpenACC to migrate applications required for modeling solar storms from CPU HPC clusters to an "in-house" multi-GPU system. We describe the software pipeline and the utilization of OpenACC in the computationally heavy codes. A major step forward is the initial implementation of OpenACC in our Magnetohydrodynamics code MAS. Strategies for overcoming some of the difficulties encountered are discussed, including handling Fortran derived types, array reductions, and performance tuning. Production-level "time-to-solution" results will be shown for multi-CPU and multi-GPU systems of various sizes. The timings show that it is possible to achieve acceptable "time-to-solution"s on a single multi-GPU server/workstation for problems that previously required using multiple HPC CPU-nodes.
 
Topics:
Computational Physics, HPC and Supercomputing
Type:
Talk
Event:
GTC Silicon Valley
Year:
2018
Session ID:
S8847
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