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GTC ON-DEMAND

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Abstract:
Multiphysics and multiscale simulations are found in a variety of computational science subfields, but their disparate computational characteristics can make GPU implementations complex and often difficult. Simulations of supernovae are ideal examples of this complexity. We use the scalable FLASH code to model these astrophysical cataclysms, incorporating hydrodynamics, thermonuclear kinetics, and self-­?gravity across considerable spans in space and time. Using OpenACC and GPU-­?enabled libraries coupled to new NVIDIA GPU hardware capabilities, we have improved the physical fidelity of these simulations by increasing the number of evolved nuclear species by more than an order-­?of-­? magnitude. I will discuss these and other performance improvements to the FLASH code on the Summit supercomputer at Oak Ridge National Laboratory.
Multiphysics and multiscale simulations are found in a variety of computational science subfields, but their disparate computational characteristics can make GPU implementations complex and often difficult. Simulations of supernovae are ideal examples of this complexity. We use the scalable FLASH code to model these astrophysical cataclysms, incorporating hydrodynamics, thermonuclear kinetics, and self-­?gravity across considerable spans in space and time. Using OpenACC and GPU-­?enabled libraries coupled to new NVIDIA GPU hardware capabilities, we have improved the physical fidelity of these simulations by increasing the number of evolved nuclear species by more than an order-­?of-­? magnitude. I will discuss these and other performance improvements to the FLASH code on the Summit supercomputer at Oak Ridge National Laboratory.  Back
 
Topics:
HPC and AI, HPC and Supercomputing
Type:
Talk
Event:
GTC Silicon Valley
Year:
2018
Session ID:
S8926
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