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| Paper: |
The Reduced Magnetohydrodynamics Coronal Tectonics Code: Implementation on GPU
Accelerated Machines |
| Volume: |
459, 6th International Conference of Numerical Modeling of Space Plasma Flows (ASTRONUM 2011) |
| Page: |
222 |
| Authors: |
Lin, L.; Ng, C.-S.; Bhattacharjee, A. |
| Abstract: |
We have recently carried out a computational campaign to investigate a model
of coronal heating in three-dimensions using reduced magnetohydrodynamics
(RMHD). Our code is built on a conventional scheme using the pseudo-spectral method,
and is parallelized using MPI. The current investigation
requires very long time integrations using high Lundquist numbers, where the
formation of very fine current layers challenge the resolutions achievable
even on massively parallel machines. We present here results of a port to
Nvidia CUDA (Compute Unified Device Architecture) for hardware acceleration
using graphics processing units (GPUs). In addition to a brief discussion of
our general strategy, we will report code performance on several machines
which span a variety of hardware configurations and capabilities. These
include a dedicated research workstation equipped with four Nvidia C2050 GPUs,
as well as several large-scale GPU accelerated distributed memory machines: Lincoln/NCSA,
Dirac/NERSC, and Keeneland/NICS. |
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