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A 3D radiative transfer framework. VIII. OpenCL implementation

P. H. Hauschildt, E. Baron
Hamburger Sternwarte, Gojenbergsweg 112, 21029 Hamburg, Germany
Astronomy and Astrophysics, Volume 533, A127, 2011

@article{hauschildt2011radiative,

   author={Hauschildt, P. H.} and {Baron, E.},

   encoding={tex},

   title={A 3D radiative transfer framework. VIII. OpenCL implementation},

   DOI={"10.1051/0004-6361/201117051"},

   url={"http://dx.doi.org/10.1051/0004-6361/201117051"},

   journal={A&A},

   year={2011},

   volume={533},

   pages={"A127"}

}

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AIMS: We discuss an implementation of our 3D radiative transfer (3DRT) framework with the OpenCL paradigm for general GPU computing. METHODS: We implemented the kernel for solving the 3DRT problem in Cartesian coordinates with periodic boundary conditions in the horizontal (x,y) plane, including the construction of the nearest neighbor ^* and the operator splitting step. RESULTS: We present the results of both a small and a large test case and compare the timing of the 3DRT calculations for serial CPUs and various GPUs. CONCLUSIONS: The latest available GPUs can lead to significant speedups for both small and large grids compared to serial (single core) computations.
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