Simulation of 1+1 dimensional surface growth and lattices gases using GPUs

Details Simulation of 1+1 dimensional surface growth and lattices gases using GPUs Simulation of 1+1 dimensional surface growth and lattices gases using GPUs

2010-12-02

arxiv.org/abs/1012.0385v2

Computer Physics Communications 182 (2011) 1467-1476

Physics

Computational Physics

20 pages 12 figures, 1 table, to appear in Comp. Phys. Comm

Scientific paper

10.1016/j.cpc.2011.03.016

Restricted solid on solid surface growth models can be mapped onto binary lattice gases. We show that efficient simulation algorithms can be realized on GPUs either by CUDA or by OpenCL programming. We consider a deposition/evaporation model following Kardar-Parisi-Zhang growth in 1+1 dimensions related to the Asymmetric Simple Exclusion Process and show that for sizes, that fit into the shared memory of GPUs one can achieve the maximum parallelization speedup ~ x100 for a Quadro FX 5800 graphics card with respect to a single CPU of 2.67 GHz). This permits us to study the effect of quenched columnar disorder, requiring extremely long simulation times. We compare the CUDA realization with an OpenCL implementation designed for processor clusters via MPI. A two-lane traffic model with randomized turning points is also realized and the dynamical behavior has been investigated.

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