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GAMER with out-of-core computation

Hsi-Yu Schive, Yu-Chih Tsai, Tzihong Chiueh
Department of Physics, National Taiwan University, 106, Taipei, Taiwan, R.O.C.
arXiv:1007.3818v1 [astro-ph.IM] (22 Jul 2010)

@article{schive2010gamer,

   title={GAMER with out-of-core computation},

   author={Schive, H.Y. and Tsai, Y.C. and Chiueh, T.},

   journal={Arxiv preprint arXiv:1007.3818},

   year={2010}

}

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GAMER is a GPU-accelerated Adaptive-MEsh-Refinement code for astrophysical simulations. In this work, two further extensions of the code are reported. First, we have implemented the MUSCL-Hancock method with the Roe’s Riemann solver for the hydrodynamic evolution, by which the accuracy, overall performance and the GPU versus CPU speed-up factor are improved. Second, we have implemented the out-of-core computation, which utilizes the large storage space of multiple hard disks as the additional run-time virtual memory and permits an extremely large problem to be solved in a relatively small-size GPU cluster. The communication overhead associated with the data transfer between the parallel hard disks and the main memory is carefully reduced by overlapping it with the CPU/GPU computations.
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