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Benchmarking GPU and CPU codes for Heisenberg spin glass overrelaxation

M. Bernaschi, G. Parisi, L. Parisi
Istituto Applicazioni Calcolo, CNR, Viale Manzoni, 30 – 00185 Rome, Italy
Computer Physics Communications (03 March 2011)

@article{Bernaschi2011,

   title={“Benchmarking GPU and CPU codes for Heisenberg spin glass overrelaxation”},

   journal={“Computer Physics Communications”},

   volume={“InPress},

   number={“”},

   pages={“-“},

   year={“2011”},

   note={“”},

   issn={“0010-4655”},

   doi={“DOI:10.1016/j.cpc.2011.02.012”},

   url={“http://www.sciencedirect.com/science/article/B6TJ5-529CNR2-3/2/d7cae37f6747ec711090bf3fa0cd8c20”},

   author={“M.Bernaschi and G.Parisi and L.Parisi”},

   keywords={“GPU”}

}

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We present a set of possible implementations for Graphics Processing Units (GPU) of the Overrelaxation technique applied to the 3D Heisenberg spin glass model. The results show that a carefully tuned code can achieve more than 100 GFlops/sec. of sustained performance and update a single spin in about 0.6 nanoseconds. A multi-hit technique that exploits the GPU shared memory further reduces this time. Such results are compared with those obtained by means of a highly-tuned vector-parallel code on latest generation multi-core CPUs.
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