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QPACE 2 and Domain Decomposition on the Intel Xeon Phi

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arxiv 1502.04025 v1 pith:FC2OEX5R submitted 2015-02-13 cs.DC hep-latphysics.comp-ph

Paul Arts , Jacques Bloch , Peter Georg , Benjamin Glaessle , Simon Heybrock , Yu Komatsubara , Robert Lohmayer , Simon Mages
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Bernhard Mendl Nils Meyer Alessio Parcianello Dirk Pleiter Florian Rappl Mauro Rossi Stefan Solbrig Giampietro Tecchiolli Tilo Wettig Gianpaolo Zanier
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classification cs.DChep-latphysics.comp-ph
keywords xeongiveintelqpacebenchmarkscodecollaborationcustom-designed
verification ladder T0 review T1 audit T2 compute T3 formal
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We give an overview of QPACE 2, which is a custom-designed supercomputer based on Intel Xeon Phi processors, developed in a collaboration of Regensburg University and Eurotech. We give some general recommendations for how to write high-performance code for the Xeon Phi and then discuss our implementation of a domain-decomposition-based solver and present a number of benchmarks.

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