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Optimizing the domain wall fermion Dirac operator using the R-Stream source-to-source compiler

The application of the Dirac operator on a spinor field, the Dslash operation, is the most computation-intensive part of the lattice QCD simulations. It is often the key kernel to optimize to achieve maximum performance on various platforms. Here we report on a project to optimize the domain wall fermion Dirac operator in Columbia Physics System (CPS) using the R-Stream source-to-source compiler. Our initial target platform is the Intel PC clusters. We discuss the optimization strategies involved before and after the automatic code generation with R-Stream and present some preliminary benchmark results.

preprint2015arXivOpen access
Meifeng LinEric PapenhausenM. Harper LangstonBenoit MeisterMuthu BaskaranTaku IzubuchiChulwoo Jung
physics.comp-phhep-lat
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Meifeng LinEric PapenhausenM. Harper LangstonBenoit MeisterMuthu BaskaranTaku IzubuchiChulwoo Jung

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