Optimizing the domain wall fermion Dirac operator using the R-Stream source-to-source compiler
Meifeng Lin, Eric Papenhausen, M. Harper Langston, Benoît Meister, Muthu Manikandan Baskaran, Taku Izubuchi, Chulwoo Jung · arXiv (Cornell University) · 2015
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.