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22-28 July 2018
Kellogg Hotel and Conference Center
EST timezone

Three Dirac operators on two architectures

Jul 23, 2018, 5:10 PM
103 (Kellogg Hotel and Conference Center)


Kellogg Hotel and Conference Center

219 S Harrison Rd, East Lansing, MI 48824
Algorithms and Machines Algorithms and Machines


Dr Stephan DURR (University of Wuppertal)


A simple minded approach to implement three discretizations of the Dirac operator (Brillouin, Wilson, staggered) on two architectures (KNL and core_i7) is presented. The idea is to use a high-level compiler along with OpenMP parallelization and SIMD pragmas, but to stay away from cache-line optimization and/or assembly-tuning. The implementation is for Nv right-hand-sides, and this extra index is used to fill the SIMD pipeline. On one KNL node single precision performance figures for Nc=3, Nv=12 read 640 Gflop/s, 320 Gflop/s, and 520 Gflop/s for the three discretization schemes, respectively.

Primary author

Dr Stephan DURR (University of Wuppertal)

Presentation Materials