Plane Wave First-principles Materials Science Codes on Multicore Supercomputer Architectures

ORAL

Abstract

Plane wave first-principles codes based on 3D FFTs are one of the largest users of supercomputer cycles in the world. Modern supercomputer architectures are constructed from chips having many CPU cores with nodes containing multiple chips. Designs for future supercomputers are projected to have even more cores per chip. I will present new developments for hybrid MPI/OpenMP PW codes focusing on a specialized 3D FFTs that gives greatly improved scaling over a pure MPI version on multicore machines. Scaling results will be presented for the full electronic structure codes PARATEC and BerkeleyGW. using the new hybrid 3D FFTs, threaded libraries and OpenMP to gain greatly improved scaling to very large core count on Cray and IBM machines.

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Authors

  • Andrew Canning

    Lawrence Berkeley National Lab, Computational Research Division, Lawrence Berkeley National Laboratory

  • Jack Deslippe

    National Energy Research Scientific Computing Center, Lawrence Berkeley National Laboratory

  • Steven.G. Louie

    Department of Physics, University of California at Berkeley and Materials Sciences Division, Lawrence Berkeley National Laboratory, UC Berkeley physics/ LBNL MSD, Dept. of Physics UC Berkeley and Lawrence Berkeley National Lab, University of California - Berkeley, Lawrence Berkeley National Laboratory, Physics Department, UC Berkeley and Lawrence Berkeley National Lab, University of California at Berkeley, University of California, Berkeley, UC Berkeley and Lawrence Berkeley National Laboratory, Univ of California - Berkeley, Dept. of Physics, University of California, Berkeley and Materials Science Division, Lawrence Berkeley National Laboratory