Issue No. 06 - Nov.-Dec. (2014 vol. 16)
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/MCSE.2014.79
Steven H. Langer , Lawrence Livermore National Laboratory
Abhinav Bhatele , Lawrence Livermore National Laboratory
Charles H. Still , Lawrence Livermore National Laboratory
The laser-plasma interaction code pF3D is used to simulate laser-plasma interactions in National Ignition Facility experiments. This article describes the optimizations performed on pF3D to enable scaling to a million or more processes. The authors begin with a brief description of NIF experiments and then describe pF3D with a focus on the features that are needed to get good performance at scale. The performance of message passing, disk I/O, and code steering are key issues that impact scalability and are discussed in detail. Scaling studies on IBM Blue Gene/L, IBM Blue Gene/P, Cray XE6, and IBM Blue Gene/Q systems are used as examples. The article concludes with a comparison of the backscattered light measured in NIF experiments and computed in the pF3D simulation.
Message passing, Laser beams, Plasma physics, Particle beams, Surface emitting lasers, Message systems, Ignition, Physics, High performance computing,scientific computing, metrics/measurement, performance measures, simulation, physics, high-performance computing, HPC, leadership computing, plasma physics, parallel I/O, MPI, message passing
Steven H. Langer, Abhinav Bhatele, Charles H. Still, "pF3D Simulations of Laser-Plasma Interactions in National Ignition Facility Experiments", Computing in Science & Engineering, vol. 16, no. , pp. 42-50, Nov.-Dec. 2014, doi:10.1109/MCSE.2014.79