Argonne National Laboratory

Performance Analysis on the IBM Blue Gene/P for Wakefield Calculations

TitlePerformance Analysis on the IBM Blue Gene/P for Wakefield Calculations
Publication TypeConference Paper
Year of Publication2011
AuthorsMin, MS, Fischer, PF
Conference NameProceedings of 2011 Particle Accelerator Conference
Date Published04/2011
PublisherPAC'11 OC/IEEE
Conference LocationNew York, NY, USA
Other NumbersANL/mCS-P1870-0411

Accurate and efficient simulations will significantly reduce the cost and the risk in the design process for various applications in accelerator design. We improved capability of the Argonne-developed high-fidelity wakefield simulation code, NekCEM, by upgrading pre-setup and communication subroutines for high-performance simulations beyond petascale. We present a detailed study of parallel performance of NekCEM on the IBM Blue Gene/P at Argonne. We demonstrate strong scaling up to P=131,072 cores using up to more than 1.1 billion grid points with the total number of elements up to E=273,000 and N=15 which gives 75% efficiency at 8,530 grid points per core compared to the base case of P=16,384 cores.