Performance Analysis on the IBM Blue Gene/P for Wakefield Calculations
|Title||Performance Analysis on the IBM Blue Gene/P for Wakefield Calculations|
|Publication Type||Conference Paper|
|Year of Publication||2011|
|Authors||Min, MS, Fischer, PF|
|Conference Name||Proceedings of 2011 Particle Accelerator Conference|
|Conference Location||New York, NY, USA|
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.