Publication Type
Journal
Journal Name
Concurrency and Computation: Practice and Experience
Publication Date
Page Numbers
573 to 587
Volume
22
Issue
5
Abstract
This paper describes our effort for enhancing the performance of the AORSA fusion energy
simulation program through the use of High Performance Linpack (HPL) benchmark, commonly used
in ranking the top 500 supercomputers. The algorithm used by HPL, enhanced by a set of tuning
options, is more effective than that found in the ScaLAPACK library. However, HPL is configured
as a benchmark, and only for real-valued coefficients. We therefore converted HPL for use within
an application program that generates complex coefficient linear systems. The result is a significant
increase in performance of the solver when simulating the highest resolution experiments thus far
configured, achieving 87.5 TFLOPS on over 20,000 processors on the Cray XT4.