High performance reactive fluid flow simulations using adaptive mesh refinement on thousands of processors

  • Authors:

  • A. C. Calder;B. C. Curtis;L. J. Dursi;B. Fryxell;P. MacNeice;K. Olson;P. Ricker;R. Rosner;F. X. Timmes;H. M. Tufo;J. W. Turan;M. Zingale;G. Henry

  • Affiliations:

  • Center for Astrophysical Thermonuclear Flashes, The University of Chicago, Chicago, IL;Center for Applied Scientific Computing, Lawrence Livermore National Laboratory, Livermore, CA;Center for Astrophysical Thermonuclear Flashes, The University of Chicago, Chicago, IL;Center for Astrophysical Thermonuclear Flashes, The University of Chicago, Chicago, IL;Drexel University, Philadelphia, PA and NASA Goddard Space Flight Center, Greenbelt, MD;Center for Astrophysical Thermonuclear Flashes, The University of Chicago, Chicago, IL and NASA Goddard Space Flight Center, Greenbelt, MD;Center for Astrophysical Thermonuclear Flashes, The University of Chicago, Chicago, IL;Center for Astrophysical Thermonuclear Flashes, The University of Chicago, Chicago, IL;Center for Astrophysical Thermonuclear Flashes, The University of Chicago, Chicago, IL;Center for Astrophysical Thermonuclear Flashes, The University of Chicago, Chicago, IL;Center for Astrophysical Thermonuclear Flashes, The University of Chicago, Chicago, IL;Center for Astrophysical Thermonuclear Flashes, The University of Chicago, Chicago, IL;Intel Corporation, Santa Clara, CA

  • Venue:
  • Proceedings of the 2000 ACM/IEEE conference on Supercomputing
  • Year:
  • 2000

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Abstract

We present simulations and performance results of nuclear burning fronts in supernovae on the largest domain and at the finest spatial resolution studied to date. These simulations were performed on the Intel ASCI-Red machine at Sandia National Laboratories using FLASH, a code developed at the Center for Astrophysical Thermonuclear Flashes at the University of Chicago. FLASH is a modular, adaptive mesh, parallel simulation code capable of handling compressible, reactive fluid flows inastrophysical environments. FLASH is written primarily in Fortran 90, uses the Message-Passing Interface library for inter-processor communication and portability, and employs the PARAMESH package to manage a block-structured adaptive mesh that places blocks only where resolution is required and tracks rapidly changing flow features, such as detonation fronts, with ease. We describe the key algorithms and their implementation as well as the optimizations required to achieve sustained performance of 238 GFLOPS on 6420 processors of ASCI-Red in 64 bit arithmetic.