Evaluating Performance of OpenMP and MPI on the SGI Origin 2000 With Benchmarks of Realistic Problem Sizes

Abstract

Six application benchmarks, including four numerical aerodynamic simulation (NAS) codes, provided by H. Jin and J. Wu, were previously parallelized using OpenMP and message-passing interface (MPI) and run on a 128-processor Silicon Graphics Inc. (SGI) Origin 2000. Detailed profile data were collected to understand the factors causing imperfect scalability. The results show that load imbalance and cost of remote accesses are the main factors in limited speedup of the OpenMP versions, whereas communication costs are the single major factor in the performance of the MPI versions.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2000
Accession Number
ADA383931

Entities

People

  • Csaba K. Zoltani
  • Dixie Hisley
  • Punyam Satya-narayana

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Central Processing Units
  • Computational Fluid Dynamics
  • Computer Programming
  • Computers
  • Department Of Defense
  • Directives
  • Environment
  • Floating Point Operations
  • Fluid Dynamics
  • High Performance Computing
  • Large Eddy Simulation
  • Military Research
  • Parallel Computing
  • Parallel Processing
  • Scalability
  • Simulations

Readers

  • Computational Fluid Dynamics (CFD)
  • Software Verification and Validation.
  • Theoretical Analysis.