Evaluating InfiniBand Performance with PCI Express

  • Authors:
  • Jiuxing Liu;Amith Mamidala;Abhinav Vishnu;Dhabaleswar K. Panda

  • Affiliations:
  • IBM T.J. Watson Research Center;The Ohio State University;The Ohio State University;The Ohio State University

  • Venue:
  • IEEE Micro
  • Year:
  • 2005

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Abstract

InfiniBand host channel adapters (HCAs) with PCI Express achieve 20 to 30 percent lower latency for small messages compared with HCAs using 64-bit, 133-MHz PCI-X interfaces. PCI Express also improves performance at the MPI level, achieving a latency of 4.1 µs for small messages. It can also improve MPI collective communication and bandwidth-bound MPI application performance.