A Scalable Debugger for Massively Parallel Message-Passing Programs

  • Authors:
  • Steve Sistare;Don Allen;Rich Bowker;Karen Jourdenais;Josh Simons;Rich Title

  • Affiliations:
  • -;-;-;-;-;-

  • Venue:
  • IEEE Parallel & Distributed Technology: Systems & Technology
  • Year:
  • 1994

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Abstract

In a message-passing program, there are at least as many threads as processors, and the programmer must deal with large numbers of them on a massively parallel machine. On our target machine, the CM-5, we had previously developed Prism, a programming environment that supports debugging, data visualization, and performance analysis of data-parallel programs. We discuss how our new version, Node Prism, extends Prism's capabilities for message-passing programs. It looks and feels like the data-parallel version, but it uses new methods for user-debugger interaction that promote greater understanding of parallel programs. It offers scalable expression, execution, and interpretation of all debugging operations, making it easier to debug and understand message-passing programs.