Basic HTML version of Foils prepared August 29 98

Foil 12 Generalizing the Process Identifier in MPI

From Designing and Building Parallel Programs 3: MPI Message Passing System DoD Modernization Tutorial -- 1995-1998. by Ian Foster, Gina Goff, Ehtesham Hayder, Chuck Koelbel
1 MPI supports process groups
  • Initial "all" group
  • Group management routines
    • Split group
    • Define group from list
2 All communication takes place in groups
  • Source/destination ids refer to rank in group
  • Communicator = group + context
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