Basic HTML version of Foils prepared 19 September 98

Foil 5 Some Key Features of MPI

From MPI Message Passing Interface Computational Science for Simulations -- Fall Semester 1998. by Geoffrey C. Fox, Nancy McCracken


1 An MPI program defines a set of processes, each executing the same program (SPMD)
  • (usually one process per parallel computer node)
2 ... that communicate by calling MPI messaging functions
  • (point-to-point and collective)
3 ... and can be constructed in a modular fashion
  • (communication contexts are the key to MPI libraries)
4 Also
  • Support for Process Groups -- messaging in subsets of processors
  • Support for application dependent (virtual) topologies analogous to distribution types in HPF
  • Inquiry routines to find out properties of the environment such as number of processors

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