HTML version of Scripted Foils prepared 11 November 1996

Foil 5 Some Key Features of MPI

From CPS615-Initial Lecture on MPI ending with discussion of basic MPI_SEND Delivered Lectures of CPS615 Basic Simulation Track for Computational Science -- 31 October 96. by Geoffrey C. Fox *
Secs 185.7
1 Point to Point Message Passing
2 Collective Communication -- messages between >2 simultaneous processes
3 Support for Process Groups -- messaging in subsets of processors
4 Support for communication contexts -- general specification of message labels and ensuring unique to a set of routines as in a precompiled library
  • Note a communicator incorporates contexts and groups as single data structure and defines the scope of communication operation
5 Support for application (virtual) topologies analogous to distribution types in HPF
6 Inquiry routines to find out about environment such as number of processors
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