MPI's Non-Blocking Operations


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Non-blocking operations return (immediately) ``request handles'' that can be waited on and queried:

  • MPI_Isend(start, count, datatype, dest, tag, comm, request)
  • MPI_Irecv(start, count, datatype, dest, tag, comm, request)
  • MPI_Wait(request, status)
    One can also test without waiting: MPI_Test( request, flag, status)


    Up: Buffering issues Next: Multiple completions Previous: Some Solutions to the ``Unsafe'' Problem