Basic HTML version of Foils prepared 19 September 98

Foil 35 Blocking Receive: MPI_RECV(Fortran)

From MPI Message Passing Interface Computational Science for Simulations -- Fall Semester 1998. by Geoffrey C. Fox, Nancy McCracken
call MPI_RECV(
  • IN start_of_buffer Address of place to store data(address is Input -- values of data are of course output starting at this address!)
  • IN buffer_len Maximum number of items allowed
  • IN datatype Type of each data type
  • IN source_rank Processor number (rank) of source
  • IN tag only accept messages with this tag value
  • IN communicator Communicator of both sender and receiver group
  • OUT return_status Data structure describing what happened!
  • OUT error_message) Error Flag (absent in C)
Note that return_status is used after completion of receive to find actual received length (buffer_len is a maximum length allowed), actual source processor source_ rank and actual message tag

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