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Foil 13 MPI_Comm_size -- Environment Inquiry

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 24.4
1 This returns in integer size number of processes in given communicator comm (remember this specifies processor group)
2 For C: int MPI_Comm_size(MPI_Comm comm,int *size)
3 For Fortran: call MPI_COMM_SIZE (comm,size,mpierr)
  • where comm, size, mpierr are integers
  • comm is input; size mpierr returned
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