Basic HTML version of Foils prepared 19 September 98

Foil 26 MPI_Init -- Environment Management

From MPI Message Passing Interface Computational Science for Simulations -- Fall Semester 1998. by Geoffrey C. Fox, Nancy McCracken
This MUST be called to set up MPI before any other MPI routines may be called
For C: int MPI_Init(int *argc, char **argv[] )
  • argc and argv[] are conventional C main routine arguments
  • As usual MPI_Init returns an error
For Fortran: call MPI_INIT(mpierr)
  • nonzero (more pedantically values not equal to MPI_SUCCESS) values of mpierr represent errors

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