mpi_comm_spawn(3) [sunos man page]

MPI_Comm_spawn(3)                                                       MPI                                                      MPI_Comm_spawn(3)

NAME

       MPI_Comm_spawn -  Spawn up to maxprocs instances of a single MPI application

SYNOPSIS

       int MPI_Comm_spawn(char *command, char *argv[], int maxprocs, MPI_Info info,
                         int root, MPI_Comm comm, MPI_Comm *intercomm,
                         int array_of_errcodes[])

INPUT PARAMETERS

       command
              - name of program to be spawned (string, significant only at root)
       argv   - arguments to command (array of strings, significant only at root)
       maxprocs
              - maximum number of processes to start (integer, significant only at root)
       info   - a set of key-value pairs telling the runtime system where and how to start the processes (handle, significant only at root)
       root   - rank of process in which previous arguments are examined (integer)
       comm   - intracommunicator containing group of spawning processes (handle)

OUTPUT PARAMETERS

       intercomm
              - intercommunicator between original group and the newly spawned group (handle)
       array_of_errcodes
              - one code per process (array of integer)

THREAD AND INTERRUPT SAFETY

       This  routine  is  thread-safe.  This means that this routine may be safely used by multiple threads without the need for any user-provided
       thread locks.  However, the routine is not interrupt safe.  Typically, this is due to the use of memory allocation routines such as  malloc
       or other non-MPICH runtime routines that are themselves not interrupt-safe.

NOTES FOR FORTRAN

       All  MPI  routines in Fortran (except for MPI_WTIME and MPI_WTICK ) have an additional argument ierr at the end of the argument list.  ierr
       is an integer and has the same meaning as the return value of the routine in C.  In Fortran, MPI routines are subroutines, and are  invoked
       with the call statement.

       All MPI objects (e.g., MPI_Datatype , MPI_Comm ) are of type INTEGER in Fortran.

ERRORS

       All  MPI  routines (except MPI_Wtime and MPI_Wtick ) return an error value; C routines as the value of the function and Fortran routines in
       the last argument.  Before the value is returned, the current MPI error handler is called.  By default, this error handler aborts  the  MPI
       job.   The  error  handler  may  be  changed  with  MPI_Comm_set_errhandler  (for  communicators), MPI_File_set_errhandler (for files), and
       MPI_Win_set_errhandler (for RMA windows).  The MPI-1 routine MPI_Errhandler_set may be used but its  use  is  deprecated.   The  predefined
       error handler MPI_ERRORS_RETURN may be used to cause error values to be returned.  Note that MPI does not guarentee that an MPI program can
       continue past an error; however, MPI implementations will attempt to continue whenever possible.

       MPI_SUCCESS
              - No error; MPI routine completed successfully.
       MPI_ERR_COMM
              - Invalid communicator.  A common error is to use a null communicator in a call (not even allowed in MPI_Comm_rank ).
       MPI_ERR_ARG
              - Invalid argument.  Some argument is invalid and is not identified by a specific error class (e.g., MPI_ERR_RANK ).
       MPI_ERR_INFO
              - Invalid Info
       MPI_ERR_SPAWN
              -

LOCATION

       comm_spawn.c

                                                                     7/27/2010                                                   MPI_Comm_spawn(3)