NAME

       MPI_Comm_dup_with_info  -   Duplicates  an  existing  communicator  with  all  its  cached
       information

SYNOPSIS

       int MPI_Comm_dup_with_info(MPI_Comm comm, MPI_Info info, MPI_Comm * newcomm)

INPUT PARAMETERS

       comm   - Communicator to be duplicated (handle)
       info   - info object (handle)

OUTPUT PARAMETERS

       newcomm
              - A new communicator over the same group as comm but with a new context. See notes.
              (handle)

NOTES

       MPI_COMM_DUP_WITH_INFO  behaves  exactly  as  MPI_COMM_DUP  except  that  the  info  hints
       associated with the communicator comm are not duplicated in newcomm.  The  hints  provided
       by the argument info are associated with the output communicator newcomm instead.

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 ).

SEE ALSO

       MPI_Comm_dup, MPI_Comm_free, MPI_Keyval_create,
       MPI_Attr_put,      MPI_Attr_delete,       MPI_Comm_create_keyval,       MPI_Comm_set_attr,
       MPI_Comm_delete_attr

LOCATION

       src/mpi/comm/comm_dup_with_info.c

                                            4/24/2013                   MPI_Comm_dup_with_info(3)