MPI_Comm_set_info - Set new values for the hints of the communicator associated with comm

       All  MPI routines (except MPI_Wtime and MPI_Wtick )returnanerrorvalue; 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   (forcommunicators),   MPI_File_set_errhandler   (forfiles),and
       MPI_Win_set_errhandler  (for  RMA windows).  The MPI-1 routine MPI_Errhandler_set maybeusedbut its use
       is deprecated.  The predefined error handler MPI_ERRORS_RETURN maybeusedtocauseerrorvaluestobereturned.   Note that MPI does not guarantee 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_INFO
              - Invalid Info
       MPI_ERR_OTHER
              - Other error; use MPI_Error_string togetmoreinformation about this error code.

                                                    1/21/2022                               MPI_Comm_set_info(3)

comm   - communicator (handle)
       info   - info object (handle)

       MPI_Comm_set_info -  Set new values for the hints of the communicator associated with comm

       The  call  is  collective on the group of comm. The info object may be different on each process, but any
       info entries that an implementation requires to be the same on all processes must appear  with  the  same
       value in each process infoobject.

       All MPI routines in Fortran (except for MPI_WTIME and MPI_WTICK )have an additional argument ierr attheendoftheargumentlist.  ierr isanintegerandhasthesamemeaningasthereturnvalueoftheroutine
       in C.  In Fortran, MPI routines are subroutines, and are invoked with the call statement.

       All MPI objects (e.g., MPI_Datatype , MPI_Comm )areoftype INTEGER inFortran.

       #ifdef ENABLE_QMPI
       #ifndef MPICH_MPI_FROM_PMPI
       int QMPI_Comm_set_info(QMPI_Context context, int tool_id, MPI_Comm comm,
       MPI_Info info) MPICH_API_PUBLIC

       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 orothernon-MPICHruntimeroutinesthatarethemselvesnotinterrupt-safe.