DragonFly On-Line Manual Pages
MPI_T_finalize(3) MPI MPI_T_finalize(3)
MPI_T_finalize - Finalize the MPI tool information interface
This routine may be called as often as the corresponding
MPI_T_init_thread() routine up to the current point of execution.
Calling it more times returns a corresponding error code. As long as
the number of calls to MPI_T_finalize() is smaller than the number of
calls to MPI_T_init_thread() up to the current point of execution, the
MPI tool information interface remains initialized and calls to its
routines are permissible. Further, additional calls to
MPI_T_init_thread() after one or more calls to MPI_T_finalize() are
permissible. Once MPI_T_finalize() is called the same number of times
as the routine MPI_T_init_thread() up to the current point of
execution, the MPI tool information interface is no longer initialized.
The interface can be reinitialized by subsequent calls to
At the end of the program execution, unless MPI_Abort() is called, an
application must have called MPI_T_init_thread() and MPI_T_finalize()
an equal number of times.
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-
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.
- No error; MPI routine completed successfully.
- The MPI tool information interface is not initialized.