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.. _mpi_wtick:
MPI_Wtick
=========
.. include_body
:ref:`MPI_Wtick` |mdash| Returns the resolution of :ref:`MPI_Wtime`.
SYNTAX
------
C Syntax
^^^^^^^^
.. code-block:: c
#include <mpi.h>
double MPI_Wtick()
Fortran Syntax
^^^^^^^^^^^^^^
.. code-block:: fortran
USE MPI
! or the older form: INCLUDE 'mpif.h'
DOUBLE PRECISION MPI_WTICK()
Fortran 2008 Syntax
^^^^^^^^^^^^^^^^^^^
.. code-block:: fortran
USE mpi_f08
DOUBLE PRECISION MPI_WTICK()
RETURN VALUE
------------
Time in seconds of resolution of :ref:`MPI_Wtime`.
DESCRIPTION
-----------
:ref:`MPI_Wtick` returns the resolution of :ref:`MPI_Wtime` in seconds. That is, it
returns, as a double-precision value, the number of seconds between
successive clock ticks. For example, if the clock is implemented by the
hardware as a counter that is incremented every millisecond, the value
returned by :ref:`MPI_Wtick` should be 10^-3.
NOTE
----
This function does not return an error value. Consequently, the result
of calling it before :ref:`MPI_Init` or after :ref:`MPI_Finalize` is undefined.
.. seealso::
* :ref:`MPI_Wtime`
|
