17.2.466. MPI_Wtick
MPI_Wtick — Returns the resolution of MPI_Wtime.
17.2.466.1. SYNTAX
17.2.466.1.1. C Syntax
#include <mpi.h>
double MPI_Wtick()
17.2.466.1.2. Fortran Syntax
USE MPI
! or the older form: INCLUDE 'mpif.h'
DOUBLE PRECISION MPI_WTICK()
17.2.466.1.3. Fortran 2008 Syntax
USE mpi_f08
DOUBLE PRECISION MPI_WTICK()
17.2.466.2. RETURN VALUE
Time in seconds of resolution of MPI_Wtime.
17.2.466.3. DESCRIPTION
MPI_Wtick returns the resolution of 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 MPI_Wtick should be 10^-3.
17.2.466.4. NOTE
This function does not return an error value. Consequently, the result of calling it before MPI_Init or after MPI_Finalize is undefined.
See also