Manpages - MPI_Wtick.3
Table of Contents
NAME
MPI_Wtick - Returns the resolution of MPI_Wtime.
SYNTAX
C Syntax
#include <mpi.h> double MPI_Wtick()
Fortran Syntax
USE MPI ! or the older form: INCLUDE 'mpif.h' DOUBLE PRECISION MPI_WTICK()
Fortran 2008 Syntax
USE mpi_f08 DOUBLE PRECISION MPI_WTICK()
C++ Syntax
#include <mpi.h> double MPI::Wtick()
RETURN VALUE
Time in seconds of resolution of MPI_Wtime.
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.
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
MPI_Wtime