SYNTAX¶

#include <mpi.h>
double MPI_Wtick()

USE MPI
! or the older form: INCLUDE 'mpif.h'
DOUBLE PRECISION MPI_WTICK()

USE mpi_f08
DOUBLE PRECISION MPI_WTICK()

RETURN VALUE¶

Time in seconds of resolution of MPI_Wtime <#mpi-wtime>.

DESCRIPTION¶

MPI_Wtick returns the resolution of MPI_Wtime <#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 <#mpi-init> or after MPI_Finalize <#mpi-finalize> is undefined.

See also:

Copyright¶

2003-2025, The Open MPI Community