MPI_WTICK(3)					     Open MPI					      MPI_WTICK(3)

MPI_Wtick — Returns the resolution of MPI_Wtime <#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()

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:

	  • MPI_Wtime <#mpi-wtime>

Copyright
       2003-2026, The Open MPI Community

						   Mar 05, 2026					      MPI_WTICK(3)
