NAME

       MPI_Wtick - Returns the resolution of MPI_Wtime.

SYNTAX

C Syntax

       #include <mpi.h>
       double MPI_Wtick()

Fortran Syntax

       INCLUDE 'mpif.h'
       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 that on POSIX platforms, Open MPI should always  return  10^-6  for  MPI_Wtick.   The
       returned value may be different on Windows platforms.

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