mpi_wtick(3openmpi) [osx man page]

MPI_Wtick(3OpenMPI)													       MPI_Wtick(3OpenMPI)

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 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

Open MPI 1.2							  September 2006					       MPI_Wtick(3OpenMPI)

MPI_Wtime(3)							      LAM/MPI							      MPI_Wtime(3)

NAME

       MPI_Wtime -  Returns an elapsed time on the calling processor

SYNOPSIS

       #include <mpi.h>
       double MPI_Wtime(void)

RETURN VALUE

       Time in seconds since an arbitrary time in the past.

NOTES

       This is intended to be a high-resolution, elapsed (or wall) clock.  See MPI_Wtick to determine the resolution of MPI_Wime
	.  If the attribute MPI_WTIME_IS_GLOBAL is defined and true, then the value is synchronized across all processes in MPI_COMM_WORLD
	.

NOTES FOR FORTRAN

       This function is declared as DOUBLE PRECISION MPI_WTIME() in Fortran.

SEE ALSO

       MPI_Wtick, MPI_Comm_get_attr

MORE INFORMATION

       For  more  information,	please	see the official MPI Forum web site, which contains the text of both the MPI-1 and MPI-2 standards.  These
       documents contain detailed information about each MPI function (most of which is not duplicated in these man pages).

       http://www.mpi-forum.org/

ACKNOWLEDGEMENTS

       The LAM Team would like the thank the MPICH Team for the handy program to generate man pages ("doctext" from ftp://ftp.mcs.anl.gov/pub/sow-
       ing/sowing.tar.gz ), the initial formatting, and some initial text for most of the MPI-1 man pages.

LOCATION

       wtime.c

LAM
/MPI 6.5.8							    11/10/2002							      MPI_Wtime(3)