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/sowing/sowing.tar.gz ), the initial formatting, and some initial text for most of the MPI-1 man pages.

LOCATION¶

wtime.c