MPI_Wtime - Returns an elapsed time on the calling
       processor


SYNOPSIS

       C:

            #include <mpi.h>

            double MPI_Wtime()

       C++:

            #include <mpi.h>

            double Wtime()

       Fortran:

            INCLUDE "mpif.h" (or USE MPI)

            DOUBLE PRECISION TIME

            TIME=MPI_WTIME()


STANDARDS

       This release implements the MPI 1.2 standard, as
       documented by the MPI Forum in the spring 1997 release of
       MPI:  A Message Passing Interface Standard.


DESCRIPTION

       The MPI_Wtime routine returns the elapsed wall-clock time
       in seconds since some time in the past on the calling
       processor.  This routine is intended to be a
       high-resolution, elapsed (or wall) clock.  See
       MPI_Wtick(3) to determine the resolution of MPI_Wtime.


RETURN VALUES

       Floating-point elapsed time in seconds.   Note that calls
       made at the same time to MPI_Wtime() on different nodes
       running the same program may yield different values.  The
       time returned is not necessarily the elapsed wall-clock
       run-time of the calling process.

       If a program is checkpointed and restarted, values
       returned by MPI_Wtime(3) following the restart may be
       smaller than those returned before the checkpoint.


SEE ALSO

       MPI_Wtick(3)



Man(1) output converted with man2html