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<H1 id="MPI_Wtime">MPI_Wtime</H1>
Returns an elapsed time on the calling processor
<H2>Synopsis</H2>
<PRE>
double MPI_Wtime(void)
</PRE>
<H2>Return value</H2>
Time in seconds since an arbitrary time in the past.
<P>
<H2>Notes</H2>
This is intended to be a high-resolution, elapsed (or wall) clock.
See <tt>MPI_WTICK</tt> to determine the resolution of <tt>MPI_WTIME</tt>.
If the attribute <tt>MPI_WTIME_IS_GLOBAL</tt> is defined and true, then the
value is synchronized across all processes in <tt>MPI_COMM_WORLD</tt>.
<P>
<H2>Notes for Fortran</H2>
This is a function, declared as <tt>DOUBLE PRECISION MPI_WTIME()</tt> in Fortran.
<P>
<H2>See Also</H2>
also: MPI_Wtick, MPI_Comm_get_attr, MPI_Attr_get
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