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<H2><A NAME="SECTION00087000000000000000">
psb_barrier -- Sinchronization point parallel
environment</A>
<H2><A NAME="SECTION00086000000000000000">
psb_wtime -- Wall clock timing</A>
</H2>
<P>
<PRE>
call psb_barrier(icontxt)
time = psb_wtime()
</PRE>
<P>
This subroutine acts as an explicit synchronization point for the PSBLAS
parallel virtual machine.
This function returns a wall clock timer. The resolution of the timer
is dependent on the underlying parallel environment implementation.
<DL>
<DT><STRONG>Type:</STRONG></DT>
<DD>Synchronous.
<DD>Asynchronous.
</DD>
<DT><STRONG><B>On Entry </B></STRONG></DT>
<DT><STRONG><B>On Exit </B></STRONG></DT>
<DD>
</DD>
<DT><STRONG>icontxt</STRONG></DT>
<DD>the communication context identifying the virtual
parallel machine.
<DT><STRONG>Function value</STRONG></DT>
<DD>the elapsed time in seconds.
<BR>
Scope: <B>global</B>.
<BR>
Type: <B>required</B>.
<BR>
Intent: <B>in</B>.
<BR>
Specified as: an integer variable.
Returned as: a <code>real(psb_dpk_)</code> variable.
</DD>
</DL>