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psblas3:

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Updated docs.
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Salvatore Filippone
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@@ -7,8 +7,8 @@ original version by: Nikos Drakos, CBLU, University of Leeds
Jens Lippmann, Marek Rouchal, Martin Wilck and others -->
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<TITLE>psb_get_rank -- Get the MPI rank</TITLE>
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<TITLE>psb_exit -- Exit from PSBLAS parallel environment</TITLE>
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<H2><A NAME="SECTION00085000000000000000">
psb_get_rank -- Get the MPI rank</A>
<H2><A NAME="SECTION00083000000000000000">
psb_exit -- Exit from PSBLAS parallel
environment</A>
</H2>
<P>
<PRE>
call psb_get_rank(rank, icontxt, id)
call psb_exit(icontxt)
call psb_exit(icontxt,close)
</PRE>
<P>
This subroutine returns the MPI rank of the PSBLAS process <IMG
WIDTH="18" HEIGHT="15" ALIGN="BOTTOM" BORDER="0"
SRC="img129.png"
ALT="$id$">
This subroutine exits from the PSBLAS parallel virtual machine.
<DL>
<DT><STRONG>Type:</STRONG></DT>
<DD>Asynchronous.
<DD>Synchronous.
</DD>
<DT><STRONG><B>On Entry </B></STRONG></DT>
<DD>
@@ -84,45 +83,69 @@ Intent: <B>in</B>.
<BR>
Specified as: an integer variable.
</DD>
<DT><STRONG>id</STRONG></DT>
<DD>Identifier of a process in the PSBLAS virtual parallel machine.
<DT><STRONG>close</STRONG></DT>
<DD>Whether to close all data structures related to the
virtual parallel machine, besides those associated with icontxt.
<BR>
Scope: <B>local</B>.
Scope: <B>global</B>.
<BR>
Type: <B>required</B>.
Type: <B>optional</B>.
<BR>
Intent: <B>in</B>.
<BR>
Specified as: an integer value. <!-- MATH
$0 \le id \le np-1$
-->
<IMG
WIDTH="113" HEIGHT="30" ALIGN="MIDDLE" BORDER="0"
SRC="img130.png"
ALT="$0 \le id \le np-1$"> </DD>
</DL>
<P>
<DL>
<DT><STRONG><B>On Return</B></STRONG></DT>
<DD>
Specified as: a logical variable, default value: true.
</DD>
<DT><STRONG>rank</STRONG></DT>
<DD>The MPI rank associated with the PSBLAS process <IMG
WIDTH="18" HEIGHT="15" ALIGN="BOTTOM" BORDER="0"
SRC="img129.png"
ALT="$id$">.
<BR>
Scope: <B>local</B>.
<BR>
Type: <B>required</B>.
<BR>
Intent: <B>out</B>.
<BR></DD>
</DL>
<P>
<BR><HR>
<FONT SIZE="+1"><B>Notes</B></FONT>
<OL>
<LI>This routine may be called even if a previous call to
<code>psb_info</code> has returned with <IMG
WIDTH="73" HEIGHT="29" ALIGN="MIDDLE" BORDER="0"
SRC="img128.png"
ALT="$iam=-1$">; indeed, it it is the only
routine that may be called with argument <code>icontxt</code> in this
situation.
</LI>
<LI>A call to this routine with <code>close=.true.</code> implies a call
to <code>MPI_Finalize</code>, after which no parallel routine may be called.
</LI>
<LI>If the user whishes to use multiple communication contexts in the
same program, or to enter and exit multiple times into the parallel
environment, this routine may be called to
selectively close the contexts with <code>close=.false.</code>, while on
the last call it should be called with <code>close=.true.</code> to
shutdown in a clean way the entire parallel environment.
</LI>
</OL>
<P>
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