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130 lines
3.3 KiB
HTML
130 lines
3.3 KiB
HTML
17 years ago
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<!--Converted with LaTeX2HTML 2002-2-1 (1.71)
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original version by: Nikos Drakos, CBLU, University of Leeds
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* revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan
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* with significant contributions from:
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Jens Lippmann, Marek Rouchal, Martin Wilck and others -->
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<HTML>
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<HEAD>
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<TITLE>psb_init -- Initializes PSBLAS parallel environment</TITLE>
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<BR>
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<B> Next:</B> <A NAME="tex2html1079"
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HREF="node72.html">psb_info Return</A>
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<B> Up:</B> <A NAME="tex2html1075"
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HREF="node70.html">Parallel environment routines</A>
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<B> Previous:</B> <A NAME="tex2html1069"
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HREF="node70.html">Parallel environment routines</A>
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<B> <A NAME="tex2html1077"
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HREF="node1.html">Contents</A></B>
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<BR>
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<!--End of Navigation Panel-->
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<H2><A NAME="SECTION00081000000000000000">
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psb_init -- Initializes PSBLAS parallel environment</A>
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</H2>
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<P>
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<PRE>
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call psb_init(icontxt, np)
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</PRE>
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<P>
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This subroutine initializes the PSBLAS parallel environment, defining
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a virtual parallel machine.
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<DL>
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<DT><STRONG>Type:</STRONG></DT>
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<DD>Synchronous.
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</DD>
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<DT><STRONG><B>On Entry </B></STRONG></DT>
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<DD>
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</DD>
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<DT><STRONG>np</STRONG></DT>
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<DD>Number of processes in the PSBLAS virtual parallel machine.
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<BR>
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Scope: <B>global</B>.
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<BR>
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Type: <B>optional</B>.
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<BR>
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Intent: <B>in</B>.
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<BR>
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Specified as: an integer value. Default: use all available processes provided by the underlying
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parallel environment.
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</DD>
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</DL>
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<P>
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<DL>
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<DT><STRONG><B>On Return</B></STRONG></DT>
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<DD>
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</DD>
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<DT><STRONG>icontxt</STRONG></DT>
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<DD>the communication context identifying the virtual
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parallel machine.
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<BR>
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Scope: <B>global</B>.
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<BR>
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Type: <B>required</B>.
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<BR>
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Intent: <B>out</B>.
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<BR>
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Specified as: an integer variable.
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</DD>
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</DL>
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<P>
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<FONT SIZE="+1"><B>Notes</B></FONT>
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<OL>
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<LI>A call to this routine must precede any other PSBLAS call.
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</LI>
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<LI>It is an error to specify a value for <IMG
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WIDTH="22" HEIGHT="30" ALIGN="MIDDLE" BORDER="0"
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SRC="img117.png"
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ALT="$np$"> greater than the
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number of processes available in the underlying parallel execution
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environment.
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</LI>
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</OL>
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<P>
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<BR><HR>
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</BODY>
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</HTML>
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