fdurastante/psblas3
1
0
Fork 0
mirror of https://github.com/sfilippone/psblas3.git synced 2026-10-14 18:09:05 +00:00
Code Issues Packages Projects Releases Wiki Activity

psblas3:

Browse Source 
Documentation changes. We have barely begun.....
This commit is contained in:
Salvatore Filippone
2011-12-16 16:45:25 +00:00
parent c730f15b58
commit 844a942947
243 changed files with 14860 additions and 15182 deletions
Download Patch File Download Diff File Expand all files Collapse all files
docs/html/node73.html
+136 -63
View File
@@ -7,8 +7,8 @@ original version by: Nikos Drakos, CBLU, University of Leeds
Jens Lippmann, Marek Rouchal, Martin Wilck and others -->
<HTML>
<HEAD>
<TITLE>Parallel environment routines</TITLE>
<META NAME="description" CONTENT="Parallel environment routines">
<TITLE>psb_init -- Initializes PSBLAS parallel environment</TITLE>
<META NAME="description" CONTENT="psb_init -- Initializes PSBLAS parallel environment">
<META NAME="keywords" CONTENT="userhtml">
<META NAME="resource-type" CONTENT="document">
<META NAME="distribution" CONTENT="global">
@@ -18,88 +18,161 @@ original version by: Nikos Drakos, CBLU, University of Leeds
<LINK REL="STYLESHEET" HREF="userhtml.css">
<LINK REL="next" HREF="node90.html">
<LINK REL="previous" HREF="node45.html">
<LINK REL="up" HREF="userhtml.html">
<LINK REL="next" HREF="node74.html">
<LINK REL="previous" HREF="node72.html">
<LINK REL="up" HREF="node72.html">
<LINK REL="next" HREF="node74.html">
</HEAD>
<BODY >
<!--Navigation Panel-->
<A NAME="tex2html1093"
<A NAME="tex2html1107"
HREF="node74.html">
<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.png"></A>
<A NAME="tex2html1089"
HREF="userhtml.html">
<A NAME="tex2html1103"
HREF="node72.html">
<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.png"></A>
<A NAME="tex2html1083"
<A NAME="tex2html1097"
HREF="node72.html">
<IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.png"></A>
<A NAME="tex2html1091"
<A NAME="tex2html1105"
HREF="node1.html">
<IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A>
<BR>
<B> Next:</B> <A NAME="tex2html1094"
HREF="node74.html">psb_init Initializes</A>
<B> Up:</B> <A NAME="tex2html1090"
HREF="userhtml.html">userhtml</A>
<B> Previous:</B> <A NAME="tex2html1084"
HREF="node72.html">Sorting utilities</A>
&nbsp; <B> <A NAME="tex2html1092"
<B> Next:</B> <A NAME="tex2html1108"
HREF="node74.html">psb_info Return</A>
<B> Up:</B> <A NAME="tex2html1104"
HREF="node72.html">Parallel environment routines</A>
<B> Previous:</B> <A NAME="tex2html1098"
HREF="node72.html">Parallel environment routines</A>
&nbsp; <B> <A NAME="tex2html1106"
HREF="node1.html">Contents</A></B>
<BR>
<BR>
<!--End of Navigation Panel-->
<H1><A NAME="SECTION00080000000000000000"></A>
<A NAME="sec:parenv"></A>
<BR>
Parallel environment routines
</H1>
<H2><A NAME="SECTION00081000000000000000">
psb_init -- Initializes PSBLAS parallel environment</A>
</H2>
<P>
<BR><HR>
<!--Table of Child-Links-->
<A NAME="CHILD_LINKS"><STRONG>Subsections</STRONG></A>
<PRE>
call psb_init(icontxt, np, basectxt, ids)
</PRE>
<UL>
<LI><A NAME="tex2html1095"
HREF="node74.html">psb_init -- Initializes PSBLAS parallel environment</A>
<LI><A NAME="tex2html1096"
HREF="node75.html">psb_info -- Return information about PSBLAS parallel
environment</A>
<LI><A NAME="tex2html1097"
HREF="node76.html">psb_exit -- Exit from PSBLAS parallel environment</A>
<LI><A NAME="tex2html1098"
HREF="node77.html">psb_get_mpicomm -- Get the MPI communicator</A>
<LI><A NAME="tex2html1099"
HREF="node78.html">psb_get_rank -- Get the MPI rank</A>
<LI><A NAME="tex2html1100"
HREF="node79.html">psb_wtime -- Wall clock timing</A>
<LI><A NAME="tex2html1101"
HREF="node80.html">psb_barrier -- Sinchronization point parallel
environment</A>
<LI><A NAME="tex2html1102"
HREF="node81.html">psb_abort -- Abort a computation</A>
<LI><A NAME="tex2html1103"
HREF="node82.html">psb_bcast -- Broadcast data</A>
<LI><A NAME="tex2html1104"
HREF="node83.html">psb_sum -- Global sum</A>
<LI><A NAME="tex2html1105"
HREF="node84.html">psb_max -- Global maximum</A>
<LI><A NAME="tex2html1106"
HREF="node85.html">psb_min -- Global minimum</A>
<LI><A NAME="tex2html1107"
HREF="node86.html">psb_amx -- Global maximum absolute value</A>
<LI><A NAME="tex2html1108"
HREF="node87.html">psb_amn -- Global minimum absolute value</A>
<LI><A NAME="tex2html1109"
HREF="node88.html">psb_snd -- Send data</A>
<LI><A NAME="tex2html1110"
HREF="node89.html">psb_rcv -- Receive data</A>
</UL>
<!--End of Table of Child-Links-->
<BR><HR>
<P>
This subroutine initializes the PSBLAS parallel environment, defining
a virtual parallel machine.
<DL>
<DT><STRONG>Type:</STRONG></DT>
<DD>Synchronous.
</DD>
<DT><STRONG><B>On Entry </B></STRONG></DT>
<DD>
</DD>
<DT><STRONG>np</STRONG></DT>
<DD>Number of processes in the PSBLAS virtual parallel machine.
<BR>
Scope: <B>global</B>.
<BR>
Type: <B>optional</B>.
<BR>
Intent: <B>in</B>.
<BR>
Specified as: an integer value. Default: use all available processes.
</DD>
<DT><STRONG>basectxt</STRONG></DT>
<DD>the initial communication context. The new context
will be defined from the processes participating in the initial one.
<BR>
Scope: <B>global</B>.
<BR>
Type: <B>optional</B>.
<BR>
Intent: <B>in</B>.
<BR>
Specified as: an integer value. Default: use MPI_COMM_WORLD.
</DD>
<DT><STRONG>ids</STRONG></DT>
<DD>Identities of the processes to use for the new context; the
argument is ignored when <code>np</code> is not specified. This allows the
processes in the new environment to be in an order different from the
original one.
<BR>
Scope: <B>global</B>.
<BR>
Type: <B>optional</B>.
<BR>
Intent: <B>in</B>.
<BR>
Specified as: an integer array. Default: use the indices <IMG
WIDTH="94" HEIGHT="32" ALIGN="MIDDLE" BORDER="0"
SRC="img94.png"
ALT="$(0\dots np-1)$">.
</DD>
</DL>
<P>
<DL>
<DT><STRONG><B>On Return</B></STRONG></DT>
<DD>
</DD>
<DT><STRONG>icontxt</STRONG></DT>
<DD>the communication context identifying the virtual
parallel machine. Note that this is always a duplicate of
<code>basectxt</code>, so that library communications are completely
separated from other communication operations.
<BR>
Scope: <B>global</B>.
<BR>
Type: <B>required</B>.
<BR>
Intent: <B>out</B>.
<BR>
Specified as: an integer variable.
</DD>
</DL>
<P>
<FONT SIZE="+1"><B>Notes</B></FONT>
<OL>
<LI>A call to this routine must precede any other PSBLAS call.
</LI>
<LI>It is an error to specify a value for <IMG
WIDTH="22" HEIGHT="30" ALIGN="MIDDLE" BORDER="0"
SRC="img122.png"
ALT="$np$"> greater than the
number of processes available in the underlying base parallel
environment.
</LI>
</OL>
<P>
<HR>
<!--Navigation Panel-->
<A NAME="tex2html1107"
HREF="node74.html">
<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.png"></A>
<A NAME="tex2html1103"
HREF="node72.html">
<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.png"></A>
<A NAME="tex2html1097"
HREF="node72.html">
<IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.png"></A>
<A NAME="tex2html1105"
HREF="node1.html">
<IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A>
<BR>
<B> Next:</B> <A NAME="tex2html1108"
HREF="node74.html">psb_info Return</A>
<B> Up:</B> <A NAME="tex2html1104"
HREF="node72.html">Parallel environment routines</A>
<B> Previous:</B> <A NAME="tex2html1098"
HREF="node72.html">Parallel environment routines</A>
&nbsp; <B> <A NAME="tex2html1106"
HREF="node1.html">Contents</A></B>
<!--End of Navigation Panel-->
</BODY>
</HTML>