<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <!--Converted with LaTeX2HTML 2008 (1.71) original version by: Nikos Drakos, CBLU, University of Leeds * revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan * with significant contributions from: Jens Lippmann, Marek Rouchal, Martin Wilck and others --> <HTML> <HEAD> <TITLE>psb_scatter -- Scatter Global Dense Matrix</TITLE> <META NAME="description" CONTENT="psb_scatter -- Scatter Global Dense Matrix"> <META NAME="keywords" CONTENT="userhtml"> <META NAME="resource-type" CONTENT="document"> <META NAME="distribution" CONTENT="global"> <META NAME="Generator" CONTENT="LaTeX2HTML v2008"> <META HTTP-EQUIV="Content-Style-Type" CONTENT="text/css"> <LINK REL="STYLESHEET" HREF="userhtml.css"> <LINK REL="previous" HREF="node42.html"> <LINK REL="up" HREF="node39.html"> <LINK REL="next" HREF="node44.html"> </HEAD> <BODY > <!--Navigation Panel--> <A NAME="tex2html706" HREF="node44.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.png"></A> <A NAME="tex2html702" HREF="node39.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.png"></A> <A NAME="tex2html698" HREF="node42.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.png"></A> <A NAME="tex2html704" HREF="node1.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A> <BR> <B> Next:</B> <A NAME="tex2html707" HREF="node44.html">Data management routines</A> <B> Up:</B> <A NAME="tex2html703" HREF="node39.html">Communication routines</A> <B> Previous:</B> <A NAME="tex2html699" HREF="node42.html">psb_gather Gather</A> <B> <A NAME="tex2html705" HREF="node1.html">Contents</A></B> <BR> <BR> <!--End of Navigation Panel--> <H2><A NAME="SECTION00064000000000000000"> psb_scatter -- Scatter Global Dense Matrix</A> </H2> <P> These subroutines scatters the portions of global dense matrix owned by a process to all the processes in the processes grid. <P> <BR><P></P> <DIV ALIGN="CENTER"> <!-- MATH \begin{displaymath} loc\_x_i \leftarrow scatter(glob\_x) \end{displaymath} --> <IMG WIDTH="168" HEIGHT="28" BORDER="0" SRC="img84.png" ALT="\begin{displaymath}loc\_x_i \leftarrow scatter(glob\_x) \end{displaymath}"> </DIV> <BR CLEAR="ALL"> <P></P> where: <DL> <DT><STRONG><IMG WIDTH="47" HEIGHT="30" ALIGN="MIDDLE" BORDER="0" SRC="img76.png" ALT="$glob\_x$"></STRONG></DT> <DD>is the global matrix <!-- MATH $glob\_x_{1:m,1:n}$ --> <IMG WIDTH="90" HEIGHT="30" ALIGN="MIDDLE" BORDER="0" SRC="img77.png" ALT="$glob\_x_{1:m,1:n}$"> </DD> <DT><STRONG><IMG WIDTH="44" HEIGHT="30" ALIGN="MIDDLE" BORDER="0" SRC="img78.png" ALT="$loc\_x_i$"></STRONG></DT> <DD>is the local portion of global dense matrix on process <IMG WIDTH="9" HEIGHT="17" ALIGN="BOTTOM" BORDER="0" SRC="img4.png" ALT="$i$">. </DD> <DT><STRONG><IMG WIDTH="53" HEIGHT="14" ALIGN="BOTTOM" BORDER="0" SRC="img85.png" ALT="$scatter$"></STRONG></DT> <DD>is the scatter function. </DD> </DL> <P> <BR><P></P> <DIV ALIGN="CENTER"><A NAME="2692"></A> <TABLE> <CAPTION><STRONG>Table 16:</STRONG> Data types</CAPTION> <TR><TD> <DIV ALIGN="CENTER"> <TABLE CELLPADDING=3 BORDER="1" ALIGN="CENTER"> <TR><TD ALIGN="LEFT"><IMG WIDTH="34" HEIGHT="30" ALIGN="MIDDLE" BORDER="0" SRC="img80.png" ALT="$x_i, y$"></TD> <TD ALIGN="LEFT"><B>Subroutine</B></TD> </TR> <TR><TD ALIGN="LEFT">Integer</TD> <TD ALIGN="LEFT">psb_scatter</TD> </TR> <TR><TD ALIGN="LEFT">Short Precision Real</TD> <TD ALIGN="LEFT">psb_scatter</TD> </TR> <TR><TD ALIGN="LEFT">Long Precision Real</TD> <TD ALIGN="LEFT">psb_scatter</TD> </TR> <TR><TD ALIGN="LEFT">Short Precision Complex</TD> <TD ALIGN="LEFT">psb_scatter</TD> </TR> <TR><TD ALIGN="LEFT">Long Precision Complex</TD> <TD ALIGN="LEFT">psb_scatter</TD> </TR> </TABLE> </DIV> </TD></TR> </TABLE> </DIV><P></P> <BR> <P> <PRE> call psb_scatter(glob_x, loc_x, desc_a, info, root) call psb_scatter(glob_x, loc_x, desc_a, info, root) </PRE> <P> <DL> <DT><STRONG>Type:</STRONG></DT> <DD>Synchronous. </DD> <DT><STRONG><B>On Entry</B></STRONG></DT> <DD> </DD> <DT><STRONG>glob_x</STRONG></DT> <DD>The array that must be scattered into local pieces. <BR> Scope: <B>global</B> <BR> Type: <B>required</B> <BR> Intent: <B>in</B>. <BR> Specified as: a rank one or two array. </DD> <DT><STRONG>desc_a</STRONG></DT> <DD>contains data structures for communications. <BR> Scope: <B>local</B> <BR> Type: <B>required</B> <BR> Intent: <B>in</B>. <BR> Specified as: a structured data of type descdata<TT>psb_desc_type</TT>. </DD> <DT><STRONG>root</STRONG></DT> <DD>The process that holds the global copy. If <IMG WIDTH="74" HEIGHT="30" ALIGN="MIDDLE" BORDER="0" SRC="img81.png" ALT="$root=-1$"> all the processes have a copy of the global vector. <BR> Scope: <B>global</B> <BR> Type: <B>optional</B> <BR> Intent: <B>in</B>. <BR> Specified as: an integer variable <!-- MATH $-1\le root\le np-1$ --> <IMG WIDTH="141" HEIGHT="30" ALIGN="MIDDLE" BORDER="0" SRC="img82.png" ALT="$-1\le root\le np-1$">, default <IMG WIDTH="24" HEIGHT="30" ALIGN="MIDDLE" BORDER="0" SRC="img83.png" ALT="$-1$">. </DD> <DT><STRONG><B>On Return</B></STRONG></DT> <DD> </DD> <DT><STRONG>loc_x</STRONG></DT> <DD>the local portion of global dense matrix <IMG WIDTH="47" HEIGHT="30" ALIGN="MIDDLE" BORDER="0" SRC="img76.png" ALT="$glob\_x$">. <BR> Scope: <B>local</B> <BR> Type: <B>required</B> <BR> Intent: <B>out</B>. <BR> Specified as: a rank one or two array containing numbers of the type indicated in Table <A HREF="#tab:scatter">16</A>. </DD> <DT><STRONG>info</STRONG></DT> <DD>Error code. <BR> Scope: <B>local</B> <BR> Type: <B>required</B> <BR> Intent: <B>out</B>. <BR> An integer value; 0 means no error has been detected. </DD> </DL> <P> <HR> <!--Navigation Panel--> <A NAME="tex2html706" HREF="node44.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.png"></A> <A NAME="tex2html702" HREF="node39.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.png"></A> <A NAME="tex2html698" HREF="node42.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.png"></A> <A NAME="tex2html704" HREF="node1.html"> <IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.png"></A> <BR> <B> Next:</B> <A NAME="tex2html707" HREF="node44.html">Data management routines</A> <B> Up:</B> <A NAME="tex2html703" HREF="node39.html">Communication routines</A> <B> Previous:</B> <A NAME="tex2html699" HREF="node42.html">psb_gather Gather</A> <B> <A NAME="tex2html705" HREF="node1.html">Contents</A></B> <!--End of Navigation Panel--> </BODY> </HTML>