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This commit is contained in:
Salvatore Filippone
+138
-88
@@ -7,8 +7,8 @@ original version by: Nikos Drakos, CBLU, University of Leeds
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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_spasb -- Sparse matrix assembly routine</TITLE>
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<META NAME="description" CONTENT="psb_spasb -- Sparse matrix assembly routine">
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<TITLE>psb_cdins -- Communication descriptor insert routine</TITLE>
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<META NAME="description" CONTENT="psb_cdins -- Communication descriptor insert routine">
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@@ -20,67 +20,116 @@ original version by: Nikos Drakos, CBLU, University of Leeds
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<BR>
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<B> Next:</B> <A NAME="tex2html1058"
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HREF="node68.html">psb_spfree Frees</A>
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<B> Up:</B> <A NAME="tex2html1054"
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HREF="node58.html">Data management routines</A>
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<B> Previous:</B> <A NAME="tex2html1048"
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HREF="node66.html">psb_spins Insert</A>
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<B> <A NAME="tex2html1056"
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<B> Next:</B> <A NAME="tex2html1079"
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HREF="node68.html">psb_cdasb Communication</A>
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<B> Up:</B> <A NAME="tex2html1075"
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HREF="node65.html">Data management routines</A>
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<B> Previous:</B> <A NAME="tex2html1069"
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HREF="node66.html">psb_cdall Allocates</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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<BR>
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<!--End of Navigation Panel-->
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<H2><A NAME="SECTION00079000000000000000">
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psb_spasb -- Sparse matrix assembly routine</A>
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<H2><A NAME="SECTION00072000000000000000">
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psb_cdins -- Communication descriptor insert
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routine</A>
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</H2>
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<P>
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<PRE>
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call psb_spasb(a, desc_a, info, afmt, upd, dupl, mold)
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call psb_cdins(nz, ia, ja, desc_a, info [,ila,jla])
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call psb_cdins(nz,ja,desc,info[,jla,mask,lidx])
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</PRE>
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<P>
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This subroutine examines the edges of the graph associated with the
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discretization mesh (and isomorphic to the sparsity pattern of a
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linear system coefficient matrix), storing them as necessary into the
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communication descriptor. In the first form the edges are specified as
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pairs of indices <IMG
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WIDTH="77" HEIGHT="32" ALIGN="MIDDLE" BORDER="0"
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SRC="img99.png"
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ALT="$ia(i),ja(i)$">; the starting index <IMG
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WIDTH="35" HEIGHT="32" ALIGN="MIDDLE" BORDER="0"
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SRC="img100.png"
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ALT="$ia(i)$"> should
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belong to the current process.
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In the second form only the remote indices <IMG
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WIDTH="38" HEIGHT="32" ALIGN="MIDDLE" BORDER="0"
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SRC="img101.png"
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ALT="$ja(i)$"> are specified.
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<P>
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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>Asynchronous.
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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>desc_a</STRONG></DT>
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<DD>the communication descriptor.
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<DT><STRONG>nz</STRONG></DT>
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<DD>the number of points being inserted.
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<BR>
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Scope:<B>local</B>.
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Scope: <B>local</B>.
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<BR>
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Type:<B>required</B>.
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Type: <B>required</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: a structured data of type descdata<TT>psb_desc_type</TT>.
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Specified as: an integer value.
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</DD>
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<DT><STRONG>afmt</STRONG></DT>
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<DD>the storage format for the sparse matrix.
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<DT><STRONG>ia</STRONG></DT>
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<DD>the indices of the starting vertex of the edges being inserted.
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<BR>
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Scope: <B>local</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>in</B>.
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<BR>
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Specified as: an integer array of length <IMG
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WIDTH="21" HEIGHT="13" ALIGN="BOTTOM" BORDER="0"
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SRC="img102.png"
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ALT="$nz$">.
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</DD>
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<DT><STRONG>ja</STRONG></DT>
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<DD>the indices of the end vertex of the edges being inserted.
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<BR>
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Scope: <B>local</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>in</B>.
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<BR>
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Specified as: an integer array of length <IMG
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WIDTH="21" HEIGHT="13" ALIGN="BOTTOM" BORDER="0"
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SRC="img102.png"
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ALT="$nz$">.
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</DD>
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<DT><STRONG>mask</STRONG></DT>
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<DD>Mask entries in <code>ja</code>, they are inserted only when the
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corresponding <code>mask</code> entries are <code>.true.</code>
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<BR>
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Scope: <B>local</B>.
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<BR>
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@@ -88,33 +137,13 @@ 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 array of characters. Defalt: 'CSR'.
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Specified as: a logical array of length <IMG
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WIDTH="21" HEIGHT="13" ALIGN="BOTTOM" BORDER="0"
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SRC="img102.png"
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ALT="$nz$">, default <code>.true.</code>.
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</DD>
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<DT><STRONG>upd</STRONG></DT>
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<DD>Provide for updates to the matrix coefficients.
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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: integer, possible values: <code>psb_upd_srch_</code>, <code>psb_upd_perm_</code>
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</DD>
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<DT><STRONG>dupl</STRONG></DT>
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<DD>How to handle duplicate coefficients.
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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: integer, possible values: <code>psb_dupl_ovwrt_</code>,
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<code>psb_dupl_add_</code>, <code>psb_dupl_err_</code>.
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</DD>
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<DT><STRONG>mold</STRONG></DT>
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<DD>The desired dynamic type for the internal matrix storage.
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<DT><STRONG>lidx</STRONG></DT>
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<DD>User defined local indices for <code>ja</code>.
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<BR>
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Scope: <B>local</B>.
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<BR>
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@@ -122,7 +151,10 @@ 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 object of a class derived from spbasedata<TT>psb_T_base_sparse_mat</TT>.
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Specified as: an integer array of length <IMG
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WIDTH="21" HEIGHT="13" ALIGN="BOTTOM" BORDER="0"
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SRC="img102.png"
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ALT="$nz$">.
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</DD>
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</DL>
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@@ -131,16 +163,16 @@ Specified as: an object of a class derived from spbasedata<TT>psb_T_base_sparse_
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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>a</STRONG></DT>
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<DD>the matrix to be assembled.
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<DT><STRONG>desc_a</STRONG></DT>
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<DD>the updated communication descriptor.
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<BR>
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Scope:<B>local</B>
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Scope:<B>local</B>.
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<BR>
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Type:<B>required</B>
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Type:<B>required</B>.
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<BR>
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Intent: <B>inout</B>.
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<BR>
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Specified as: a structured data of type spdata<TT>psb_Tspmat_type</TT>.
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Specified as: a structured data of type descdata<TT>psb_desc_type</TT>.
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</DD>
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<DT><STRONG>info</STRONG></DT>
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<DD>Error code.
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@@ -153,57 +185,75 @@ Intent: <B>out</B>.
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<BR>
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An integer value; 0 means no error has been detected.
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</DD>
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</DL>
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<DT><STRONG>ila</STRONG></DT>
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<DD>the local indices of the starting vertex of the edges being inserted.
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<BR>
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Scope: <B>local</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>out</B>.
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<BR>
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Specified as: an integer array of length <IMG
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WIDTH="21" HEIGHT="13" ALIGN="BOTTOM" BORDER="0"
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SRC="img102.png"
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ALT="$nz$">.
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</DD>
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<DT><STRONG>jla</STRONG></DT>
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<DD>the local indices of the end vertex of the edges being inserted.
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<BR>
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Scope: <B>local</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>out</B>.
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<BR>
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Specified as: an integer array of length <IMG
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WIDTH="21" HEIGHT="13" ALIGN="BOTTOM" BORDER="0"
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SRC="img102.png"
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ALT="$nz$">.
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<P>
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</DD>
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</DL>
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<FONT SIZE="+1"><B>Notes</B></FONT>
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<OL>
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<LI>On entry to this routine the descriptor must be in the
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assembled state, i.e. <code>psb_cdasb</code> must already have been called.
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<LI>This routine may only be called if the descriptor is in the
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build state;
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</LI>
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<LI>The sparse matrix may be in either the build or update state;
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<LI>This routine automatically ignores edges that do not
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insist on the current process, i.e. edges for which neither the starting
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nor the end vertex belong to the current process.
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</LI>
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<LI>Duplicate entries are detected and handled in both build and
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update state, with the exception of the error action that is only
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taken in the build state, i.e. on the first assembly;
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</LI>
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<LI>If the update choice is <code>psb_upd_perm_</code>, then subsequent
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calls to <code>psb_spins</code> to update the matrix must be arranged in
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such a way as to produce exactly the same sequence of coefficient
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values as encountered at the first assembly;
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</LI>
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<LI>The output storage format need not be the same on all
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processes;
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</LI>
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<LI>On exit from this routine the matrix is in the assembled state,
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and thus is suitable for the computational routines.
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<LI>The second form of this routine will be useful when dealing with
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user-specified index mappings; see also <A HREF="node7.html#sec:usermaps">2.3.1</A>.
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</LI>
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</OL>
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<P>
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<HR>
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HREF="node68.html">psb_cdasb Communication</A>
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HREF="node65.html">Data management routines</A>
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HREF="node66.html">psb_cdall Allocates</A>
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<B> <A NAME="tex2html1077"
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HREF="node1.html">Contents</A></B>
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