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<title>SuperLU: SRC/ilu_dpanel_dfs.c File Reference</title>
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<h1>SRC/ilu_dpanel_dfs.c File Reference</h1>Peforms a symbolic factorization on a panel of symbols and record the entries with maximum absolute value in each column. <a href="#_details">More...</a>
<p>
<code>#include "<a class="el" href="slu__ddefs_8h-source.html">slu_ddefs.h</a>"</code><br>
<table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="ilu__dpanel__dfs_8c.html#0a3d016444b041668956824248d22439">ilu_dpanel_dfs</a> (const int m, const int w, const int jcol, <a class="el" href="structSuperMatrix.html">SuperMatrix</a> *<a class="el" href="ilu__zdrop__row_8c.html#c900805a486cbb8489e3c176ed6e0d8e">A</a>, int *perm_r, int *nseg, double *dense, double *amax, int *panel_lsub, int *segrep, int *repfnz, int *marker, int *parent, int *xplore, <a class="el" href="structGlobalLU__t.html">GlobalLU_t</a> *Glu)</td></tr>
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<hr><a name="_details"></a><h2>Detailed Description</h2>
<pre>
-- SuperLU routine (version 4.0) --
Lawrence Berkeley National Laboratory
June 30, 2009
</pre> <hr><h2>Function Documentation</h2>
<a class="anchor" name="0a3d016444b041668956824248d22439"></a><!-- doxytag: member="ilu_dpanel_dfs.c::ilu_dpanel_dfs" ref="0a3d016444b041668956824248d22439" args="(const int m, const int w, const int jcol, SuperMatrix *A, int *perm_r, int *nseg, double *dense, double *amax, int *panel_lsub, int *segrep, int *repfnz, int *marker, int *parent, int *xplore, GlobalLU_t *Glu)" -->
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<td class="memname">void ilu_dpanel_dfs </td>
<td>(</td>
<td class="paramtype">const int </td>
<td class="paramname"> <em>m</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const int </td>
<td class="paramname"> <em>w</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const int </td>
<td class="paramname"> <em>jcol</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="structSuperMatrix.html">SuperMatrix</a> * </td>
<td class="paramname"> <em>A</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>perm_r</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>nseg</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">double * </td>
<td class="paramname"> <em>dense</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">double * </td>
<td class="paramname"> <em>amax</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>panel_lsub</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>segrep</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>repfnz</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>marker</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>parent</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>xplore</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="structGlobalLU__t.html">GlobalLU_t</a> * </td>
<td class="paramname"> <em>Glu</em></td><td> </td>
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<td>)</td>
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<p>
<pre>
Purpose
=======</pre><p>
<pre> Performs a symbolic factorization on a panel of columns [jcol, jcol+w).</pre><p>
<pre> A supernode representative is the last column of a supernode.
The nonzeros in U[*,j] are segments that end at supernodal
representatives.</pre><p>
<pre> The routine returns one list of the supernodal representatives
in topological order of the dfs that generates them. This list is
a superset of the topological order of each individual column within
the panel.
The location of the first nonzero in each supernodal segment
(supernodal entry location) is also returned. Each column has a
separate list for this purpose.</pre><p>
<pre> Two marker arrays are used for dfs:
marker[i] == jj, if i was visited during dfs of current column jj;
marker1[i] >= jcol, if i was visited by earlier columns in this panel;</pre><p>
<pre> marker: A-row --> A-row/col (0/1)
repfnz: SuperA-col --> PA-row
parent: SuperA-col --> SuperA-col
xplore: SuperA-col --> index to L-structure
</pre>
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