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207 lines
8.5 KiB
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207 lines
8.5 KiB
HTML
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<head><title>psb_cdins — Communication descriptor insert routine</title>
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<h4 class="subsectionHead"><span class="titlemark">6.2 </span> <a
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id="x42-790006.2"></a>psb_cdins — Communication descriptor insert routine</h4>
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<div class="verbatim" id="verbatim-58">
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call psb_cdins(nz, ia, ja, desc_a, info [,ila,jla])
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 <br />call psb_cdins(nz,ja,desc,info[,jla,mask,lidx])
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</div>
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<!--l. 204--><p class="nopar" >
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<!--l. 206--><p class="indent" > 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 linear system
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coefficient matrix), storing them as necessary into the communication descriptor. In
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the first form the edges are specified as pairs of indices <span
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class="cmmi-10">ia</span>(<span
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class="cmmi-10">i</span>)<span
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class="cmmi-10">,ja</span>(<span
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class="cmmi-10">i</span>); the starting index
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<span
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class="cmmi-10">ia</span>(<span
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class="cmmi-10">i</span>) should belong to the current process. In the second form only the remote indices
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<span
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class="cmmi-10">ja</span>(<span
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class="cmmi-10">i</span>) are specified.
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<!--l. 214--><p class="indent" >
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<dl class="description"><dt class="description">
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<span
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class="cmbx-10">Type:</span> </dt><dd
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class="description">Asynchronous.
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</dd><dt class="description">
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<span
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class="cmbx-10">On Entry</span> </dt><dd
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class="description">
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</dd><dt class="description">
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<span
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class="cmbx-10">nz</span> </dt><dd
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class="description">the number of points being inserted.<br
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class="newline" />Scope: <span
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class="cmbx-10">local</span>.<br
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class="newline" />Type: <span
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class="cmbx-10">required</span>.<br
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class="newline" />Intent: <span
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class="cmbx-10">in</span>.<br
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class="newline" />Specified as: an integer value.
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</dd><dt class="description">
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<span
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class="cmbx-10">ia</span> </dt><dd
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class="description">the indices of the starting vertex of the edges being inserted.<br
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class="newline" />Scope: <span
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class="cmbx-10">local</span>.<br
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class="newline" />Type: <span
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class="cmbx-10">required</span>.<br
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class="newline" />Intent: <span
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class="cmbx-10">in</span>.<br
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class="newline" />Specified as: an integer array of length <span
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class="cmmi-10">nz</span>.
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</dd><dt class="description">
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<span
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class="cmbx-10">ja</span> </dt><dd
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class="description">the indices of the end vertex of the edges being inserted.<br
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class="newline" />Scope: <span
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class="cmbx-10">local</span>.<br
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class="newline" />Type: <span
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class="cmbx-10">required</span>.<br
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class="newline" />Intent: <span
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class="cmbx-10">in</span>.<br
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class="newline" />Specified as: an integer array of length <span
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class="cmmi-10">nz</span>.
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</dd><dt class="description">
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<span
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class="cmbx-10">mask</span> </dt><dd
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class="description">Mask entries in <span class="obeylines-h"><span class="verb"><span
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class="cmtt-10">ja</span></span></span>, they are inserted only when the corresponding <span class="obeylines-h"><span class="verb"><span
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class="cmtt-10">mask</span></span></span>
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entries are <span class="obeylines-h"><span class="verb"><span
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class="cmtt-10">.true.</span></span></span><br
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class="newline" />Scope: <span
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class="cmbx-10">local</span>.<br
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class="newline" />Type: <span
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class="cmbx-10">optional</span>.<br
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class="newline" />Intent: <span
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class="cmbx-10">in</span>.<br
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class="newline" />Specified as: a logical array of length <span
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class="cmmi-10">nz</span>, default <span class="obeylines-h"><span class="verb"><span
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class="cmtt-10">.true.</span></span></span>.
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</dd><dt class="description">
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<span
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class="cmbx-10">lidx</span> </dt><dd
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class="description">User defined local indices for <span class="obeylines-h"><span class="verb"><span
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class="cmtt-10">ja</span></span></span>.<br
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class="newline" />Scope: <span
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class="cmbx-10">local</span>.<br
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class="newline" />Type: <span
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class="cmbx-10">optional</span>.<br
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class="newline" />Intent: <span
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class="cmbx-10">in</span>.<br
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class="newline" />Specified as: an integer array of length <span
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class="cmmi-10">nz</span>.</dd></dl>
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<!--l. 253--><p class="indent" >
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<dl class="description"><dt class="description">
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<span
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class="cmbx-10">On Return</span> </dt><dd
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class="description">
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</dd><dt class="description">
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<span
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class="cmbx-10">desc</span><span
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class="cmbx-10">_a</span> </dt><dd
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class="description">the updated communication descriptor.<br
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class="newline" />Scope:<span
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class="cmbx-10">local</span>.<br
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class="newline" />Type:<span
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class="cmbx-10">required</span>.<br
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class="newline" />Intent: <span
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class="cmbx-10">inout</span>.<br
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class="newline" />Specified as: a structured data of type <a
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href="userhtmlsu5.html#descdata"><span
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class="cmtt-10">psb</span><span
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class="cmtt-10">_desc</span><span
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class="cmtt-10">_type</span></a>.
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</dd><dt class="description">
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<span
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class="cmbx-10">info</span> </dt><dd
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class="description">Error code.<br
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class="newline" />Scope: <span
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class="cmbx-10">local </span><br
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class="newline" />Type: <span
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class="cmbx-10">required </span><br
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class="newline" />Intent: <span
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class="cmbx-10">out</span>.<br
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class="newline" />An integer value; 0 means no error has been detected.
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</dd><dt class="description">
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<span
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class="cmbx-10">ila</span> </dt><dd
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class="description">the local indices of the starting vertex of the edges being inserted.<br
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class="newline" />Scope: <span
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class="cmbx-10">local</span>.<br
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class="newline" />Type: <span
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class="cmbx-10">optional</span>.<br
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class="newline" />Intent: <span
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class="cmbx-10">out</span>.<br
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class="newline" />Specified as: an integer array of length <span
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class="cmmi-10">nz</span>.
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</dd><dt class="description">
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<span
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class="cmbx-10">jla</span> </dt><dd
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class="description">the local indices of the end vertex of the edges being inserted.<br
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class="newline" />Scope: <span
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class="cmbx-10">local</span>.<br
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class="newline" />Type: <span
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class="cmbx-10">optional</span>.<br
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class="newline" />Intent: <span
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class="cmbx-10">out</span>.<br
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class="newline" />Specified as: an integer array of length <span
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class="cmmi-10">nz</span>.
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</dd></dl>
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<!--l. 277--><p class="noindent" ><span
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class="cmbx-12">Notes</span>
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<ol class="enumerate1" >
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<li
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class="enumerate" id="x42-79002x1">This routine may only be called if the descriptor is in the build state;
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</li>
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<li
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class="enumerate" id="x42-79004x2">This routine automatically ignores edges that do not insist on the current
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process, i.e. edges for which neither the starting nor the end vertex belong
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to the current process.
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</li>
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<li
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class="enumerate" id="x42-79006x3">The second form of this routine will be useful when dealing with
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user-specified index mappings; see also <a
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href="userhtmlsu3.html#x9-70002.3.1">2.3.1<!--tex4ht:ref: sec:usermaps --></a>.</li></ol>
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<!--l. 293--><div class="crosslinks"><p class="noindent">[<a
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href="userhtmlsu35.html" >next</a>] [<a
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href="userhtmlsu30.html" >prev</a>] [<a
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href="userhtmlsu30.html#tailuserhtmlsu30.html" >prev-tail</a>] [<a
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href="userhtmlsu31.html" >front</a>] [<a
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href="userhtmlsu32.html#userhtmlsu34.html" >up</a>] </p></div>
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