You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
166 lines
6.9 KiB
HTML
166 lines
6.9 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
|
|
"http://www.w3.org/TR/html4/loose.dtd">
|
|
<html >
|
|
<head><title>psb_spall — Allocates a sparse matrix</title>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
|
<meta name="generator" content="TeX4ht (https://tug.org/tex4ht/)">
|
|
<meta name="originator" content="TeX4ht (https://tug.org/tex4ht/)">
|
|
<!-- html,3 -->
|
|
<meta name="src" content="userhtml.tex">
|
|
<link rel="stylesheet" type="text/css" href="userhtml.css">
|
|
</head><body
|
|
>
|
|
<!--l. 547--><div class="crosslinks"><p class="noindent">[<a
|
|
href="userhtmlsu40.html" >next</a>] [<a
|
|
href="userhtmlsu35.html" >prev</a>] [<a
|
|
href="userhtmlsu35.html#tailuserhtmlsu35.html" >prev-tail</a>] [<a
|
|
href="userhtmlsu33.html#tailuserhtmlsu36.html">tail</a>] [<a
|
|
href="userhtmlsu32.html#userhtmlsu39.html" >up</a>] </p></div>
|
|
<h4 class="subsectionHead"><span class="titlemark">6.7 </span> <a
|
|
id="x47-840006.7"></a>psb_spall — Allocates a sparse matrix</h4>
|
|
|
|
|
|
|
|
<pre class="verbatim" id="verbatim-40">
|
|
call psb_spall(a, desc_a, info [, nnz, dupl, bldmode])
|
|
</pre>
|
|
<!--l. 551--><p class="nopar" >
|
|
<!--l. 553--><p class="indent" >
|
|
<dl class="description"><dt class="description">
|
|
<span
|
|
class="cmbx-10">Type:</span> </dt><dd
|
|
class="description">Synchronous.
|
|
</dd><dt class="description">
|
|
<span
|
|
class="cmbx-10">On Entry</span> </dt><dd
|
|
class="description">
|
|
</dd><dt class="description">
|
|
<span
|
|
class="cmbx-10">desc</span><span
|
|
class="cmbx-10">_a</span> </dt><dd
|
|
class="description">the communication descriptor.<br
|
|
class="newline" />Scope:<span
|
|
class="cmbx-10">local</span>.<br
|
|
class="newline" />Type:<span
|
|
class="cmbx-10">required</span>.<br
|
|
class="newline" />Intent: <span
|
|
class="cmbx-10">in</span>.<br
|
|
class="newline" />Specified as: a structured data of type <a
|
|
href="userhtmlsu5.html#descdata"><span
|
|
class="cmtt-10">psb</span><span
|
|
class="cmtt-10">_desc</span><span
|
|
class="cmtt-10">_type</span></a>.
|
|
</dd><dt class="description">
|
|
<span
|
|
class="cmbx-10">nnz</span> </dt><dd
|
|
class="description">An estimate of the number of nonzeroes in the local part of the assembled
|
|
matrix.<br
|
|
class="newline" />Scope: <span
|
|
class="cmbx-10">global</span>.<br
|
|
class="newline" />Type: <span
|
|
class="cmbx-10">optional</span>.<br
|
|
class="newline" />Intent: <span
|
|
class="cmbx-10">in</span>.<br
|
|
class="newline" />Specified as: an integer value.
|
|
</dd><dt class="description">
|
|
<span
|
|
class="cmbx-10">dupl</span> </dt><dd
|
|
class="description">How to handle duplicate coefficients.<br
|
|
class="newline" />Scope: <span
|
|
class="cmbx-10">global</span>.<br
|
|
class="newline" />Type: <span
|
|
class="cmbx-10">optional</span>.<br
|
|
class="newline" />Intent: <span
|
|
class="cmbx-10">in</span>.<br
|
|
class="newline" />Specified as: integer, possible values: <span class="obeylines-h"><span class="verb"><span
|
|
class="cmtt-10">psb_dupl_ovwrt_</span></span></span>, <span class="obeylines-h"><span class="verb"><span
|
|
class="cmtt-10">psb_dupl_add_</span></span></span>,
|
|
<span class="obeylines-h"><span class="verb"><span
|
|
class="cmtt-10">psb_dupl_err_</span></span></span>.
|
|
</dd><dt class="description">
|
|
<span
|
|
class="cmbx-10">bldmode</span> </dt><dd
|
|
class="description">Whether to keep track of matrix entries that do not belong to the
|
|
current process.<br
|
|
class="newline" />Scope: <span
|
|
class="cmbx-10">global</span>.<br
|
|
class="newline" />Type: <span
|
|
class="cmbx-10">optional</span>.<br
|
|
class="newline" />Intent: <span
|
|
class="cmbx-10">in</span>.<br
|
|
class="newline" />Specified as:
|
|
an integer value <span class="obeylines-h"><span class="verb"><span
|
|
class="cmtt-10">psb_matbld_noremote_</span></span></span>, <span class="obeylines-h"><span class="verb"><span
|
|
class="cmtt-10">psb_matbld_remote_</span></span></span>. Default:
|
|
<span class="obeylines-h"><span class="verb"><span
|
|
class="cmtt-10">psb_matbld_noremote_</span></span></span>.</dd></dl>
|
|
<!--l. 582--><p class="indent" >
|
|
<dl class="description"><dt class="description">
|
|
<span
|
|
class="cmbx-10">On Return</span> </dt><dd
|
|
class="description">
|
|
|
|
|
|
|
|
</dd><dt class="description">
|
|
<span
|
|
class="cmbx-10">a</span> </dt><dd
|
|
class="description">the matrix to be allocated.<br
|
|
class="newline" />Scope:<span
|
|
class="cmbx-10">local</span><br
|
|
class="newline" />Type:<span
|
|
class="cmbx-10">required</span><br
|
|
class="newline" />Intent: <span
|
|
class="cmbx-10">out</span>.<br
|
|
class="newline" />Specified as: a structured data of type <a
|
|
href="userhtmlsu6.html#spdata"><span
|
|
class="cmtt-10">psb</span><span
|
|
class="cmtt-10">_Tspmat</span><span
|
|
class="cmtt-10">_type</span></a>.
|
|
</dd><dt class="description">
|
|
<span
|
|
class="cmbx-10">info</span> </dt><dd
|
|
class="description">Error code.<br
|
|
class="newline" />Scope: <span
|
|
class="cmbx-10">local </span><br
|
|
class="newline" />Type: <span
|
|
class="cmbx-10">required </span><br
|
|
class="newline" />Intent: <span
|
|
class="cmbx-10">out</span>.<br
|
|
class="newline" />An integer value; 0 means no error has been detected.</dd></dl>
|
|
<!--l. 595--><p class="noindent" ><span
|
|
class="cmbx-12">Notes</span>
|
|
<ol class="enumerate1" >
|
|
<li
|
|
class="enumerate" id="x47-84002x1">On exit from this routine the sparse matrix is in the build state.
|
|
</li>
|
|
<li
|
|
class="enumerate" id="x47-84004x2">The descriptor may be in either the build or assembled state.
|
|
</li>
|
|
<li
|
|
class="enumerate" id="x47-84006x3">Providing a good estimate for the number of nonzeroes <span
|
|
class="cmmi-10">nnz </span>in the
|
|
assembled matrix may substantially improve performance in the matrix
|
|
build phase, as it will reduce or eliminate the need for (potentially
|
|
multiple) data reallocations;
|
|
</li>
|
|
<li
|
|
class="enumerate" id="x47-84008x4">Using <span class="obeylines-h"><span class="verb"><span
|
|
class="cmtt-10">psb_matbld_remote_</span></span></span> is likely to cause a runtime overhead at
|
|
assembly time;</li></ol>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<!--l. 613--><div class="crosslinks"><p class="noindent">[<a
|
|
href="userhtmlsu40.html" >next</a>] [<a
|
|
href="userhtmlsu35.html" >prev</a>] [<a
|
|
href="userhtmlsu35.html#tailuserhtmlsu35.html" >prev-tail</a>] [<a
|
|
href="userhtmlsu36.html" >front</a>] [<a
|
|
href="userhtmlsu32.html#userhtmlsu39.html" >up</a>] </p></div>
|
|
<!--l. 613--><p class="indent" > <a
|
|
id="tailuserhtmlsu36.html"></a>
|
|
</body></html>
|