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Changed guide to new style
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Cirdans-Home
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@@ -10,7 +10,7 @@
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<link rel="stylesheet" type="text/css" href="userhtml.css">
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</head><body
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>
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<!--l. 164--><div class="crosslinks"><p class="noindent">[<a
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<!--l. 162--><div class="crosslinks"><p class="noindent">[<a
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href="userhtmlsu30.html" >next</a>] [<a
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href="userhtmlsu26.html" >prev</a>] [<a
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href="userhtmlsu26.html#tailuserhtmlsu26.html" >prev-tail</a>] [<a
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@@ -18,12 +18,12 @@ href="userhtmlsu25.html#tailuserhtmlsu27.html">tail</a>] [<a
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href="userhtmlsu28.html#userhtmlse6.html" >up</a>] </p></div>
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<h4 class="subsectionHead"><span class="titlemark">5.2 </span> <a
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id="x37-740005.2"></a>psb_ovrl — Overlap Update</h4>
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<!--l. 166--><p class="noindent" >These subroutines applies an overlap operator to the input vector:
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<!--l. 164--><p class="noindent" >These subroutines applies an overlap operator to the input vector:
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<center class="par-math-display" >
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<img
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src="userhtml26x.png" alt="x ← Qx
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" class="par-math-display" ></center>
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<!--l. 168--><p class="nopar" > where:
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<!--l. 166--><p class="nopar" > where:
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<dl class="description"><dt class="description">
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<span
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class="cmmi-10">x</span> </dt><dd
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@@ -41,15 +41,15 @@ class="cmmi-7">T</span></sup>.</dd></dl>
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<!--l. 176--><p class="indent" > <a
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id="x37-7400118"></a><hr class="float"><div class="float"
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<!--l. 174--><p class="indent" > <a
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id="x37-74001r18"></a><hr class="float"><div class="float"
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>
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<div class="center"
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>
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<!--l. 177--><p class="noindent" >
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<!--l. 175--><p class="noindent" >
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<div class="tabular"> <table id="TBL-19" class="tabular"
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cellspacing="0" cellpadding="0"
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><colgroup id="TBL-19-1g"><col
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@@ -83,15 +83,13 @@ class="hline"><td><hr></td><td><hr></td></tr><tr
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class="td11"> </td></tr></table></div></div>
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<br /> <div class="caption"
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><span class="id">Table 18: </span><span
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class="content">Data types</span></div><!--tex4ht:label?: x37-7400118 -->
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class="content">Data types</span></div><!--tex4ht:label?: x37-74001r18 -->
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</div><hr class="endfloat" />
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</div>
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<!--l. 192-->
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<div class="lstlisting" id="listing-6"><span class="label"><a
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id="x37-74002r1"></a></span><span
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<!--l. 190--><p class="noindent" ><span class="lstinline"></span><span
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class="cmtt-10">call</span><span
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class="cmtt-10"> </span><span
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class="cmtt-10">psb_ovrl</span><span
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@@ -103,9 +101,8 @@ class="cmtt-10">desc_a</span><span
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class="cmtt-10">,</span><span
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class="cmtt-10"> </span><span
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class="cmtt-10">info</span><span
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class="cmtt-10">)</span><span
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class="cmtt-10"> </span><br /><span class="label"><a
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id="x37-74003r2"></a></span><span
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class="cmtt-10">)</span><br
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class="newline" /><span class="lstinline"></span><span
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class="cmtt-10">call</span><span
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class="cmtt-10"> </span><span
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class="cmtt-10">psb_ovrl</span><span
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@@ -128,8 +125,6 @@ class="cmtt-10">work</span><span
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class="cmtt-10">=</span><span
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class="cmtt-10">work</span><span
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class="cmtt-10">)</span>
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</div>
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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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@@ -156,7 +151,7 @@ class="cmtt-10">psb</span><span
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class="cmtt-10">_T</span><span
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class="cmtt-10">_vect</span><span
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class="cmtt-10">_type</span></a> containing numbers of type specified in Table <a
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href="#x37-7400118">18<!--tex4ht:ref: tab:f90ovrl --></a>.
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href="#x37-74001r18">18<!--tex4ht:ref: tab:f90ovrl --></a>.
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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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@@ -202,7 +197,7 @@ class="cmmi-10">P</span><sub><span
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class="cmmi-7">a</span></sub><span
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class="cmmi-10">P</span><sup><span
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class="cmmi-7">T</span></sup>;</dd></dl>
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<!--l. 219--><p class="noindent" >Scope: <span
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<!--l. 215--><p class="noindent" >Scope: <span
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class="cmbx-10">global </span><br
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class="newline" />Intent: <span
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class="cmbx-10">in</span>.<br
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@@ -226,13 +221,13 @@ class="newline" />Intent: <span
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class="cmbx-10">inout</span>.<br
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class="newline" />Specified as: a one dimensional array of the same type of <span
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class="cmmi-10">x</span>.
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</dd><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">x</span> </dt><dd
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@@ -246,7 +241,7 @@ class="newline" />Intent: <span
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class="cmbx-10">inout</span>.<br
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class="newline" />Specified as: an array of rank one or two containing numbers of type specified
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in Table <a
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href="#x37-7400118">18<!--tex4ht:ref: tab:f90ovrl --></a>.
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href="#x37-74001r18">18<!--tex4ht:ref: tab:f90ovrl --></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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@@ -258,15 +253,15 @@ 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.</dd></dl>
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<!--l. 246--><p class="noindent" ><span
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<!--l. 242--><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="x37-74005x1">If there is no overlap in the data distribution associated with the
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class="enumerate" id="x37-74003x1">If there is no overlap in the data distribution associated with the
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descriptor, no operations are performed;
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</li>
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<li
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class="enumerate" id="x37-74007x2">The operator <span
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class="enumerate" id="x37-74005x2">The operator <span
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class="cmmi-10">P</span><sup><span
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class="cmmi-7">T</span></sup> performs the reduction sum of overlap elements; it is a
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“prolongation” operator <span
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@@ -275,63 +270,63 @@ class="cmmi-7">T</span></sup> that replicates overlap elements, accounting
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for the physical replication of data;
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</li>
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<li
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class="enumerate" id="x37-74009x3">The operator <span
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class="enumerate" id="x37-74007x3">The operator <span
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class="cmmi-10">P</span><sub><span
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class="cmmi-7">a</span></sub> performs a scaling on the overlap elements by the
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amount of replication; thus, when combined with the reduction operator,
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it implements the average of replicated elements over all of their instances.</li></ol>
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<!--l. 265--><p class="indent" > <hr class="figure"><div class="figure"
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<!--l. 261--><p class="indent" > <hr class="figure"><div class="figure"
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>
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<a
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id="x37-740108"></a>
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id="x37-74008r4"></a>
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<div class="center"
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>
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<!--l. 266--><p class="noindent" >
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<!--l. 268--><p class="noindent" ><img
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<!--l. 262--><p class="noindent" >
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<!--l. 264--><p class="noindent" ><img
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src="try8x8_ov.png" alt="PIC"
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></div>
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<br /> <div class="caption"
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><span class="id">Figure 8: </span><span
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class="content">Sample discretization mesh.</span></div><!--tex4ht:label?: x37-740108 -->
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><span class="id">Figure 4: </span><span
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class="content">Sample discretization mesh.</span></div><!--tex4ht:label?: x37-74008r4 -->
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<!--l. 274--><p class="indent" > </div><hr class="endfigure">
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<!--l. 275--><p class="noindent" ><span
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<!--l. 270--><p class="indent" > </div><hr class="endfigure">
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<!--l. 271--><p class="noindent" ><span
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class="cmbx-12">Example of use </span>Consider the discretization mesh depicted in fig. <a
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href="#x37-740108">8<!--tex4ht:ref: fig:try8x8_ov --></a>, partitioned
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href="#x37-74008r4">4<!--tex4ht:ref: fig:try8x8_ov --></a>, partitioned
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among two processes as shown by the dashed lines, with an overlap of 1 extra layer
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with respect to the partition of fig. <a
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href="userhtmlsu26.html#x36-730047">7<!--tex4ht:ref: fig:try8x8 --></a>; the data distribution is such that
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href="userhtmlsu26.html#x36-73002r3">3<!--tex4ht:ref: fig:try8x8 --></a>; the data distribution is such that
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each process will own 40 entries in the index space, with an overlap of 16
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entries placed at local indices 25 through 40; the halo will run from local
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index 41 through local index 48.. If process 0 assigns an initial value of 1 to
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its entries in the <span
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class="cmmi-10">x </span>vector, and process 1 assigns a value of 2, then after a
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call to <span class="obeylines-h"><span class="verb"><span
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class="cmtt-10">psb_ovrl</span></span></span> with <span class="obeylines-h"><span class="verb"><span
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class="cmtt-10">psb_avg_</span></span></span> and a call to <span class="obeylines-h"><span class="verb"><span
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class="cmtt-10">psb_halo_</span></span></span> the contents of
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call to <span class="lstinline"></span><span
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class="cmtt-10">psb_ovrl</span> with <span class="lstinline"></span><span
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class="cmtt-10">psb_avg_</span> and a call to <span class="lstinline"></span><span
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class="cmtt-10">psb_halo_</span> the contents of
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the local vectors will be the following (showing a transition among the two
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subdomains)
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<div class="table">
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<!--l. 289--><p class="indent" > <hr class="float"><div class="float"
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<!--l. 285--><p class="indent" > <hr class="float"><div class="float"
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>
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<div class="center"
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>
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<!--l. 289--><p class="noindent" >
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<!--l. 285--><p class="noindent" >
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<div class="tabular"> <table id="TBL-20" class="tabular"
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cellspacing="0" cellpadding="0"
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><colgroup id="TBL-20-1g"><col
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@@ -1035,12 +1030,12 @@ class="td11"> </td></tr></table></div></div>
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<!--l. 355--><div class="crosslinks"><p class="noindent">[<a
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<!--l. 351--><div class="crosslinks"><p class="noindent">[<a
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href="userhtmlsu30.html" >next</a>] [<a
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href="userhtmlsu26.html" >prev</a>] [<a
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href="userhtmlsu26.html#tailuserhtmlsu26.html" >prev-tail</a>] [<a
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href="userhtmlsu27.html" >front</a>] [<a
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href="userhtmlsu28.html#userhtmlse6.html" >up</a>] </p></div>
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<!--l. 355--><p class="indent" > <a
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<!--l. 351--><p class="indent" > <a
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id="tailuserhtmlsu27.html"></a>
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</body></html>
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