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<head><title>psb_scatter — Scatter Global Dense Matrix</title>
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</head><body
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<!--l. 451--><div class="crosslinks"><p class="noindent">[<a
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href="userhtmlsu28.html" >prev</a>] [<a
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<h4 class="subsectionHead"><span class="titlemark">5.4 </span> <a
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id="x39-760005.4"></a>psb_scatter — Scatter Global Dense Matrix</h4>
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<!--l. 453--><p class="noindent" >These subroutines scatters the portions of global dense matrix owned by a process to
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all the processes in the processes grid.
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<center class="par-math-display" >
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<img
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src="userhtml28x.png" alt="loc-xi ← scatter(glob-x)
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" class="par-math-display" ></center>
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<!--l. 456--><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">glob</span>_<span
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class="cmmi-10">x</span> </dt><dd
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class="description">is the global matrix <span
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class="cmmi-10">glob</span>_<span
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class="cmmi-10">x</span><sub><span
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class="cmr-7">1:</span><span
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class="cmmi-7">m,</span><span
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class="cmr-7">1:</span><span
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class="cmmi-7">n</span></sub>
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</dd><dt class="description">
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<span
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class="cmmi-10">loc</span>_<span
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class="cmmi-10">x</span><sub><span
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class="cmmi-7">i</span></sub> </dt><dd
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class="description">is the local portion of global dense matrix on process <span
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class="cmmi-10">i</span>.
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</dd><dt class="description">
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<span
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class="cmmi-10">scatter</span> </dt><dd
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class="description">is the scatter function.</dd></dl>
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<div class="table">
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<!--l. 465--><p class="indent" > <a
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id="x39-76001r20"></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. 466--><p class="noindent" >
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<div class="tabular"> <table id="TBL-22" class="tabular"
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cellspacing="0" cellpadding="0"
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><colgroup id="TBL-22-1g"><col
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id="TBL-22-1"><col
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id="TBL-22-2"></colgroup><tr
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class="hline"><td><hr></td><td><hr></td></tr><tr
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style="vertical-align:baseline;" id="TBL-22-1-"><td style="white-space:nowrap; text-align:left;" id="TBL-22-1-1"
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class="td11"><span
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class="cmmi-10">x</span><sub><span
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class="cmmi-7">i</span></sub><span
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class="cmmi-10">,y </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-22-1-2"
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class="td11"><span
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class="cmbx-10">Subroutine</span></td>
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</tr><tr
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class="hline"><td><hr></td><td><hr></td></tr><tr
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style="vertical-align:baseline;" id="TBL-22-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-22-2-1"
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class="td11">Integer </td><td style="white-space:nowrap; text-align:left;" id="TBL-22-2-2"
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class="td11">psb_scatter </td>
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</tr><tr
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style="vertical-align:baseline;" id="TBL-22-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-22-3-1"
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class="td11">Short Precision Real </td><td style="white-space:nowrap; text-align:left;" id="TBL-22-3-2"
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class="td11">psb_scatter </td>
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</tr><tr
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style="vertical-align:baseline;" id="TBL-22-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-22-4-1"
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class="td11">Long Precision Real </td><td style="white-space:nowrap; text-align:left;" id="TBL-22-4-2"
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class="td11">psb_scatter </td>
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</tr><tr
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style="vertical-align:baseline;" id="TBL-22-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-22-5-1"
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class="td11">Short Precision Complex</td><td style="white-space:nowrap; text-align:left;" id="TBL-22-5-2"
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class="td11">psb_scatter </td>
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</tr><tr
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style="vertical-align:baseline;" id="TBL-22-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-22-6-1"
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class="td11">Long Precision Complex </td><td style="white-space:nowrap; text-align:left;" id="TBL-22-6-2"
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class="td11">psb_scatter </td>
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</tr><tr
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class="hline"><td><hr></td><td><hr></td></tr><tr
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style="vertical-align:baseline;" id="TBL-22-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-22-7-1"
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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 20: </span><span
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class="content">Data types</span></div><!--tex4ht:label?: x39-76001r20 -->
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</div><hr class="endfloat" />
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</div>
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<!--l. 482--><p class="indent" > <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_scatter</span><span
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class="cmtt-10">(</span><span
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class="cmtt-10">glob_x</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">loc_x</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">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><span
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class="cmtt-10">root</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">mold</span><span
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class="cmtt-10">)</span>
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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">Synchronous.
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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">glob</span><span
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class="cmbx-10">_x</span> </dt><dd
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class="description">The array that must be scattered into local pieces.<br
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class="newline" />Scope: <span
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class="cmbx-10">global </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: a rank one or two array.
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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">contains data structures for communications.<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: 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">root</span> </dt><dd
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class="description">The process that holds the global copy. If <span
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class="cmmi-10">root </span>= <span
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class="cmsy-10">-</span>1 all the processes have
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a copy of the global vector.<br
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class="newline" />Scope: <span
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class="cmbx-10">global </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 variable <span
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class="cmsy-10">-</span>1 <span
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class="cmsy-10">≤ </span><span
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class="cmmi-10">root </span><span
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class="cmsy-10">≤ </span><span
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class="cmmi-10">np </span><span
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class="cmsy-10">- </span>1, default <span class="lstinline"></span><span
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class="cmtt-10">psb_root_</span>,
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i.e. process 0.
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</dd><dt class="description">
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<span
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class="cmbx-10">mold</span> </dt><dd
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class="description">The desired dynamic type for the internal vector storage.<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 object of a class derived from <a
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id="vbasedata"><span
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class="cmtt-10">psb</span><span
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class="cmtt-10">_T</span><span
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class="cmtt-10">_base</span><span
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class="cmtt-10">_vect</span><span
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class="cmtt-10">_type</span></a>;
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this is only allowed when loc_x is of type <a
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href="userhtmlsu7.html#vdata"><span
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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>.
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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">loc</span><span
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class="cmbx-10">_x</span> </dt><dd
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class="description">the local portion of global dense matrix <span
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class="cmmi-10">glob</span>_<span
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class="cmmi-10">x</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">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" />Specified as: a rank one or two ALLOCATABLE array or an object of type
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<a
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href="userhtmlsu7.html#vdata"><span
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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 the type indicated in Table <a
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href="#x39-76001r20">20<!--tex4ht:ref: tab:scatter --></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.</dd></dl>
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<!--l. 1--><div class="crosslinks"><p class="noindent">[<a
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href="userhtmlsu28.html" >prev</a>] [<a
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href="userhtmlsu28.html#tailuserhtmlsu28.html" >prev-tail</a>] [<a
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href="userhtmlsu29.html" >front</a>] [<a
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href="userhtmlsu28.html#userhtmlsu31.html" >up</a>] </p></div>
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<!--l. 1--><p class="indent" > <a
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id="tailuserhtmlsu29.html"></a>
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</body></html>
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