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Document non-blocking collectives.

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Salvatore Filippone
2022-03-28 14:04:52 +02:00
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</head><body
>
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<pre class="verbatim" id="verbatim-70">
call&#x00A0;psb_sum(ctxt,&#x00A0;dat,&#x00A0;root)
call&#x00A0;psb_sum(ctxt,&#x00A0;dat,&#x00A0;root&#x00A0;[,&#x00A0;mode,&#x00A0;request])
</pre>
<!--l. 329--><p class="nopar" >
<!--l. 331--><p class="indent" > This subroutine implements a sum reduction operation based on the underlying
<!--l. 349--><p class="nopar" >
<!--l. 351--><p class="indent" > This subroutine implements a sum reduction operation based on the underlying
communication library.
<dl class="description"><dt class="description">
<span
@@ -74,8 +74,38 @@ class="cmsy-10">-</span>1 <span
class="cmmi-10">&#x003C;</span>= <span
class="cmmi-10">root &#x003C;</span>= <span
class="cmmi-10">np </span><span
class="cmsy-10">- </span>1, default -1. &#x00A0;</dd></dl>
<!--l. 358--><p class="indent" >
class="cmsy-10">- </span>1, default -1. &#x00A0;
</dd><dt class="description">
<span
class="cmbx-10">mode</span> </dt><dd
class="description">Whether the call is started in non-blocking mode and completed later,
or is executed fully.<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, with the value determined by the bitwise OR of
<span class="obeylines-h"><span class="verb"><span
class="cmtt-10">psb_collective_start_</span></span></span>, <span class="obeylines-h"><span class="verb"><span
class="cmtt-10">psb_collective_end_</span></span></span>. Default: both fields are
selected.<br
class="newline" />
</dd><dt class="description">
<span
class="cmbx-10">request</span> </dt><dd
class="description">A request variable to check for operation completion.<br
class="newline" />Scope: <span
class="cmbx-10">local</span>.<br
class="newline" />Type: <span
class="cmbx-10">optional</span>.<br
class="newline" />Intent: <span
class="cmbx-10">inout</span>.<br
class="newline" />If <span class="obeylines-h"><span class="verb"><span
class="cmtt-10">mode</span></span></span> does not specifies immediate completion, then this variable must
be present.</dd></dl>
<!--l. 392--><p class="indent" >
<dl class="description"><dt class="description">
<span
class="cmbx-10">On Return</span> </dt><dd
@@ -92,12 +122,22 @@ class="newline" />Intent: <span
class="cmbx-10">inout</span>.<br
class="newline" />Specified as: an integer, real or complex variable, which may be a scalar,
or a rank 1 or 2 array. <br
class="newline" />Type, kind, rank and size must agree on all processes.</dd></dl>
<!--l. 369--><p class="noindent" ><span
class="newline" />Type, kind, rank and size must agree on all processes.
</dd><dt class="description">
<span
class="cmbx-10">request</span> </dt><dd
class="description">A request variable to check for operation completion.<br
class="newline" />Scope: <span
class="cmbx-10">local</span>.<br
class="newline" />Type: <span
class="cmbx-10">optional</span>.<br
class="newline" />Intent: <span
class="cmbx-10">inout</span>.<br
class="newline" />If <span class="obeylines-h"><span class="verb"><span
class="cmtt-10">mode</span></span></span> does not specifies immediate completion, then this variable must
be present.</dd></dl>
<!--l. 409--><p class="noindent" ><span
class="cmbx-12">Notes</span>
<ol class="enumerate1" >
<li
class="enumerate" id="x78-115002x1">The <span class="obeylines-h"><span class="verb"><span
@@ -113,12 +153,12 @@ class="cmtt-10">dat</span></span></span> argument may also be a long integer sca
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