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| author | DongHun Kwak <dh0128.kwak@samsung.com> | 2016-10-06 10:33:54 +0900 |
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| committer | DongHun Kwak <dh0128.kwak@samsung.com> | 2016-10-06 10:36:09 +0900 |
| commit | d9ec475d945d3035377a0d89ed42e382d8988891 (patch) | |
| tree | 34aff2cee4b209906243ab5499d61f3edee2982f /doc/html/boost/mpi/scan.html | |
| parent | 71d216b90256936a9638f325af9bc69d720e75de (diff) | |
| download | boost-d9ec475d945d3035377a0d89ed42e382d8988891.tar.gz boost-d9ec475d945d3035377a0d89ed42e382d8988891.tar.bz2 boost-d9ec475d945d3035377a0d89ed42e382d8988891.zip | |
Imported Upstream version 1.60.0
Change-Id: Ie709530d6d5841088ceaba025cbe175a4ef43050
Signed-off-by: DongHun Kwak <dh0128.kwak@samsung.com>
Diffstat (limited to 'doc/html/boost/mpi/scan.html')
| -rw-r--r-- | doc/html/boost/mpi/scan.html | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/doc/html/boost/mpi/scan.html b/doc/html/boost/mpi/scan.html index 9d5323b21a..f1daf88e08 100644 --- a/doc/html/boost/mpi/scan.html +++ b/doc/html/boost/mpi/scan.html @@ -42,7 +42,7 @@ <span class="keyword">void</span> <span class="identifier">scan</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="communicator.html" title="Class communicator">communicator</a> <span class="special">&</span> comm<span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">*</span> in_values<span class="special">,</span> <span class="keyword">int</span> n<span class="special">,</span> <span class="identifier">T</span> <span class="special">*</span> out_values<span class="special">,</span> <span class="identifier">Op</span> op<span class="special">)</span><span class="special">;</span></pre></div> <div class="refsect1"> -<a name="idp337982768"></a><h2>Description</h2> +<a name="idm45555223575024"></a><h2>Description</h2> <p><code class="computeroutput">scan</code> is a collective algorithm that combines the values stored by each process with the values of all processes with a smaller rank. The values can be arbitrarily combined, specified via a function object <code class="computeroutput">op</code>. The type <code class="computeroutput">T</code> of the values may be any type that is serializable or has an associated MPI data type. One can think of this operation as a <code class="computeroutput">gather</code> to some process, followed by an <code class="computeroutput">std::prefix_sum()</code> over the gathered values using the operation <code class="computeroutput">op</code>. The ith process returns the ith value emitted by <code class="computeroutput">std::prefix_sum()</code>.</p> <p>When the type <code class="computeroutput">T</code> has an associated MPI data type, this routine invokes <code class="computeroutput">MPI_Scan</code> to perform the reduction. If possible, built-in MPI operations will be used; otherwise, <code class="computeroutput">scan()</code> will create a custom <code class="computeroutput">MPI_Op</code> for the call to MPI_Scan.</p> <p> |