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| author | DongHun Kwak <dh0128.kwak@samsung.com> | 2017-09-13 11:05:34 +0900 |
|---|---|---|
| committer | DongHun Kwak <dh0128.kwak@samsung.com> | 2017-09-13 11:06:28 +0900 |
| commit | 34bd32e225e2a8a94104489b31c42e5801cc1f4a (patch) | |
| tree | d021b579a0c190354819974e1eaf0baa54b551f3 /doc/html/boost/mpi/reduce.html | |
| parent | f763a99a501650eff2c60288aa6f10ef916d769e (diff) | |
| download | boost-34bd32e225e2a8a94104489b31c42e5801cc1f4a.tar.gz boost-34bd32e225e2a8a94104489b31c42e5801cc1f4a.tar.bz2 boost-34bd32e225e2a8a94104489b31c42e5801cc1f4a.zip | |
Imported Upstream version 1.63.0upstream/1.63.0
Change-Id: Iac85556a04b7e58d63ba636dedb0986e3555714a
Signed-off-by: DongHun Kwak <dh0128.kwak@samsung.com>
Diffstat (limited to 'doc/html/boost/mpi/reduce.html')
| -rw-r--r-- | doc/html/boost/mpi/reduce.html | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/doc/html/boost/mpi/reduce.html b/doc/html/boost/mpi/reduce.html index 61ede96416..00d01fe407 100644 --- a/doc/html/boost/mpi/reduce.html +++ b/doc/html/boost/mpi/reduce.html @@ -45,7 +45,7 @@ <span class="keyword">void</span> <span class="identifier">reduce</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">Op</span> op<span class="special">,</span> <span class="keyword">int</span> root<span class="special">)</span><span class="special">;</span></pre></div> <div class="refsect1"> -<a name="idm45927880056592"></a><h2>Description</h2> +<a name="idp513757600"></a><h2>Description</h2> <p><code class="computeroutput">reduce</code> is a collective algorithm that combines the values stored by each process into a single value at the <code class="computeroutput">root</code>. The values can be combined arbitrarily, specified via a function object. 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 the <code class="computeroutput">root</code>, followed by an <code class="computeroutput">std::accumulate()</code> over the gathered values and using the operation <code class="computeroutput">op</code>.</p> <p>When the type <code class="computeroutput">T</code> has an associated MPI data type, this routine invokes <code class="computeroutput">MPI_Reduce</code> to perform the reduction. If possible, built-in MPI operations will be used; otherwise, <code class="computeroutput">reduce()</code> will create a custom MPI_Op for the call to MPI_Reduce.</p> <p> |