[DEV] add v1.76.0

This commit is contained in:
2021-10-05 21:37:46 +02:00
parent a97e9ae7d4
commit d0115b733d
45133 changed files with 4744437 additions and 1026325 deletions

View File

@@ -0,0 +1,55 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Acknowledgments</title>
<link rel="stylesheet" href="../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
<link rel="home" href="../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset">
<link rel="up" href="../mpi.html" title="Chapter 26. Boost.MPI">
<link rel="prev" href="history.html" title="Revision History">
<link rel="next" href="../multi_array.html" title="Chapter 27. Boost.MultiArray Reference Manual">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table cellpadding="2" width="100%"><tr>
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../boost.png"></td>
<td align="center"><a href="../../../index.html">Home</a></td>
<td align="center"><a href="../../../libs/libraries.htm">Libraries</a></td>
<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td>
<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
<td align="center"><a href="../../../more/index.htm">More</a></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="history.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../mpi.html"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../multi_array.html"><img src="../../../doc/src/images/next.png" alt="Next"></a>
</div>
<div class="section">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="mpi.acknowledge"></a><a class="link" href="acknowledge.html" title="Acknowledgments">Acknowledgments</a>
</h2></div></div></div>
<p>
Boost.MPI was developed with support from Zurcher Kantonalbank. Daniel Egloff
and Michael Gauckler contributed many ideas to Boost.MPI's design, particularly
in the design of its abstractions for MPI data types and the novel skeleton/context
mechanism for large data structures. Prabhanjan (Anju) Kambadur developed the
predecessor to Boost.MPI that proved the usefulness of the Serialization library
in an MPI setting and the performance benefits of specialization in a C++ abstraction
layer for MPI. Jeremy Siek managed the formal review of Boost.MPI.
</p>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright © 2005-2007 Douglas Gregor,
Matthias Troyer, Trustees of Indiana University<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at &lt;ulink url="http://www.boost.org/LICENSE_1_0.txt"&gt;
http://www.boost.org/LICENSE_1_0.txt &lt;/ulink&gt;)
</p>
</div></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="history.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../mpi.html"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../multi_array.html"><img src="../../../doc/src/images/next.png" alt="Next"></a>
</div>
</body>
</html>

2814
doc/html/mpi/c_mapping.html Normal file

File diff suppressed because it is too large Load Diff

79
doc/html/mpi/design.html Normal file
View File

@@ -0,0 +1,79 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Design Philosophy</title>
<link rel="stylesheet" href="../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
<link rel="home" href="../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset">
<link rel="up" href="../mpi.html" title="Chapter 26. Boost.MPI">
<link rel="prev" href="python.html" title="Python Bindings">
<link rel="next" href="performance.html" title="Performance Evaluation">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table cellpadding="2" width="100%"><tr>
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../boost.png"></td>
<td align="center"><a href="../../../index.html">Home</a></td>
<td align="center"><a href="../../../libs/libraries.htm">Libraries</a></td>
<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td>
<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
<td align="center"><a href="../../../more/index.htm">More</a></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="python.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../mpi.html"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="performance.html"><img src="../../../doc/src/images/next.png" alt="Next"></a>
</div>
<div class="section">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="mpi.design"></a><a class="link" href="design.html" title="Design Philosophy">Design Philosophy</a>
</h2></div></div></div>
<p>
The design philosophy of the Parallel MPI library is very simple: be both convenient
and efficient. MPI is a library built for high-performance applications, but
it's FORTRAN-centric, performance-minded design makes it rather inflexible
from the C++ point of view: passing a string from one process to another is
inconvenient, requiring several messages and explicit buffering; passing a
container of strings from one process to another requires an extra level of
manual bookkeeping; and passing a map from strings to containers of strings
is positively infuriating. The Parallel MPI library allows all of these data
types to be passed using the same simple <code class="computeroutput"><span class="identifier">send</span><span class="special">()</span></code> and <code class="computeroutput"><span class="identifier">recv</span><span class="special">()</span></code> primitives. Likewise, collective operations
such as <code class="computeroutput"><a class="link" href="../boost/mpi/reduce.html" title="Function reduce">reduce()</a></code> allow arbitrary data types
and function objects, much like the C++ Standard Library would.
</p>
<p>
The higher-level abstractions provided for convenience must not have an impact
on the performance of the application. For instance, sending an integer via
<code class="computeroutput"><span class="identifier">send</span></code> must be as efficient as
a call to <code class="computeroutput"><span class="identifier">MPI_Send</span></code>, which means
that it must be implemented by a simple call to <code class="computeroutput"><span class="identifier">MPI_Send</span></code>;
likewise, an integer <code class="computeroutput"><a class="link" href="../boost/mpi/reduce.html" title="Function reduce">reduce()</a></code> using <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">plus</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span></code> must
be implemented with a call to <code class="computeroutput"><span class="identifier">MPI_Reduce</span></code>
on integers using the <code class="computeroutput"><span class="identifier">MPI_SUM</span></code>
operation: anything less will impact performance. In essence, this is the "don't
pay for what you don't use" principle: if the user is not transmitting
strings, s/he should not pay the overhead associated with strings.
</p>
<p>
Sometimes, achieving maximal performance means foregoing convenient abstractions
and implementing certain functionality using lower-level primitives. For this
reason, it is always possible to extract enough information from the abstractions
in Boost.MPI to minimize the amount of effort required to interface between
Boost.MPI and the C MPI library.
</p>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright © 2005-2007 Douglas Gregor,
Matthias Troyer, Trustees of Indiana University<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at &lt;ulink url="http://www.boost.org/LICENSE_1_0.txt"&gt;
http://www.boost.org/LICENSE_1_0.txt &lt;/ulink&gt;)
</p>
</div></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="python.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../mpi.html"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="performance.html"><img src="../../../doc/src/images/next.png" alt="Next"></a>
</div>
</body>
</html>

View File

@@ -0,0 +1,391 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Getting started</title>
<link rel="stylesheet" href="../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
<link rel="home" href="../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset">
<link rel="up" href="../mpi.html" title="Chapter 26. Boost.MPI">
<link rel="prev" href="../mpi.html" title="Chapter 26. Boost.MPI">
<link rel="next" href="tutorial.html" title="Tutorial">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table cellpadding="2" width="100%"><tr>
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../boost.png"></td>
<td align="center"><a href="../../../index.html">Home</a></td>
<td align="center"><a href="../../../libs/libraries.htm">Libraries</a></td>
<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td>
<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
<td align="center"><a href="../../../more/index.htm">More</a></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="../mpi.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../mpi.html"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="tutorial.html"><img src="../../../doc/src/images/next.png" alt="Next"></a>
</div>
<div class="section">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="mpi.getting_started"></a><a class="link" href="getting_started.html" title="Getting started">Getting started</a>
</h2></div></div></div>
<div class="toc"><dl class="toc">
<dt><span class="section"><a href="getting_started.html#mpi.getting_started.implementation">MPI Implementation</a></span></dt>
<dt><span class="section"><a href="getting_started.html#mpi.getting_started.config">Configure and Build</a></span></dt>
<dt><span class="section"><a href="getting_started.html#mpi.getting_started.using">Using Boost.MPI</a></span></dt>
</dl></div>
<p>
Getting started with Boost.MPI requires a working MPI implementation, a recent
version of Boost, and some configuration information.
</p>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="mpi.getting_started.implementation"></a><a class="link" href="getting_started.html#mpi.getting_started.implementation" title="MPI Implementation">MPI Implementation</a>
</h3></div></div></div>
<p>
To get started with Boost.MPI, you will first need a working MPI implementation.
There are many conforming <a href="http://www-unix.mcs.anl.gov/mpi/implementations.html" target="_top">MPI
implementations</a> available. Boost.MPI should work with any of the
implementations, although it has only been tested extensively with:
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
<a href="http://www.open-mpi.org" target="_top">Open MPI</a>
</li>
<li class="listitem">
<a href="http://www-unix.mcs.anl.gov/mpi/mpich/" target="_top">MPICH2</a>
</li>
<li class="listitem">
<a href="https://software.intel.com/en-us/intel-mpi-library" target="_top">Intel
MPI</a>
</li>
</ul></div>
<p>
You can test your implementation using the following simple program, which
passes a message from one processor to another. Each processor prints a message
to standard output.
</p>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">mpi</span><span class="special">.</span><span class="identifier">h</span><span class="special">&gt;</span>
<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">iostream</span><span class="special">&gt;</span>
<span class="keyword">int</span> <span class="identifier">main</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">argc</span><span class="special">,</span> <span class="keyword">char</span><span class="special">*</span> <span class="identifier">argv</span><span class="special">[])</span>
<span class="special">{</span>
<span class="identifier">MPI_Init</span><span class="special">(&amp;</span><span class="identifier">argc</span><span class="special">,</span> <span class="special">&amp;</span><span class="identifier">argv</span><span class="special">);</span>
<span class="keyword">int</span> <span class="identifier">rank</span><span class="special">;</span>
<span class="identifier">MPI_Comm_rank</span><span class="special">(</span><span class="identifier">MPI_COMM_WORLD</span><span class="special">,</span> <span class="special">&amp;</span><span class="identifier">rank</span><span class="special">);</span>
<span class="keyword">if</span> <span class="special">(</span><span class="identifier">rank</span> <span class="special">==</span> <span class="number">0</span><span class="special">)</span> <span class="special">{</span>
<span class="keyword">int</span> <span class="identifier">value</span> <span class="special">=</span> <span class="number">17</span><span class="special">;</span>
<span class="keyword">int</span> <span class="identifier">result</span> <span class="special">=</span> <span class="identifier">MPI_Send</span><span class="special">(&amp;</span><span class="identifier">value</span><span class="special">,</span> <span class="number">1</span><span class="special">,</span> <span class="identifier">MPI_INT</span><span class="special">,</span> <span class="number">1</span><span class="special">,</span> <span class="number">0</span><span class="special">,</span> <span class="identifier">MPI_COMM_WORLD</span><span class="special">);</span>
<span class="keyword">if</span> <span class="special">(</span><span class="identifier">result</span> <span class="special">==</span> <span class="identifier">MPI_SUCCESS</span><span class="special">)</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"Rank 0 OK!"</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
<span class="special">}</span> <span class="keyword">else</span> <span class="keyword">if</span> <span class="special">(</span><span class="identifier">rank</span> <span class="special">==</span> <span class="number">1</span><span class="special">)</span> <span class="special">{</span>
<span class="keyword">int</span> <span class="identifier">value</span><span class="special">;</span>
<span class="keyword">int</span> <span class="identifier">result</span> <span class="special">=</span> <span class="identifier">MPI_Recv</span><span class="special">(&amp;</span><span class="identifier">value</span><span class="special">,</span> <span class="number">1</span><span class="special">,</span> <span class="identifier">MPI_INT</span><span class="special">,</span> <span class="number">0</span><span class="special">,</span> <span class="number">0</span><span class="special">,</span> <span class="identifier">MPI_COMM_WORLD</span><span class="special">,</span>
<span class="identifier">MPI_STATUS_IGNORE</span><span class="special">);</span>
<span class="keyword">if</span> <span class="special">(</span><span class="identifier">result</span> <span class="special">==</span> <span class="identifier">MPI_SUCCESS</span> <span class="special">&amp;&amp;</span> <span class="identifier">value</span> <span class="special">==</span> <span class="number">17</span><span class="special">)</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"Rank 1 OK!"</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
<span class="special">}</span>
<span class="identifier">MPI_Finalize</span><span class="special">();</span>
<span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
<span class="special">}</span>
</pre>
<p>
You should compile and run this program on two processors. To do this, consult
the documentation for your MPI implementation. With <a href="http://www.open-mpi.org" target="_top">OpenMPI</a>,
for instance, you compile with the <code class="computeroutput"><span class="identifier">mpiCC</span></code>
or <code class="computeroutput"><span class="identifier">mpic</span><span class="special">++</span></code>
compiler, boot the LAM/MPI daemon, and run your program via <code class="computeroutput"><span class="identifier">mpirun</span></code>. For instance, if your program is
called <code class="computeroutput"><span class="identifier">mpi</span><span class="special">-</span><span class="identifier">test</span><span class="special">.</span><span class="identifier">cpp</span></code>,
use the following commands:
</p>
<pre class="programlisting">mpiCC -o mpi-test mpi-test.cpp
lamboot
mpirun -np 2 ./mpi-test
lamhalt
</pre>
<p>
When you run this program, you will see both <code class="computeroutput"><span class="identifier">Rank</span>
<span class="number">0</span> <span class="identifier">OK</span><span class="special">!</span></code> and <code class="computeroutput"><span class="identifier">Rank</span>
<span class="number">1</span> <span class="identifier">OK</span><span class="special">!</span></code> printed to the screen. However, they may
be printed in any order and may even overlap each other. The following output
is perfectly legitimate for this MPI program:
</p>
<pre class="programlisting">Rank Rank 1 OK!
0 OK!
</pre>
<p>
If your output looks something like the above, your MPI implementation appears
to be working with a C++ compiler and we're ready to move on.
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="mpi.getting_started.config"></a><a class="link" href="getting_started.html#mpi.getting_started.config" title="Configure and Build">Configure and Build</a>
</h3></div></div></div>
<div class="toc"><dl class="toc">
<dt><span class="section"><a href="getting_started.html#mpi.getting_started.config.bootstrap">Bootstrap</a></span></dt>
<dt><span class="section"><a href="getting_started.html#mpi.getting_started.config.setup">Setting up your MPI
Implementation</a></span></dt>
<dt><span class="section"><a href="getting_started.html#mpi.getting_started.config.build">Build</a></span></dt>
<dt><span class="section"><a href="getting_started.html#mpi.getting_started.config.tests">Tests</a></span></dt>
<dt><span class="section"><a href="getting_started.html#mpi.getting_started.config.installation">Installation</a></span></dt>
</dl></div>
<p>
As the rest of Boost, Boost.MPI uses version 2 of the <a href="http://www.boost.org/doc/html/bbv2.html" target="_top">Boost.Build</a>
system for configuring and building the library binary.
</p>
<p>
Please refer to the general Boost installation instructions for <a href="http://www.boost.org/doc/libs/release/more/getting_started/unix-variants.html#prepare-to-use-a-boost-library-binary" target="_top">Unix
Variant</a> (including Unix, Linux and MacOS) or <a href="http://www.boost.org/doc/libs/1_58_0/more/getting_started/windows.html#prepare-to-use-a-boost-library-binary" target="_top">Windows</a>.
The simplified build instructions should apply on most platforms with a few
specific modifications described below.
</p>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="mpi.getting_started.config.bootstrap"></a><a class="link" href="getting_started.html#mpi.getting_started.config.bootstrap" title="Bootstrap">Bootstrap</a>
</h4></div></div></div>
<p>
As explained in the boost installation instructions, running the bootstrap
(<code class="computeroutput"><span class="special">./</span><span class="identifier">bootstrap</span><span class="special">.</span><span class="identifier">sh</span></code> for
unix variants or <code class="computeroutput"><span class="identifier">bootstrap</span><span class="special">.</span><span class="identifier">bat</span></code>
for Windows) from the boost root directory will produce a 'project-config.jam`
file. You need to edit that file and add the following line:
</p>
<pre class="programlisting"><span class="keyword">using</span> <span class="identifier">mpi</span> <span class="special">;</span>
</pre>
<p>
Alternatively, you can explicitly provide the list of Boost libraries you
want to build. Please refer to the <code class="computeroutput"><span class="special">--</span><span class="identifier">help</span></code> option of the <code class="computeroutput"><span class="identifier">bootstrap</span></code>
script.
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="mpi.getting_started.config.setup"></a><a class="link" href="getting_started.html#mpi.getting_started.config.setup" title="Setting up your MPI Implementation">Setting up your MPI
Implementation</a>
</h4></div></div></div>
<div class="toc"><dl class="toc"><dt><span class="section"><a href="getting_started.html#mpi.getting_started.config.setup.troubleshooting">Trouble
shooting</a></span></dt></dl></div>
<p>
First, you need to scan the <code class="literal">include/boost/mpi/config.hpp</code>
file and check if some settings need to be modified for your MPI implementation
or preferences.
</p>
<p>
In particular, the <code class="computeroutput"><a class="link" href="../BOOST_MPI_HOMOGENEOUS.html" title="Macro BOOST_MPI_HOMOGENEOUS">BOOST_MPI_HOMOGENEOUS</a></code>
macro, that you will need to comment out if you plan to run on a heterogeneous
set of machines. See the <a class="link" href="tutorial.html#mpi.tutorial.performance_optimizations.homogeneous_machines" title="Homogeneous Machines">optimization</a>
notes below.
</p>
<p>
Most MPI implementations require specific compilation and link options.
In order to mask theses details to the user, most MPI implementations provide
wrappers which silently pass those options to the compiler.
</p>
<p>
Depending on your MPI implementation, some work might be needed to tell
Boost which specific MPI option to use. This is done through the <code class="computeroutput"><span class="keyword">using</span> <span class="identifier">mpi</span> <span class="special">;</span></code> directive in the <code class="computeroutput"><span class="identifier">project</span><span class="special">-</span><span class="identifier">config</span><span class="special">.</span><span class="identifier">jam</span></code>
file those general form is (do not forget to leave spaces around <span class="bold"><strong>:</strong></span> and before <span class="bold"><strong>;</strong></span>):
</p>
<pre class="programlisting">using mpi
: [&lt;MPI compiler wrapper&gt;]
: [&lt;compilation and link options&gt;]
: [&lt;mpi runner&gt;] ;
</pre>
<p>
Depending on your installation and MPI distribution, the build system might
be able to find all the required informations and you just need to specify:
</p>
<pre class="programlisting">using mpi ;
</pre>
<div class="section">
<div class="titlepage"><div><div><h5 class="title">
<a name="mpi.getting_started.config.setup.troubleshooting"></a><a class="link" href="getting_started.html#mpi.getting_started.config.setup.troubleshooting" title="Trouble shooting">Trouble
shooting</a>
</h5></div></div></div>
<p>
Most of the time, specially with production HPC clusters, some work will
need to be done.
</p>
<p>
Here is a list of the most common issues and suggestions on how to fix
those.
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
<span class="bold"><strong>Your wrapper is not in your path or does ot
have a standard name </strong></span>
</li></ul></div>
<p>
You will need to tell the build system how to call it using the first
parameter:
</p>
<pre class="programlisting">using mpi : /opt/mpi/bullxmpi/1.2.8.3/bin/mpicc ;
</pre>
<div class="warning"><table border="0" summary="Warning">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Warning]" src="../../../doc/src/images/warning.png"></td>
<th align="left">Warning</th>
</tr>
<tr><td align="left" valign="top"><p>
Boost.MPI only uses the C interface, so specifying the C wrapper should
be enough. But some implementations will insist on importing the C++
bindings.
</p></td></tr>
</table></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
<span class="bold"><strong>Your wrapper is really eccentric or does not
exist</strong></span>
</li></ul></div>
<p>
With some implementations, or with some specific integration<a href="#ftn.mpi.getting_started.config.setup.troubleshooting.f0" class="footnote" name="mpi.getting_started.config.setup.troubleshooting.f0"><sup class="footnote">[10]</sup></a> you will need to provide the compilation and link options
through de second parameter using 'jam' directives. The following type
configuration used to be required for some specific Intel MPI implementation
(in such a case, the name of the wrapper can be left blank):
</p>
<pre class="programlisting">using mpi : mpiicc :
&lt;library-path&gt;/softs/intel/impi/5.0.1.035/intel64/lib
&lt;library-path&gt;/softs/intel/impi/5.0.1.035/intel64/lib/release_mt
&lt;include&gt;/softs/intel/impi/5.0.1.035/intel64/include
&lt;find-shared-library&gt;mpifort
&lt;find-shared-library&gt;mpi_mt
&lt;find-shared-library&gt;mpigi
&lt;find-shared-library&gt;dl
&lt;find-shared-library&gt;rt ;
</pre>
<p>
As a convenience, MPI wrappers usually have an option that provides the
required informations, which usually starts with <code class="computeroutput"><span class="special">--</span><span class="identifier">show</span></code>. You can use those to find out
the requested jam directive:
</p>
<pre class="programlisting">$ mpiicc -show
icc -I/softs/.../include ... -L/softs/.../lib ... -Xlinker -rpath -Xlinker /softs/.../lib .... -lmpi -ldl -lrt -lpthread
$
</pre>
<pre class="programlisting">$ mpicc --showme
icc -I/opt/.../include -pthread -L/opt/.../lib -lmpi -ldl -lm -lnuma -Wl,--export-dynamic -lrt -lnsl -lutil -lm -ldl
$ mpicc --showme:compile
-I/opt/mpi/bullxmpi/1.2.8.3/include -pthread
$ mpicc --showme:link
-pthread -L/opt/.../lib -lmpi -ldl -lm -lnuma -Wl,--export-dynamic -lrt -lnsl -lutil -lm -ldl
$
</pre>
<p>
To see the results of MPI auto-detection, pass <code class="computeroutput"><span class="special">--</span><span class="identifier">debug</span><span class="special">-</span><span class="identifier">configuration</span></code> on the bjam command line.
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
<span class="bold"><strong>The launch syntax cannot be detected</strong></span>
</li></ul></div>
<div class="note"><table border="0" summary="Note">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../doc/src/images/note.png"></td>
<th align="left">Note</th>
</tr>
<tr><td align="left" valign="top"><p>
This is only used when <a class="link" href="getting_started.html#mpi.getting_started.config.tests" title="Tests">running
the tests</a>.
</p></td></tr>
</table></div>
<p>
If you need to use a special command to launch an MPI program, you will
need to specify it through the third parameter of the <code class="computeroutput"><span class="keyword">using</span>
<span class="identifier">mpi</span></code> directive.
</p>
<p>
So, assuming you launch the <code class="computeroutput"><span class="identifier">all_gather_test</span></code>
program with:
</p>
<pre class="programlisting">$mpiexec.hydra -np 4 all_gather_test
</pre>
<p>
The directive will look like:
</p>
<pre class="programlisting">using mpi : mpiicc :
[&lt;compilation and link options&gt;]
: mpiexec.hydra -n ;
</pre>
</div>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="mpi.getting_started.config.build"></a><a class="link" href="getting_started.html#mpi.getting_started.config.build" title="Build">Build</a>
</h4></div></div></div>
<p>
To build the whole Boost distribution:
</p>
<pre class="programlisting">$cd &lt;boost distribution&gt;
$./b2
</pre>
<p>
To build the Boost.MPI library and dependancies:
</p>
<pre class="programlisting">$cd &lt;boost distribution&gt;/lib/mpi/build
$../../../b2
</pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="mpi.getting_started.config.tests"></a><a class="link" href="getting_started.html#mpi.getting_started.config.tests" title="Tests">Tests</a>
</h4></div></div></div>
<p>
You can run the regression tests with:
</p>
<pre class="programlisting">$cd &lt;boost distribution&gt;/lib/mpi/test
$../../../b2
</pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="mpi.getting_started.config.installation"></a><a class="link" href="getting_started.html#mpi.getting_started.config.installation" title="Installation">Installation</a>
</h4></div></div></div>
<p>
To install the whole Boost distribution:
</p>
<pre class="programlisting">$cd &lt;boost distribution&gt;
$./b2 install
</pre>
</div>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="mpi.getting_started.using"></a><a class="link" href="getting_started.html#mpi.getting_started.using" title="Using Boost.MPI">Using Boost.MPI</a>
</h3></div></div></div>
<p>
To build applications based on Boost.MPI, compile and link them as you normally
would for MPI programs, but remember to link against the <code class="computeroutput"><span class="identifier">boost_mpi</span></code>
and <code class="computeroutput"><span class="identifier">boost_serialization</span></code> libraries,
e.g.,
</p>
<pre class="programlisting">mpic++ -I/path/to/boost/mpi my_application.cpp -Llibdir \
-lboost_mpi -lboost_serialization
</pre>
<p>
If you plan to use the <a class="link" href="python.html" title="Python Bindings">Python bindings</a>
for Boost.MPI in conjunction with the C++ Boost.MPI, you will also need to
link against the boost_mpi_python library, e.g., by adding <code class="computeroutput"><span class="special">-</span><span class="identifier">lboost_mpi_python</span><span class="special">-</span><span class="identifier">gcc</span></code> to
your link command. This step will only be necessary if you intend to <a class="link" href="python.html#mpi.python.user_data" title="Transmitting User-Defined Data">register C++ types</a> or use the <a class="link" href="python.html#mpi.python.skeleton_content" title="Skeleton/Content Mechanism">skeleton/content mechanism</a> from
within Python.
</p>
</div>
<div class="footnotes">
<br><hr style="width:100; text-align:left;margin-left: 0">
<div id="ftn.mpi.getting_started.config.setup.troubleshooting.f0" class="footnote"><p><a href="#mpi.getting_started.config.setup.troubleshooting.f0" class="para"><sup class="para">[10] </sup></a>
Some HPC cluster will insist that the users uss theirs own in house
interface to the MPI system.
</p></div>
</div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright © 2005-2007 Douglas Gregor,
Matthias Troyer, Trustees of Indiana University<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at &lt;ulink url="http://www.boost.org/LICENSE_1_0.txt"&gt;
http://www.boost.org/LICENSE_1_0.txt &lt;/ulink&gt;)
</p>
</div></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="../mpi.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../mpi.html"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="tutorial.html"><img src="../../../doc/src/images/next.png" alt="Next"></a>
</div>
</body>
</html>

69
doc/html/mpi/history.html Normal file
View File

@@ -0,0 +1,69 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Revision History</title>
<link rel="stylesheet" href="../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
<link rel="home" href="../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset">
<link rel="up" href="../mpi.html" title="Chapter 26. Boost.MPI">
<link rel="prev" href="performance.html" title="Performance Evaluation">
<link rel="next" href="acknowledge.html" title="Acknowledgments">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table cellpadding="2" width="100%"><tr>
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../boost.png"></td>
<td align="center"><a href="../../../index.html">Home</a></td>
<td align="center"><a href="../../../libs/libraries.htm">Libraries</a></td>
<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td>
<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
<td align="center"><a href="../../../more/index.htm">More</a></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="performance.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../mpi.html"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="acknowledge.html"><img src="../../../doc/src/images/next.png" alt="Next"></a>
</div>
<div class="section">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="mpi.history"></a><a class="link" href="history.html" title="Revision History">Revision History</a>
</h2></div></div></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
<span class="bold"><strong>Boost 1.36.0</strong></span>:
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "><li class="listitem">
Support for non-blocking operations in Python, from Andreas Klöckner
</li></ul></div>
</li>
<li class="listitem">
<span class="bold"><strong>Boost 1.35.0</strong></span>: Initial release, containing
the following post-review changes
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; ">
<li class="listitem">
Support for arrays in all collective operations
</li>
<li class="listitem">
Support default-construction of <code class="computeroutput"><a class="link" href="../boost/mpi/environment.html" title="Class environment">environment</a></code>
</li>
</ul></div>
</li>
<li class="listitem">
<span class="bold"><strong>2006-09-21</strong></span>: Boost.MPI accepted into Boost.
</li>
</ul></div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright © 2005-2007 Douglas Gregor,
Matthias Troyer, Trustees of Indiana University<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at &lt;ulink url="http://www.boost.org/LICENSE_1_0.txt"&gt;
http://www.boost.org/LICENSE_1_0.txt &lt;/ulink&gt;)
</p>
</div></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="performance.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../mpi.html"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="acknowledge.html"><img src="../../../doc/src/images/next.png" alt="Next"></a>
</div>
</body>
</html>

View File

@@ -0,0 +1,104 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Performance Evaluation</title>
<link rel="stylesheet" href="../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
<link rel="home" href="../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset">
<link rel="up" href="../mpi.html" title="Chapter 26. Boost.MPI">
<link rel="prev" href="design.html" title="Design Philosophy">
<link rel="next" href="history.html" title="Revision History">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table cellpadding="2" width="100%"><tr>
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../boost.png"></td>
<td align="center"><a href="../../../index.html">Home</a></td>
<td align="center"><a href="../../../libs/libraries.htm">Libraries</a></td>
<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td>
<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
<td align="center"><a href="../../../more/index.htm">More</a></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="design.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../mpi.html"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="history.html"><img src="../../../doc/src/images/next.png" alt="Next"></a>
</div>
<div class="section">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="mpi.performance"></a><a class="link" href="performance.html" title="Performance Evaluation">Performance Evaluation</a>
</h2></div></div></div>
<p>
Message-passing performance is crucial in high-performance distributed computing.
To evaluate the performance of Boost.MPI, we modified the standard <a href="http://www.scl.ameslab.gov/netpipe/" target="_top">NetPIPE</a>
benchmark (version 3.6.2) to use Boost.MPI and compared its performance against
raw MPI. We ran five different variants of the NetPIPE benchmark:
</p>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
MPI: The unmodified NetPIPE benchmark.
</li>
<li class="listitem">
Boost.MPI: NetPIPE modified to use Boost.MPI calls for communication.
</li>
<li class="listitem">
MPI (Datatypes): NetPIPE modified to use a derived datatype (which itself
contains a single <code class="computeroutput"><span class="identifier">MPI_BYTE</span></code>)
rather than a fundamental datatype.
</li>
<li class="listitem">
Boost.MPI (Datatypes): NetPIPE modified to use a user-defined type <code class="computeroutput"><span class="identifier">Char</span></code> in place of the fundamental <code class="computeroutput"><span class="keyword">char</span></code> type. The <code class="computeroutput"><span class="identifier">Char</span></code>
type contains a single <code class="computeroutput"><span class="keyword">char</span></code>,
a <code class="computeroutput"><span class="identifier">serialize</span><span class="special">()</span></code>
method to make it serializable, and specializes <code class="computeroutput"><a class="link" href="../boost/mpi/is_mpi_datatype.html" title="Struct template is_mpi_datatype">is_mpi_datatype</a></code>
to force Boost.MPI to build a derived MPI data type for it.
</li>
<li class="listitem">
Boost.MPI (Serialized): NetPIPE modified to use a user-defined type <code class="computeroutput"><span class="identifier">Char</span></code> in place of the fundamental <code class="computeroutput"><span class="keyword">char</span></code> type. This <code class="computeroutput"><span class="identifier">Char</span></code>
type contains a single <code class="computeroutput"><span class="keyword">char</span></code>
and is serializable. Unlike the Datatypes case, <code class="computeroutput"><a class="link" href="../boost/mpi/is_mpi_datatype.html" title="Struct template is_mpi_datatype">is_mpi_datatype</a></code>
is <span class="bold"><strong>not</strong></span> specialized, forcing Boost.MPI
to perform many, many serialization calls.
</li>
</ol></div>
<p>
The actual tests were performed on the Odin cluster in the <a href="http://www.cs.indiana.edu/" target="_top">Department
of Computer Science</a> at <a href="http://www.iub.edu" target="_top">Indiana University</a>,
which contains 128 nodes connected via Infiniband. Each node contains 4GB memory
and two AMD Opteron processors. The NetPIPE benchmarks were compiled with Intel's
C++ Compiler, version 9.0, Boost 1.35.0 (prerelease), and <a href="http://www.open-mpi.org/" target="_top">Open
MPI</a> version 1.1. The NetPIPE results follow:
</p>
<p>
<span class="inlinemediaobject"><img src="../../../libs/mpi/doc/netpipe.png"></span>
</p>
<p>
There are a some observations we can make about these NetPIPE results. First
of all, the top two plots show that Boost.MPI performs on par with MPI for
fundamental types. The next two plots show that Boost.MPI performs on par with
MPI for derived data types, even though Boost.MPI provides a much more abstract,
completely transparent approach to building derived data types than raw MPI.
Overall performance for derived data types is significantly worse than for
fundamental data types, but the bottleneck is in the underlying MPI implementation
itself. Finally, when forcing Boost.MPI to serialize characters individually,
performance suffers greatly. This particular instance is the worst possible
case for Boost.MPI, because we are serializing millions of individual characters.
Overall, the additional abstraction provided by Boost.MPI does not impair its
performance.
</p>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright © 2005-2007 Douglas Gregor,
Matthias Troyer, Trustees of Indiana University<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at &lt;ulink url="http://www.boost.org/LICENSE_1_0.txt"&gt;
http://www.boost.org/LICENSE_1_0.txt &lt;/ulink&gt;)
</p>
</div></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="design.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../mpi.html"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="history.html"><img src="../../../doc/src/images/next.png" alt="Next"></a>
</div>
</body>
</html>

298
doc/html/mpi/python.html Normal file
View File

@@ -0,0 +1,298 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Python Bindings</title>
<link rel="stylesheet" href="../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
<link rel="home" href="../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset">
<link rel="up" href="../mpi.html" title="Chapter 26. Boost.MPI">
<link rel="prev" href="../boost/mpi/timer.html" title="Class timer">
<link rel="next" href="design.html" title="Design Philosophy">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table cellpadding="2" width="100%"><tr>
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../boost.png"></td>
<td align="center"><a href="../../../index.html">Home</a></td>
<td align="center"><a href="../../../libs/libraries.htm">Libraries</a></td>
<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td>
<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
<td align="center"><a href="../../../more/index.htm">More</a></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="../boost/mpi/timer.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../mpi.html"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="design.html"><img src="../../../doc/src/images/next.png" alt="Next"></a>
</div>
<div class="section">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="mpi.python"></a><a class="link" href="python.html" title="Python Bindings">Python Bindings</a>
</h2></div></div></div>
<div class="toc"><dl class="toc">
<dt><span class="section"><a href="python.html#mpi.python.quickstart">Quickstart</a></span></dt>
<dt><span class="section"><a href="python.html#mpi.python.user_data">Transmitting User-Defined Data</a></span></dt>
<dt><span class="section"><a href="python.html#mpi.python.collectives">Collectives</a></span></dt>
<dt><span class="section"><a href="python.html#mpi.python.skeleton_content">Skeleton/Content Mechanism</a></span></dt>
<dt><span class="section"><a href="python.html#mpi.python.compatibility">C++/Python MPI Compatibility</a></span></dt>
<dt><span class="section"><a href="python.html#mpi.python.reference">Reference</a></span></dt>
</dl></div>
<p>
Boost.MPI provides an alternative MPI interface from the <a href="http://www.python.org" target="_top">Python</a>
programming language via the <code class="computeroutput"><span class="identifier">boost</span><span class="special">.</span><span class="identifier">mpi</span></code> module.
The Boost.MPI Python bindings, built on top of the C++ Boost.MPI using the
<a href="http://www.boost.org/libs/python/doc" target="_top">Boost.Python</a> library,
provide nearly all of the functionality of Boost.MPI within a dynamic, object-oriented
language.
</p>
<p>
The Boost.MPI Python module can be built and installed from the <code class="computeroutput"><span class="identifier">libs</span><span class="special">/</span><span class="identifier">mpi</span><span class="special">/</span><span class="identifier">build</span></code> directory.
Just follow the <a class="link" href="getting_started.html#mpi.getting_started.config" title="Configure and Build">configuration</a>
and <a class="link" href="getting_started.html#mpi.getting_started.config.installation" title="Installation">installation</a>
instructions for the C++ Boost.MPI. Once you have installed the Python module,
be sure that the installation location is in your <code class="computeroutput"><span class="identifier">PYTHONPATH</span></code>.
</p>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="mpi.python.quickstart"></a><a class="link" href="python.html#mpi.python.quickstart" title="Quickstart">Quickstart</a>
</h3></div></div></div>
<p>
Getting started with the Boost.MPI Python module is as easy as importing
<code class="computeroutput"><span class="identifier">boost</span><span class="special">.</span><span class="identifier">mpi</span></code>. Our first "Hello, World!"
program is just two lines long:
</p>
<pre class="programlisting"><span class="keyword">import</span> <span class="identifier">boost</span><span class="special">.</span><span class="identifier">mpi</span> <span class="keyword">as</span> <span class="identifier">mpi</span>
<span class="keyword">print</span> <span class="string">"I am process %d of %d."</span> <span class="special">%</span> <span class="special">(</span><span class="identifier">mpi</span><span class="special">.</span><span class="identifier">rank</span><span class="special">,</span> <span class="identifier">mpi</span><span class="special">.</span><span class="identifier">size</span><span class="special">)</span>
</pre>
<p>
Go ahead and run this program with several processes. Be sure to invoke the
<code class="computeroutput"><span class="identifier">python</span></code> interpreter from
<code class="computeroutput"><span class="identifier">mpirun</span></code>, e.g.,
</p>
<pre class="programlisting">mpirun -np 5 python hello_world.py
</pre>
<p>
This will return output such as:
</p>
<pre class="programlisting">I am process 1 of 5.
I am process 3 of 5.
I am process 2 of 5.
I am process 4 of 5.
I am process 0 of 5.
</pre>
<p>
Point-to-point operations in Boost.MPI have nearly the same syntax in Python
as in C++. We can write a simple two-process Python program that prints "Hello,
world!" by transmitting Python strings:
</p>
<pre class="programlisting"><span class="keyword">import</span> <span class="identifier">boost</span><span class="special">.</span><span class="identifier">mpi</span> <span class="keyword">as</span> <span class="identifier">mpi</span>
<span class="keyword">if</span> <span class="identifier">mpi</span><span class="special">.</span><span class="identifier">world</span><span class="special">.</span><span class="identifier">rank</span> <span class="special">==</span> <span class="number">0</span><span class="special">:</span>
<span class="identifier">mpi</span><span class="special">.</span><span class="identifier">world</span><span class="special">.</span><span class="identifier">send</span><span class="special">(</span><span class="number">1</span><span class="special">,</span> <span class="number">0</span><span class="special">,</span> <span class="string">'Hello'</span><span class="special">)</span>
<span class="identifier">msg</span> <span class="special">=</span> <span class="identifier">mpi</span><span class="special">.</span><span class="identifier">world</span><span class="special">.</span><span class="identifier">recv</span><span class="special">(</span><span class="number">1</span><span class="special">,</span> <span class="number">1</span><span class="special">)</span>
<span class="keyword">print</span> <span class="identifier">msg</span><span class="special">,</span><span class="string">'!'</span>
<span class="keyword">else</span><span class="special">:</span>
<span class="identifier">msg</span> <span class="special">=</span> <span class="identifier">mpi</span><span class="special">.</span><span class="identifier">world</span><span class="special">.</span><span class="identifier">recv</span><span class="special">(</span><span class="number">0</span><span class="special">,</span> <span class="number">0</span><span class="special">)</span>
<span class="keyword">print</span> <span class="special">(</span><span class="identifier">msg</span> <span class="special">+</span> <span class="string">', '</span><span class="special">),</span>
<span class="identifier">mpi</span><span class="special">.</span><span class="identifier">world</span><span class="special">.</span><span class="identifier">send</span><span class="special">(</span><span class="number">0</span><span class="special">,</span> <span class="number">1</span><span class="special">,</span> <span class="string">'world'</span><span class="special">)</span>
</pre>
<p>
There are only a few notable differences between this Python code and the
example <a class="link" href="tutorial.html#mpi.tutorial.point_to_point" title="Point-to-Point communication">in the C++ tutorial</a>.
First of all, we don't need to write any initialization code in Python: just
loading the <code class="computeroutput"><span class="identifier">boost</span><span class="special">.</span><span class="identifier">mpi</span></code> module makes the appropriate <code class="computeroutput"><span class="identifier">MPI_Init</span></code> and <code class="computeroutput"><span class="identifier">MPI_Finalize</span></code>
calls. Second, we're passing Python objects from one process to another through
MPI. Any Python object that can be pickled can be transmitted; the next section
will describe in more detail how the Boost.MPI Python layer transmits objects.
Finally, when we receive objects with <code class="computeroutput"><span class="identifier">recv</span></code>,
we don't need to specify the type because transmission of Python objects
is polymorphic.
</p>
<p>
When experimenting with Boost.MPI in Python, don't forget that help is always
available via <code class="computeroutput"><span class="identifier">pydoc</span></code>: just
pass the name of the module or module entity on the command line (e.g.,
<code class="computeroutput"><span class="identifier">pydoc</span> <span class="identifier">boost</span><span class="special">.</span><span class="identifier">mpi</span><span class="special">.</span><span class="identifier">communicator</span></code>) to receive complete reference
documentation. When in doubt, try it!
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="mpi.python.user_data"></a><a class="link" href="python.html#mpi.python.user_data" title="Transmitting User-Defined Data">Transmitting User-Defined Data</a>
</h3></div></div></div>
<p>
Boost.MPI can transmit user-defined data in several different ways. Most
importantly, it can transmit arbitrary <a href="http://www.python.org" target="_top">Python</a>
objects by pickling them at the sender and unpickling them at the receiver,
allowing arbitrarily complex Python data structures to interoperate with
MPI.
</p>
<p>
Boost.MPI also supports efficient serialization and transmission of C++ objects
(that have been exposed to Python) through its C++ interface. Any C++ type
that provides (de-)serialization routines that meet the requirements of the
Boost.Serialization library is eligible for this optimization, but the type
must be registered in advance. To register a C++ type, invoke the C++ function
<code class="computeroutput"><a class="link" href="../boost/mpi/python/register_serialized.html" title="Function template register_serialized">register_serialized</a></code>.
If your C++ types come from other Python modules (they probably will!), those
modules will need to link against the <code class="computeroutput"><span class="identifier">boost_mpi</span></code>
and <code class="computeroutput"><span class="identifier">boost_mpi_python</span></code> libraries
as described in the <a class="link" href="getting_started.html#mpi.getting_started.config.installation" title="Installation">installation
section</a>. Note that you do <span class="bold"><strong>not</strong></span> need
to link against the Boost.MPI Python extension module.
</p>
<p>
Finally, Boost.MPI supports separation of the structure of an object from
the data it stores, allowing the two pieces to be transmitted separately.
This "skeleton/content" mechanism, described in more detail in
a later section, is a communication optimization suitable for problems with
fixed data structures whose internal data changes frequently.
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="mpi.python.collectives"></a><a class="link" href="python.html#mpi.python.collectives" title="Collectives">Collectives</a>
</h3></div></div></div>
<p>
Boost.MPI supports all of the MPI collectives (<code class="computeroutput"><span class="identifier">scatter</span></code>,
<code class="computeroutput"><span class="identifier">reduce</span></code>, <code class="computeroutput"><span class="identifier">scan</span></code>,
<code class="computeroutput"><span class="identifier">broadcast</span></code>, etc.) for any
type of data that can be transmitted with the point-to-point communication
operations. For the MPI collectives that require a user-specified operation
(e.g., <code class="computeroutput"><span class="identifier">reduce</span></code> and <code class="computeroutput"><span class="identifier">scan</span></code>), the operation can be an arbitrary
Python function. For instance, one could concatenate strings with <code class="computeroutput"><span class="identifier">all_reduce</span></code>:
</p>
<pre class="programlisting"><span class="identifier">mpi</span><span class="special">.</span><span class="identifier">all_reduce</span><span class="special">(</span><span class="identifier">my_string</span><span class="special">,</span> <span class="keyword">lambda</span> <span class="identifier">x</span><span class="special">,</span><span class="identifier">y</span><span class="special">:</span> <span class="identifier">x</span> <span class="special">+</span> <span class="identifier">y</span><span class="special">)</span>
</pre>
<p>
The following module-level functions implement MPI collectives: all_gather
Gather the values from all processes. all_reduce Combine the results from
all processes. all_to_all Every process sends data to every other process.
broadcast Broadcast data from one process to all other processes. gather
Gather the values from all processes to the root. reduce Combine the results
from all processes to the root. scan Prefix reduction of the values from
all processes. scatter Scatter the values stored at the root to all processes.
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="mpi.python.skeleton_content"></a><a class="link" href="python.html#mpi.python.skeleton_content" title="Skeleton/Content Mechanism">Skeleton/Content Mechanism</a>
</h3></div></div></div>
<p>
Boost.MPI provides a skeleton/content mechanism that allows the transfer
of large data structures to be split into two separate stages, with the skeleton
(or, "shape") of the data structure sent first and the content
(or, "data") of the data structure sent later, potentially several
times, so long as the structure has not changed since the skeleton was transferred.
The skeleton/content mechanism can improve performance when the data structure
is large and its shape is fixed, because while the skeleton requires serialization
(it has an unknown size), the content transfer is fixed-size and can be done
without extra copies.
</p>
<p>
To use the skeleton/content mechanism from Python, you must first register
the type of your data structure with the skeleton/content mechanism <span class="bold"><strong>from C++</strong></span>. The registration function is <code class="computeroutput"><a class="link" href="../boost/mpi/python/regist_1_3_27_7_20_2_1_1_2.html" title="Function template register_skeleton_and_content">register_skeleton_and_content</a></code>
and resides in the <code class="computeroutput"><a class="link" href="reference.html#header.boost.mpi.python_hpp" title="Header &lt;boost/mpi/python.hpp&gt;">&lt;boost/mpi/python.hpp&gt;</a></code>
header.
</p>
<p>
Once you have registered your C++ data structures, you can extract the skeleton
for an instance of that data structure with <code class="computeroutput"><span class="identifier">skeleton</span><span class="special">()</span></code>. The resulting <code class="computeroutput"><span class="identifier">skeleton_proxy</span></code>
can be transmitted via the normal send routine, e.g.,
</p>
<pre class="programlisting"><span class="identifier">mpi</span><span class="special">.</span><span class="identifier">world</span><span class="special">.</span><span class="identifier">send</span><span class="special">(</span><span class="number">1</span><span class="special">,</span> <span class="number">0</span><span class="special">,</span> <span class="identifier">skeleton</span><span class="special">(</span><span class="identifier">my_data_structure</span><span class="special">))</span>
</pre>
<p>
<code class="computeroutput"><span class="identifier">skeleton_proxy</span></code> objects can
be received on the other end via <code class="computeroutput"><span class="identifier">recv</span><span class="special">()</span></code>, which stores a newly-created instance
of your data structure with the same "shape" as the sender in its
<code class="computeroutput"><span class="string">"object"</span></code> attribute:
</p>
<pre class="programlisting"><span class="identifier">shape</span> <span class="special">=</span> <span class="identifier">mpi</span><span class="special">.</span><span class="identifier">world</span><span class="special">.</span><span class="identifier">recv</span><span class="special">(</span><span class="number">0</span><span class="special">,</span> <span class="number">0</span><span class="special">)</span>
<span class="identifier">my_data_structure</span> <span class="special">=</span> <span class="identifier">shape</span><span class="special">.</span><span class="identifier">object</span>
</pre>
<p>
Once the skeleton has been transmitted, the content (accessed via <code class="computeroutput"><span class="identifier">get_content</span></code>) can be transmitted in much
the same way. Note, however, that the receiver also specifies <code class="computeroutput"><span class="identifier">get_content</span><span class="special">(</span><span class="identifier">my_data_structure</span><span class="special">)</span></code>
in its call to receive:
</p>
<pre class="programlisting"><span class="keyword">if</span> <span class="identifier">mpi</span><span class="special">.</span><span class="identifier">rank</span> <span class="special">==</span> <span class="number">0</span><span class="special">:</span>
<span class="identifier">mpi</span><span class="special">.</span><span class="identifier">world</span><span class="special">.</span><span class="identifier">send</span><span class="special">(</span><span class="number">1</span><span class="special">,</span> <span class="number">0</span><span class="special">,</span> <span class="identifier">get_content</span><span class="special">(</span><span class="identifier">my_data_structure</span><span class="special">))</span>
<span class="keyword">else</span><span class="special">:</span>
<span class="identifier">mpi</span><span class="special">.</span><span class="identifier">world</span><span class="special">.</span><span class="identifier">recv</span><span class="special">(</span><span class="number">0</span><span class="special">,</span> <span class="number">0</span><span class="special">,</span> <span class="identifier">get_content</span><span class="special">(</span><span class="identifier">my_data_structure</span><span class="special">))</span>
</pre>
<p>
Of course, this transmission of content can occur repeatedly, if the values
in the data structure--but not its shape--changes.
</p>
<p>
The skeleton/content mechanism is a structured way to exploit the interaction
between custom-built MPI datatypes and <code class="computeroutput"><span class="identifier">MPI_BOTTOM</span></code>,
to eliminate extra buffer copies.
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="mpi.python.compatibility"></a><a class="link" href="python.html#mpi.python.compatibility" title="C++/Python MPI Compatibility">C++/Python MPI Compatibility</a>
</h3></div></div></div>
<p>
Boost.MPI is a C++ library whose facilities have been exposed to Python via
the Boost.Python library. Since the Boost.MPI Python bindings are build directly
on top of the C++ library, and nearly every feature of C++ library is available
in Python, hybrid C++/Python programs using Boost.MPI can interact, e.g.,
sending a value from Python but receiving that value in C++ (or vice versa).
However, doing so requires some care. Because Python objects are dynamically
typed, Boost.MPI transfers type information along with the serialized form
of the object, so that the object can be received even when its type is not
known. This mechanism differs from its C++ counterpart, where the static
types of transmitted values are always known.
</p>
<p>
The only way to communicate between the C++ and Python views on Boost.MPI
is to traffic entirely in Python objects. For Python, this is the normal
state of affairs, so nothing will change. For C++, this means sending and
receiving values of type <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">python</span><span class="special">::</span><span class="identifier">object</span></code>,
from the <a href="http://www.boost.org/libs/python/doc" target="_top">Boost.Python</a>
library. For instance, say we want to transmit an integer value from Python:
</p>
<pre class="programlisting"><span class="identifier">comm</span><span class="special">.</span><span class="identifier">send</span><span class="special">(</span><span class="number">1</span><span class="special">,</span> <span class="number">0</span><span class="special">,</span> <span class="number">17</span><span class="special">)</span>
</pre>
<p>
In C++, we would receive that value into a Python object and then <code class="computeroutput"><span class="identifier">extract</span></code> an integer value:
</p>
<pre class="programlisting"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">python</span><span class="special">::</span><span class="identifier">object</span> <span class="identifier">value</span><span class="special">;</span>
<span class="identifier">comm</span><span class="special">.</span><span class="identifier">recv</span><span class="special">(</span><span class="number">0</span><span class="special">,</span> <span class="number">0</span><span class="special">,</span> <span class="identifier">value</span><span class="special">);</span>
<span class="keyword">int</span> <span class="identifier">int_value</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">python</span><span class="special">::</span><span class="identifier">extract</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;(</span><span class="identifier">value</span><span class="special">);</span>
</pre>
<p>
In the future, Boost.MPI will be extended to allow improved interoperability
with the C++ Boost.MPI and the C MPI bindings.
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="mpi.python.reference"></a><a class="link" href="python.html#mpi.python.reference" title="Reference">Reference</a>
</h3></div></div></div>
<p>
The Boost.MPI Python module, <code class="computeroutput"><span class="identifier">boost</span><span class="special">.</span><span class="identifier">mpi</span></code>, has
its own <a href="../boost.mpi.html" target="_top">reference documentation</a>, which
is also available using <code class="computeroutput"><span class="identifier">pydoc</span></code>
(from the command line) or <code class="computeroutput"><span class="identifier">help</span><span class="special">(</span><span class="identifier">boost</span><span class="special">.</span><span class="identifier">mpi</span><span class="special">)</span></code>
(from the Python interpreter).
</p>
</div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright © 2005-2007 Douglas Gregor,
Matthias Troyer, Trustees of Indiana University<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at &lt;ulink url="http://www.boost.org/LICENSE_1_0.txt"&gt;
http://www.boost.org/LICENSE_1_0.txt &lt;/ulink&gt;)
</p>
</div></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="../boost/mpi/timer.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../mpi.html"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="design.html"><img src="../../../doc/src/images/next.png" alt="Next"></a>
</div>
</body>
</html>

561
doc/html/mpi/reference.html Normal file
View File

@@ -0,0 +1,561 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Reference</title>
<link rel="stylesheet" href="../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
<link rel="home" href="../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset">
<link rel="up" href="../mpi.html" title="Chapter 26. Boost.MPI">
<link rel="prev" href="c_mapping.html" title="Mapping from C MPI to Boost.MPI">
<link rel="next" href="../boost/mpi/allocator.html" title="Class template allocator">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table cellpadding="2" width="100%"><tr>
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../boost.png"></td>
<td align="center"><a href="../../../index.html">Home</a></td>
<td align="center"><a href="../../../libs/libraries.htm">Libraries</a></td>
<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td>
<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
<td align="center"><a href="../../../more/index.htm">More</a></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="c_mapping.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../mpi.html"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../boost/mpi/allocator.html"><img src="../../../doc/src/images/next.png" alt="Next"></a>
</div>
<div class="section">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="mpi.reference"></a>Reference</h2></div></div></div>
<div class="toc"><dl class="toc">
<dt><span class="section"><a href="reference.html#header.boost.mpi_hpp">Header &lt;boost/mpi.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="reference.html#header.boost.mpi.allocator_hpp">Header &lt;boost/mpi/allocator.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="reference.html#header.boost.mpi.cartesian_communicator_hpp">Header &lt;boost/mpi/cartesian_communicator.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="reference.html#header.boost.mpi.collectives_hpp">Header &lt;boost/mpi/collectives.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="reference.html#header.boost.mpi.collectives_fwd_hpp">Header &lt;boost/mpi/collectives_fwd.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="reference.html#header.boost.mpi.communicator_hpp">Header &lt;boost/mpi/communicator.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="reference.html#header.boost.mpi.config_hpp">Header &lt;boost/mpi/config.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="reference.html#header.boost.mpi.datatype_hpp">Header &lt;boost/mpi/datatype.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="reference.html#header.boost.mpi.datatype_fwd_hpp">Header &lt;boost/mpi/datatype_fwd.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="reference.html#header.boost.mpi.environment_hpp">Header &lt;boost/mpi/environment.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="reference.html#header.boost.mpi.exception_hpp">Header &lt;boost/mpi/exception.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="reference.html#header.boost.mpi.graph_communicator_hpp">Header &lt;boost/mpi/graph_communicator.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="reference.html#header.boost.mpi.group_hpp">Header &lt;boost/mpi/group.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="reference.html#header.boost.mpi.inplace_hpp">Header &lt;boost/mpi/inplace.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="reference.html#header.boost.mpi.intercommunicator_hpp">Header &lt;boost/mpi/intercommunicator.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="reference.html#header.boost.mpi.nonblocking_hpp">Header &lt;boost/mpi/nonblocking.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="reference.html#header.boost.mpi.operations_hpp">Header &lt;boost/mpi/operations.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="reference.html#header.boost.mpi.packed_iarchive_hpp">Header &lt;boost/mpi/packed_iarchive.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="reference.html#header.boost.mpi.packed_oarchive_hpp">Header &lt;boost/mpi/packed_oarchive.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="reference.html#header.boost.mpi.python_hpp">Header &lt;boost/mpi/python.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="reference.html#header.boost.mpi.request_hpp">Header &lt;boost/mpi/request.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="reference.html#header.boost.mpi.skeleton_and_content_hpp">Header &lt;boost/mpi/skeleton_and_content.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="reference.html#header.boost.mpi.skeleton_and_content_fwd_hpp">Header &lt;boost/mpi/skeleton_and_content_fwd.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="reference.html#header.boost.mpi.status_hpp">Header &lt;boost/mpi/status.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="reference.html#header.boost.mpi.timer_hpp">Header &lt;boost/mpi/timer.hpp&gt;</a></span></dt>
</dl></div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.mpi_hpp"></a>Header &lt;<a href="../../../boost/mpi.hpp" target="_top">boost/mpi.hpp</a>&gt;</h3></div></div></div>
<p>This file is a top-level convenience header that includes all of the Boost.MPI library headers. Users concerned about compile time may wish to include only specific headers from the Boost.MPI library. </p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.mpi.allocator_hpp"></a>Header &lt;<a href="../../../boost/mpi/allocator.hpp" target="_top">boost/mpi/allocator.hpp</a>&gt;</h3></div></div></div>
<p>This header provides an STL-compliant allocator that uses the MPI-2 memory allocation facilities. </p>
<pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="keyword">namespace</span> <span class="identifier">mpi</span> <span class="special">{</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">class</span> <a class="link" href="../boost/mpi/allocator.html" title="Class template allocator">allocator</a><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="special">&gt;</span> <span class="keyword">class</span> <a class="link" href="../boost/mpi/allocator_1_3_27_7_2_2_1_2.html" title="Class allocator&lt;void&gt;">allocator</a><span class="special">&lt;</span><span class="keyword">void</span><span class="special">&gt;</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T1<span class="special">,</span> <span class="keyword">typename</span> T2<span class="special">&gt;</span>
<span class="keyword">bool</span> <a class="link" href="../boost/mpi/operator__1_3_27_7_2_2_1_3.html" title="Function template operator=="><span class="keyword">operator</span><span class="special">==</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/allocator.html" title="Class template allocator">allocator</a><span class="special">&lt;</span> <span class="identifier">T1</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <a class="link" href="../boost/mpi/allocator.html" title="Class template allocator">allocator</a><span class="special">&lt;</span> <span class="identifier">T2</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T1<span class="special">,</span> <span class="keyword">typename</span> T2<span class="special">&gt;</span>
<span class="keyword">bool</span> <a class="link" href="../boost/mpi/operator__1_3_27_7_2_2_1_4.html" title="Function template operator!="><span class="keyword">operator</span><span class="special">!=</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/allocator.html" title="Class template allocator">allocator</a><span class="special">&lt;</span> <span class="identifier">T1</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <a class="link" href="../boost/mpi/allocator.html" title="Class template allocator">allocator</a><span class="special">&lt;</span> <span class="identifier">T2</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="special">}</span>
<span class="special">}</span></pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.mpi.cartesian_communicator_hpp"></a>Header &lt;<a href="../../../boost/mpi/cartesian_communicator.hpp" target="_top">boost/mpi/cartesian_communicator.hpp</a>&gt;</h3></div></div></div>
<p>This header defines facilities to support MPI communicators with cartesian topologies. If known at compiled time, the dimension of the implied grid can be statically enforced, through the templatized communicator class. Otherwise, a non template, dynamic, base class is provided. </p>
<pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="keyword">namespace</span> <span class="identifier">mpi</span> <span class="special">{</span>
<span class="keyword">class</span> <a class="link" href="../boost/mpi/cartesian_communicator.html" title="Class cartesian_communicator">cartesian_communicator</a><span class="special">;</span>
<span class="keyword">struct</span> <a class="link" href="../boost/mpi/cartesian_dimension.html" title="Struct cartesian_dimension">cartesian_dimension</a><span class="special">;</span>
<span class="keyword">class</span> <a class="link" href="../boost/mpi/cartesian_topology.html" title="Class cartesian_topology">cartesian_topology</a><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="special">&gt;</span> <span class="keyword">struct</span> <a class="link" href="../boost/mpi/is_mpi_da_1_3_27_7_3_2_1_4.html" title="Struct is_mpi_datatype&lt;cartesian_dimension&gt;">is_mpi_datatype</a><span class="special">&lt;</span><span class="identifier">cartesian_dimension</span><span class="special">&gt;</span><span class="special">;</span>
<span class="comment">// Test if the dimensions values are identical. </span>
<span class="keyword">bool</span> <a name="boost.mpi.operator=_1_3_27_7_3_2_1_5"></a><span class="keyword">operator</span><span class="special">==</span><span class="special">(</span><a class="link" href="../boost/mpi/cartesian_dimension.html" title="Struct cartesian_dimension">cartesian_dimension</a> <span class="keyword">const</span> <span class="special">&amp;</span> d1<span class="special">,</span>
<a class="link" href="../boost/mpi/cartesian_dimension.html" title="Struct cartesian_dimension">cartesian_dimension</a> <span class="keyword">const</span> <span class="special">&amp;</span> d2<span class="special">)</span><span class="special">;</span>
<span class="comment">// Test if the dimension values are different. </span>
<span class="keyword">bool</span> <a name="boost.mpi.operator!_1_3_27_7_3_2_1_6"></a><span class="keyword">operator</span><span class="special">!=</span><span class="special">(</span><a class="link" href="../boost/mpi/cartesian_dimension.html" title="Struct cartesian_dimension">cartesian_dimension</a> <span class="keyword">const</span> <span class="special">&amp;</span> d1<span class="special">,</span>
<a class="link" href="../boost/mpi/cartesian_dimension.html" title="Struct cartesian_dimension">cartesian_dimension</a> <span class="keyword">const</span> <span class="special">&amp;</span> d2<span class="special">)</span><span class="special">;</span>
<span class="comment">// Pretty printing of a cartesian dimension (size, periodic) </span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">ostream</span> <span class="special">&amp;</span>
<a name="boost.mpi.operator_1_3_27_7_3_2_1_7"></a><span class="keyword">operator</span><span class="special">&lt;&lt;</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">ostream</span> <span class="special">&amp;</span> out<span class="special">,</span> <a class="link" href="../boost/mpi/cartesian_dimension.html" title="Struct cartesian_dimension">cartesian_dimension</a> <span class="keyword">const</span> <span class="special">&amp;</span> d<span class="special">)</span><span class="special">;</span>
<span class="keyword">bool</span> <a name="boost.mpi.operator=_1_3_27_7_3_2_1_8"></a><span class="keyword">operator</span><span class="special">==</span><span class="special">(</span><a class="link" href="../boost/mpi/cartesian_topology.html" title="Class cartesian_topology">cartesian_topology</a> <span class="keyword">const</span> <span class="special">&amp;</span> t1<span class="special">,</span>
<a class="link" href="../boost/mpi/cartesian_topology.html" title="Class cartesian_topology">cartesian_topology</a> <span class="keyword">const</span> <span class="special">&amp;</span> t2<span class="special">)</span><span class="special">;</span>
<span class="keyword">bool</span> <a name="boost.mpi.operator!_1_3_27_7_3_2_1_9"></a><span class="keyword">operator</span><span class="special">!=</span><span class="special">(</span><a class="link" href="../boost/mpi/cartesian_topology.html" title="Class cartesian_topology">cartesian_topology</a> <span class="keyword">const</span> <span class="special">&amp;</span> t1<span class="special">,</span>
<a class="link" href="../boost/mpi/cartesian_topology.html" title="Class cartesian_topology">cartesian_topology</a> <span class="keyword">const</span> <span class="special">&amp;</span> t2<span class="special">)</span><span class="special">;</span>
<span class="comment">// Pretty printing of a cartesian topology. </span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">ostream</span> <span class="special">&amp;</span>
<a name="boost.mpi.operator_1_3_27_7_3_2_1_10"></a><span class="keyword">operator</span><span class="special">&lt;&lt;</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">ostream</span> <span class="special">&amp;</span> out<span class="special">,</span> <a class="link" href="../boost/mpi/cartesian_topology.html" title="Class cartesian_topology">cartesian_topology</a> <span class="keyword">const</span> <span class="special">&amp;</span> t<span class="special">)</span><span class="special">;</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="keyword">int</span> <span class="special">&gt;</span> <span class="special">&amp;</span> <a class="link" href="../boost/mpi/cartesian_dimensions.html" title="Function cartesian_dimensions"><span class="identifier">cartesian_dimensions</span></a><span class="special">(</span><span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="keyword">int</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="special">}</span>
<span class="special">}</span></pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.mpi.collectives_hpp"></a>Header &lt;<a href="../../../boost/mpi/collectives.hpp" target="_top">boost/mpi/collectives.hpp</a>&gt;</h3></div></div></div>
<p>This header contains MPI collective operations, which implement various parallel algorithms that require the coordination of all processes within a communicator. The header <code class="computeroutput">collectives_fwd.hpp</code> provides forward declarations for each of these operations. To include only specific collective algorithms, use the headers <code class="computeroutput">boost/mpi/collectives/algorithm_name.hpp</code>. </p>
<pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="keyword">namespace</span> <span class="identifier">mpi</span> <span class="special">{</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/all_gather.html" title="Function all_gather"><span class="identifier">all_gather</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">void</span> <a class="link" href="../boost/mpi/all_gather.html" title="Function all_gather"><span class="identifier">all_gather</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/all_gather.html" title="Function all_gather"><span class="identifier">all_gather</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/all_gather.html" title="Function all_gather"><span class="identifier">all_gather</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> Op<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/all_reduce.html" title="Function all_reduce"><span class="identifier">all_reduce</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="identifier">Op</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> Op<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/all_reduce.html" title="Function all_reduce"><span class="identifier">all_reduce</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">Op</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> Op<span class="special">&gt;</span>
<span class="identifier">T</span> <a class="link" href="../boost/mpi/all_reduce.html" title="Function all_reduce"><span class="identifier">all_reduce</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">Op</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> Op<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/all_reduce.html" title="Function all_reduce"><span class="identifier">all_reduce</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <a class="link" href="../boost/mpi/inplace_t.html" title="Struct template inplace_t">inplace_t</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">*</span> <span class="special">&gt;</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">Op</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> Op<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/all_reduce.html" title="Function all_reduce"><span class="identifier">all_reduce</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <a class="link" href="../boost/mpi/inplace_t.html" title="Struct template inplace_t">inplace_t</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span><span class="special">,</span> <span class="identifier">Op</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/all_to_all.html" title="Function all_to_all"><span class="identifier">all_to_all</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">void</span> <a class="link" href="../boost/mpi/all_to_all.html" title="Function all_to_all"><span class="identifier">all_to_all</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/all_to_all.html" title="Function all_to_all"><span class="identifier">all_to_all</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/all_to_all.html" title="Function all_to_all"><span class="identifier">all_to_all</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">void</span> <a class="link" href="../boost/mpi/broadcast.html" title="Function broadcast"><span class="identifier">broadcast</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">void</span> <a class="link" href="../boost/mpi/broadcast.html" title="Function broadcast"><span class="identifier">broadcast</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/broadcast.html" title="Function broadcast"><span class="identifier">broadcast</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <a class="link" href="../boost/mpi/skeleton_proxy.html" title="Struct template skeleton_proxy">skeleton_proxy</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/broadcast.html" title="Function broadcast"><span class="identifier">broadcast</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <a class="link" href="../boost/mpi/skeleton_proxy.html" title="Struct template skeleton_proxy">skeleton_proxy</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/gather.html" title="Function gather"><span class="identifier">gather</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/gather.html" title="Function gather"><span class="identifier">gather</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">void</span> <a class="link" href="../boost/mpi/gather.html" title="Function gather"><span class="identifier">gather</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/gather.html" title="Function gather"><span class="identifier">gather</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span>
<span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/gather.html" title="Function gather"><span class="identifier">gather</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/gather.html" title="Function gather"><span class="identifier">gather</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/gatherv.html" title="Function gatherv"><span class="identifier">gatherv</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span>
<span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="keyword">int</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="keyword">int</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span>
<span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/gatherv.html" title="Function gatherv"><span class="identifier">gatherv</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span>
<span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="keyword">int</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="keyword">int</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span>
<span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/gatherv.html" title="Function gatherv"><span class="identifier">gatherv</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/gatherv.html" title="Function gatherv"><span class="identifier">gatherv</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/gatherv.html" title="Function gatherv"><span class="identifier">gatherv</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span>
<span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="keyword">int</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/gatherv.html" title="Function gatherv"><span class="identifier">gatherv</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span>
<span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="keyword">int</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/scatter.html" title="Function scatter"><span class="identifier">scatter</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/scatter.html" title="Function scatter"><span class="identifier">scatter</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">void</span> <a class="link" href="../boost/mpi/scatter.html" title="Function scatter"><span class="identifier">scatter</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/scatter.html" title="Function scatter"><span class="identifier">scatter</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span>
<span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/scatter.html" title="Function scatter"><span class="identifier">scatter</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">void</span> <a class="link" href="../boost/mpi/scatter.html" title="Function scatter"><span class="identifier">scatter</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/scatterv.html" title="Function scatterv"><span class="identifier">scatterv</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span>
<span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="keyword">int</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="keyword">int</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span>
<span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/scatterv.html" title="Function scatterv"><span class="identifier">scatterv</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span>
<span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="keyword">int</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="keyword">int</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span>
<span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">void</span> <a class="link" href="../boost/mpi/scatterv.html" title="Function scatterv"><span class="identifier">scatterv</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/scatterv.html" title="Function scatterv"><span class="identifier">scatterv</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span>
<span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="keyword">int</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/scatterv.html" title="Function scatterv"><span class="identifier">scatterv</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span>
<span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special">&lt;</span> <span class="keyword">int</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> Op<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/reduce.html" title="Function reduce"><span class="identifier">reduce</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">Op</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> Op<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/reduce.html" title="Function reduce"><span class="identifier">reduce</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">Op</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> Op<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/reduce.html" title="Function reduce"><span class="identifier">reduce</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="identifier">Op</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> Op<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/reduce.html" title="Function reduce"><span class="identifier">reduce</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">Op</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> Op<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/scan.html" title="Function scan"><span class="identifier">scan</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">Op</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> Op<span class="special">&gt;</span>
<span class="identifier">T</span> <a class="link" href="../boost/mpi/scan.html" title="Function scan"><span class="identifier">scan</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">Op</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> Op<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/scan.html" title="Function scan"><span class="identifier">scan</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">T</span> <span class="special">*</span><span class="special">,</span> <span class="identifier">Op</span><span class="special">)</span><span class="special">;</span>
<span class="special">}</span>
<span class="special">}</span></pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.mpi.collectives_fwd_hpp"></a>Header &lt;<a href="../../../boost/mpi/collectives_fwd.hpp" target="_top">boost/mpi/collectives_fwd.hpp</a>&gt;</h3></div></div></div>
<p>This header provides forward declarations for all of the collective operations contained in the header <code class="computeroutput">collectives.hpp</code>. </p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.mpi.communicator_hpp"></a>Header &lt;<a href="../../../boost/mpi/communicator.hpp" target="_top">boost/mpi/communicator.hpp</a>&gt;</h3></div></div></div>
<p>This header defines the <code class="computeroutput">communicator</code> class, which is the basis of all communication within Boost.MPI, and provides point-to-point communication operations. </p>
<pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="keyword">namespace</span> <span class="identifier">mpi</span> <span class="special">{</span>
<span class="keyword">class</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a><span class="special">;</span>
<span class="keyword">enum</span> <a class="link" href="../boost/mpi/comm_create_kind.html" title="Type comm_create_kind">comm_create_kind</a><span class="special">;</span>
<span class="keyword">const</span> <span class="keyword">int</span> <a class="link" href="../boost/mpi/any_source.html" title="Global any_source">any_source</a><span class="special">;</span> <span class="comment">// A constant representing "any process.". </span>
<span class="keyword">const</span> <span class="keyword">int</span> <a class="link" href="../boost/mpi/any_tag.html" title="Global any_tag">any_tag</a><span class="special">;</span> <span class="comment">// A constant representing "any tag.". </span>
<span class="identifier">BOOST_MPI_DECL</span> <span class="keyword">bool</span> <a class="link" href="../boost/mpi/operator__1_3_27_7_6_2_1_5.html" title="Function operator=="><span class="keyword">operator</span><span class="special">==</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">bool</span> <a class="link" href="../boost/mpi/operator__1_3_27_7_6_2_1_6.html" title="Function operator!="><span class="keyword">operator</span><span class="special">!=</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <a class="link" href="../boost/mpi/communicator.html" title="Class communicator">communicator</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="special">}</span>
<span class="special">}</span></pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.mpi.config_hpp"></a>Header &lt;<a href="../../../boost/mpi/config.hpp" target="_top">boost/mpi/config.hpp</a>&gt;</h3></div></div></div>
<p>This header provides MPI configuration details that expose the capabilities of the underlying MPI implementation, and provides auto-linking support on Windows. </p>
<pre class="synopsis">
<a class="link" href="../MPICH_IGNORE_CXX_SEEK.html" title="Macro MPICH_IGNORE_CXX_SEEK">MPICH_IGNORE_CXX_SEEK</a>
<a class="link" href="../OMPI_SKIP_MPICXX.html" title="Macro OMPI_SKIP_MPICXX">OMPI_SKIP_MPICXX</a>
<a class="link" href="../BOOST_MPI_HOMOGENEOUS.html" title="Macro BOOST_MPI_HOMOGENEOUS">BOOST_MPI_HOMOGENEOUS</a>
<a class="link" href="../BOOST_MPI_VERSION.html" title="Macro BOOST_MPI_VERSION">BOOST_MPI_VERSION</a>
<a class="link" href="../BOOST_MPI_SUBVERSION.html" title="Macro BOOST_MPI_SUBVERSION">BOOST_MPI_SUBVERSION</a>
<a class="link" href="../BOOST_MPI_HAS_1_3_27_7_7_7.html" title="Macro BOOST_MPI_HAS_MEMORY_ALLOCATION">BOOST_MPI_HAS_MEMORY_ALLOCATION</a>
<a class="link" href="../BOOST_MPI_HAS_1_3_27_7_7_8.html" title="Macro BOOST_MPI_HAS_NOARG_INITIALIZATION">BOOST_MPI_HAS_NOARG_INITIALIZATION</a>
<a class="link" href="../BOOST_MPI_CAL_1_3_27_7_7_9.html" title="Macro BOOST_MPI_CALLING_CONVENTION">BOOST_MPI_CALLING_CONVENTION</a>
<a class="link" href="../BOOST_MPI_BC_1_3_27_7_7_10.html" title="Macro BOOST_MPI_BCAST_BOTTOM_WORKS_FINE">BOOST_MPI_BCAST_BOTTOM_WORKS_FINE</a>
<a class="link" href="../BOOST_MPI_DECL.html" title="Macro BOOST_MPI_DECL">BOOST_MPI_DECL</a></pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.mpi.datatype_hpp"></a>Header &lt;<a href="../../../boost/mpi/datatype.hpp" target="_top">boost/mpi/datatype.hpp</a>&gt;</h3></div></div></div>
<p>This header provides the mapping from C++ types to MPI data types. </p>
<pre class="synopsis">
<a class="link" href="../BOOST_IS_MPI_DATATYPE.html" title="Macro BOOST_IS_MPI_DATATYPE">BOOST_IS_MPI_DATATYPE</a>(T)</pre>
<pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="keyword">namespace</span> <span class="identifier">mpi</span> <span class="special">{</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">struct</span> <a class="link" href="../boost/mpi/is_mpi_builtin_datatype.html" title="Struct template is_mpi_builtin_datatype">is_mpi_builtin_datatype</a><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">struct</span> <a class="link" href="../boost/mpi/is_mpi_byte_datatype.html" title="Struct template is_mpi_byte_datatype">is_mpi_byte_datatype</a><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">struct</span> <a class="link" href="../boost/mpi/is_mpi_complex_datatype.html" title="Struct template is_mpi_complex_datatype">is_mpi_complex_datatype</a><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">struct</span> <a class="link" href="../boost/mpi/is_mpi_datatype.html" title="Struct template is_mpi_datatype">is_mpi_datatype</a><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">struct</span> <a class="link" href="../boost/mpi/is_mpi_fl_1_3_27_7_8_2_1_5.html" title="Struct template is_mpi_floating_point_datatype">is_mpi_floating_point_datatype</a><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">struct</span> <a class="link" href="../boost/mpi/is_mpi_integer_datatype.html" title="Struct template is_mpi_integer_datatype">is_mpi_integer_datatype</a><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">struct</span> <a class="link" href="../boost/mpi/is_mpi_logical_datatype.html" title="Struct template is_mpi_logical_datatype">is_mpi_logical_datatype</a><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="identifier">MPI_Datatype</span> <a class="link" href="../boost/mpi/get_mpi_d_1_3_27_7_8_2_1_8.html" title="Function template get_mpi_datatype"><span class="identifier">get_mpi_datatype</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">T</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="special">}</span>
<span class="special">}</span></pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.mpi.datatype_fwd_hpp"></a>Header &lt;<a href="../../../boost/mpi/datatype_fwd.hpp" target="_top">boost/mpi/datatype_fwd.hpp</a>&gt;</h3></div></div></div>
<p>This header provides forward declarations for the contents of the header <code class="computeroutput">datatype.hpp</code>. It is expected to be used primarily by user-defined C++ classes that need to specialize <code class="computeroutput">is_mpi_datatype</code>. </p>
<pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="keyword">namespace</span> <span class="identifier">mpi</span> <span class="special">{</span>
<span class="keyword">struct</span> <a class="link" href="../boost/mpi/packed.html" title="Struct packed">packed</a><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="identifier">MPI_Datatype</span> <a name="boost.mpi.get_mpi_d_1_3_27_7_9_2_1_2"></a><span class="identifier">get_mpi_datatype</span><span class="special">(</span><span class="special">)</span><span class="special">;</span>
<span class="special">}</span>
<span class="special">}</span></pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.mpi.environment_hpp"></a>Header &lt;<a href="../../../boost/mpi/environment.hpp" target="_top">boost/mpi/environment.hpp</a>&gt;</h3></div></div></div>
<p>This header provides the <code class="computeroutput">environment</code> class, which provides routines to initialize, finalization, and query the status of the Boost MPI environment. </p>
<pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="keyword">namespace</span> <span class="identifier">mpi</span> <span class="special">{</span>
<span class="keyword">class</span> <a class="link" href="../boost/mpi/environment.html" title="Class environment">environment</a><span class="special">;</span>
<span class="keyword">namespace</span> <span class="identifier">threading</span> <span class="special">{</span>
<span class="keyword">enum</span> <a class="link" href="../boost/mpi/threading/level.html" title="Type level">level</a><span class="special">;</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">ostream</span> <span class="special">&amp;</span> <a class="link" href="../boost/mpi/threading/operat_1_3_27_7_10_2_1_2_2.html" title="Function operator&lt;&lt;"><span class="keyword">operator</span><span class="special">&lt;&lt;</span></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">ostream</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">level</span><span class="special">)</span><span class="special">;</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">istream</span> <span class="special">&amp;</span> <a class="link" href="../boost/mpi/threading/operat_1_3_27_7_10_2_1_2_3.html" title="Function operator&gt;&gt;"><span class="keyword">operator</span><span class="special">&gt;&gt;</span></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">istream</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">level</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="special">}</span>
<span class="special">}</span>
<span class="special">}</span></pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.mpi.exception_hpp"></a>Header &lt;<a href="../../../boost/mpi/exception.hpp" target="_top">boost/mpi/exception.hpp</a>&gt;</h3></div></div></div>
<p>This header provides exception classes that report MPI errors to the user and macros that translate MPI error codes into Boost.MPI exceptions. </p>
<pre class="synopsis">
<a class="link" href="../BOOST_MPI_CHECK_RESULT.html" title="Macro BOOST_MPI_CHECK_RESULT">BOOST_MPI_CHECK_RESULT</a>(MPIFunc, Args)</pre>
<pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="keyword">namespace</span> <span class="identifier">mpi</span> <span class="special">{</span>
<span class="keyword">class</span> <a class="link" href="../boost/mpi/exception.html" title="Class exception">exception</a><span class="special">;</span>
<span class="special">}</span>
<span class="special">}</span></pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.mpi.graph_communicator_hpp"></a>Header &lt;<a href="../../../boost/mpi/graph_communicator.hpp" target="_top">boost/mpi/graph_communicator.hpp</a>&gt;</h3></div></div></div>
<p>This header defines facilities to support MPI communicators with graph topologies, using the graph interface defined by the Boost Graph Library. One can construct a communicator whose topology is described by any graph meeting the requirements of the Boost Graph Library's graph concepts. Likewise, any communicator that has a graph topology can be viewed as a graph by the Boost Graph Library, permitting one to use the BGL's graph algorithms on the process topology. </p>
<pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="special">&gt;</span> <span class="keyword">struct</span> <a class="link" href="../boost/graph_trai_1_3_27_7_12_2_1.html" title="Struct graph_traits&lt;mpi::graph_communicator&gt;">graph_traits</a><span class="special">&lt;</span><span class="identifier">mpi</span><span class="special">::</span><span class="identifier">graph_communicator</span><span class="special">&gt;</span><span class="special">;</span>
<span class="keyword">namespace</span> <span class="identifier">mpi</span> <span class="special">{</span>
<span class="keyword">class</span> <a class="link" href="../boost/mpi/graph_communicator.html" title="Class graph_communicator">graph_communicator</a><span class="special">;</span>
<span class="comment">// Returns the source vertex from an edge in the graph topology of a communicator. </span>
<span class="keyword">int</span> <a name="boost.mpi.source"></a><span class="identifier">source</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">pair</span><span class="special">&lt;</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span> <span class="special">&gt;</span> <span class="special">&amp;</span> edge<span class="special">,</span> <span class="keyword">const</span> <a class="link" href="../boost/mpi/graph_communicator.html" title="Class graph_communicator">graph_communicator</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="comment">// Returns the target vertex from an edge in the graph topology of a communicator. </span>
<span class="keyword">int</span> <a name="boost.mpi.target"></a><span class="identifier">target</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">pair</span><span class="special">&lt;</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span> <span class="special">&gt;</span> <span class="special">&amp;</span> edge<span class="special">,</span> <span class="keyword">const</span> <a class="link" href="../boost/mpi/graph_communicator.html" title="Class graph_communicator">graph_communicator</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="comment">// Returns an iterator range containing all of the edges outgoing from the given vertex in a graph topology of a communicator. </span>
<span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <a name="boost.mpi.out_edges"></a><span class="identifier">out_edges</span><span class="special">(</span><span class="keyword">int</span> vertex<span class="special">,</span> <span class="keyword">const</span> <a class="link" href="../boost/mpi/graph_communicator.html" title="Class graph_communicator">graph_communicator</a> <span class="special">&amp;</span> comm<span class="special">)</span><span class="special">;</span>
<span class="comment">// Returns the out-degree of a vertex in the graph topology of a communicator. </span>
<span class="keyword">int</span> <a name="boost.mpi.out_degree"></a><span class="identifier">out_degree</span><span class="special">(</span><span class="keyword">int</span> vertex<span class="special">,</span> <span class="keyword">const</span> <a class="link" href="../boost/mpi/graph_communicator.html" title="Class graph_communicator">graph_communicator</a> <span class="special">&amp;</span> comm<span class="special">)</span><span class="special">;</span>
<span class="comment">// Returns an iterator range containing all of the neighbors of the given vertex in the communicator's graph topology. </span>
<span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <a name="boost.mpi.adjacent_vertices"></a><span class="identifier">adjacent_vertices</span><span class="special">(</span><span class="keyword">int</span> vertex<span class="special">,</span> <span class="keyword">const</span> <a class="link" href="../boost/mpi/graph_communicator.html" title="Class graph_communicator">graph_communicator</a> <span class="special">&amp;</span> comm<span class="special">)</span><span class="special">;</span>
<span class="comment">// Returns an iterator range that contains all of the vertices with the communicator's graph topology, i.e., all of the process ranks in the communicator. </span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">pair</span><span class="special">&lt;</span> <span class="identifier">counting_iterator</span><span class="special">&lt;</span> <span class="keyword">int</span> <span class="special">&gt;</span><span class="special">,</span> <span class="identifier">counting_iterator</span><span class="special">&lt;</span> <span class="keyword">int</span> <span class="special">&gt;</span> <span class="special">&gt;</span>
<a name="boost.mpi.vertices"></a><span class="identifier">vertices</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/graph_communicator.html" title="Class graph_communicator">graph_communicator</a> <span class="special">&amp;</span> comm<span class="special">)</span><span class="special">;</span>
<span class="comment">// Returns the number of vertices within the graph topology of the communicator, i.e., the number of processes in the communicator. </span>
<span class="keyword">int</span> <a name="boost.mpi.num_vertices"></a><span class="identifier">num_vertices</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/graph_communicator.html" title="Class graph_communicator">graph_communicator</a> <span class="special">&amp;</span> comm<span class="special">)</span><span class="special">;</span>
<span class="comment">// Returns an iterator range that contains all of the edges with the communicator's graph topology. </span>
<span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <a name="boost.mpi.edges"></a><span class="identifier">edges</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/graph_communicator.html" title="Class graph_communicator">graph_communicator</a> <span class="special">&amp;</span> comm<span class="special">)</span><span class="special">;</span>
<span class="comment">// Returns the number of edges in the communicator's graph topology. </span>
<span class="keyword">int</span> <a name="boost.mpi.num_edges"></a><span class="identifier">num_edges</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/graph_communicator.html" title="Class graph_communicator">graph_communicator</a> <span class="special">&amp;</span> comm<span class="special">)</span><span class="special">;</span>
<span class="identifier">identity_property_map</span> <a class="link" href="../boost/mpi/get_1_3_27_7_12_2_2_11.html" title="Function get"><span class="identifier">get</span></a><span class="special">(</span><span class="identifier">vertex_index_t</span><span class="special">,</span> <span class="keyword">const</span> <a class="link" href="../boost/mpi/graph_communicator.html" title="Class graph_communicator">graph_communicator</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">int</span> <a class="link" href="../boost/mpi/get_1_3_27_7_12_2_2_12.html" title="Function get"><span class="identifier">get</span></a><span class="special">(</span><span class="identifier">vertex_index_t</span><span class="special">,</span> <span class="keyword">const</span> <a class="link" href="../boost/mpi/graph_communicator.html" title="Class graph_communicator">graph_communicator</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
<span class="special">}</span>
<span class="special">}</span></pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.mpi.group_hpp"></a>Header &lt;<a href="../../../boost/mpi/group.hpp" target="_top">boost/mpi/group.hpp</a>&gt;</h3></div></div></div>
<p>This header defines the <code class="computeroutput">group</code> class, which allows one to manipulate and query groups of processes. </p>
<pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="keyword">namespace</span> <span class="identifier">mpi</span> <span class="special">{</span>
<span class="keyword">class</span> <a class="link" href="../boost/mpi/group.html" title="Class group">group</a><span class="special">;</span>
<span class="identifier">BOOST_MPI_DECL</span> <span class="keyword">bool</span> <a class="link" href="../boost/mpi/operator_1_3_27_7_13_2_1_2.html" title="Function operator=="><span class="keyword">operator</span><span class="special">==</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/group.html" title="Class group">group</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <a class="link" href="../boost/mpi/group.html" title="Class group">group</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">bool</span> <a class="link" href="../boost/mpi/operator_1_3_27_7_13_2_1_3.html" title="Function operator!="><span class="keyword">operator</span><span class="special">!=</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/group.html" title="Class group">group</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <a class="link" href="../boost/mpi/group.html" title="Class group">group</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="identifier">BOOST_MPI_DECL</span> <a class="link" href="../boost/mpi/group.html" title="Class group">group</a> <a class="link" href="../boost/mpi/operator_1_3_27_7_13_2_1_4.html" title="Function operator|"><span class="keyword">operator</span><span class="special">|</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/group.html" title="Class group">group</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <a class="link" href="../boost/mpi/group.html" title="Class group">group</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="identifier">BOOST_MPI_DECL</span> <a class="link" href="../boost/mpi/group.html" title="Class group">group</a> <a class="link" href="../boost/mpi/operator_.html" title="Function operator&amp;"><span class="keyword">operator</span><span class="special">&amp;</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/group.html" title="Class group">group</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <a class="link" href="../boost/mpi/group.html" title="Class group">group</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="identifier">BOOST_MPI_DECL</span> <a class="link" href="../boost/mpi/group.html" title="Class group">group</a> <a class="link" href="../boost/mpi/operator-.html" title="Function operator-"><span class="keyword">operator</span><span class="special">-</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="../boost/mpi/group.html" title="Class group">group</a> <span class="special">&amp;</span><span class="special">,</span> <span class="keyword">const</span> <a class="link" href="../boost/mpi/group.html" title="Class group">group</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="special">}</span>
<span class="special">}</span></pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.mpi.inplace_hpp"></a>Header &lt;<a href="../../../boost/mpi/inplace.hpp" target="_top">boost/mpi/inplace.hpp</a>&gt;</h3></div></div></div>
<p>This header provides helpers to indicate to MPI collective operation that a buffer can be use both as an input and output. </p>
<pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="keyword">namespace</span> <span class="identifier">mpi</span> <span class="special">{</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">struct</span> <a class="link" href="../boost/mpi/inplace_t.html" title="Struct template inplace_t">inplace_t</a><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">struct</span> <a class="link" href="../boost/mpi/inplace__1_3_27_7_14_2_1_2.html" title="Struct template inplace_t&lt;T *&gt;">inplace_t</a><span class="special">&lt;</span><span class="identifier">T</span> <span class="special">*</span><span class="special">&gt;</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <a class="link" href="../boost/mpi/inplace_t.html" title="Struct template inplace_t">inplace_t</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <a class="link" href="../boost/mpi/inplace.html" title="Function inplace"><span class="identifier">inplace</span></a><span class="special">(</span><span class="identifier">T</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <a class="link" href="../boost/mpi/inplace_t.html" title="Struct template inplace_t">inplace_t</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">*</span> <span class="special">&gt;</span> <a class="link" href="../boost/mpi/inplace.html" title="Function inplace"><span class="identifier">inplace</span></a><span class="special">(</span><span class="identifier">T</span> <span class="special">*</span><span class="special">)</span><span class="special">;</span>
<span class="special">}</span>
<span class="special">}</span></pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.mpi.intercommunicator_hpp"></a>Header &lt;<a href="../../../boost/mpi/intercommunicator.hpp" target="_top">boost/mpi/intercommunicator.hpp</a>&gt;</h3></div></div></div>
<p>This header defines the <code class="computeroutput">intercommunicator</code> class, which permits communication between different process groups. </p>
<pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="keyword">namespace</span> <span class="identifier">mpi</span> <span class="special">{</span>
<span class="keyword">class</span> <a class="link" href="../boost/mpi/intercommunicator.html" title="Class intercommunicator">intercommunicator</a><span class="special">;</span>
<span class="special">}</span>
<span class="special">}</span></pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.mpi.nonblocking_hpp"></a>Header &lt;<a href="../../../boost/mpi/nonblocking.hpp" target="_top">boost/mpi/nonblocking.hpp</a>&gt;</h3></div></div></div>
<p>This header defines operations for completing non-blocking communication requests. </p>
<pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="keyword">namespace</span> <span class="identifier">mpi</span> <span class="special">{</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> <a class="link" href="../ForwardIterator.html" title="Concept ForwardIterator">ForwardIterator</a><span class="special">&gt;</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">pair</span><span class="special">&lt;</span> <a class="link" href="../boost/mpi/status.html" title="Class status">status</a><span class="special">,</span> <span class="identifier">ForwardIterator</span> <span class="special">&gt;</span>
<a class="link" href="../boost/mpi/wait_any.html" title="Function template wait_any"><span class="identifier">wait_any</span></a><span class="special">(</span><span class="identifier">ForwardIterator</span><span class="special">,</span> <span class="identifier">ForwardIterator</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> <a class="link" href="../ForwardIterator.html" title="Concept ForwardIterator">ForwardIterator</a><span class="special">&gt;</span>
<span class="identifier">optional</span><span class="special">&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">pair</span><span class="special">&lt;</span> <a class="link" href="../boost/mpi/status.html" title="Class status">status</a><span class="special">,</span> <span class="identifier">ForwardIterator</span> <span class="special">&gt;</span> <span class="special">&gt;</span>
<a class="link" href="../boost/mpi/test_any.html" title="Function template test_any"><span class="identifier">test_any</span></a><span class="special">(</span><span class="identifier">ForwardIterator</span><span class="special">,</span> <span class="identifier">ForwardIterator</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> <a class="link" href="../ForwardIterator.html" title="Concept ForwardIterator">ForwardIterator</a><span class="special">,</span> <span class="keyword">typename</span> <a class="link" href="../OutputIterator.html" title="Concept OutputIterator">OutputIterator</a><span class="special">&gt;</span>
<span class="identifier">OutputIterator</span>
<a class="link" href="../boost/mpi/wait_all.html" title="Function wait_all"><span class="identifier">wait_all</span></a><span class="special">(</span><span class="identifier">ForwardIterator</span><span class="special">,</span> <span class="identifier">ForwardIterator</span><span class="special">,</span> <span class="identifier">OutputIterator</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> <a class="link" href="../ForwardIterator.html" title="Concept ForwardIterator">ForwardIterator</a><span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/wait_all.html" title="Function wait_all"><span class="identifier">wait_all</span></a><span class="special">(</span><span class="identifier">ForwardIterator</span><span class="special">,</span> <span class="identifier">ForwardIterator</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> <a class="link" href="../ForwardIterator.html" title="Concept ForwardIterator">ForwardIterator</a><span class="special">,</span> <span class="keyword">typename</span> <a class="link" href="../OutputIterator.html" title="Concept OutputIterator">OutputIterator</a><span class="special">&gt;</span>
<span class="identifier">optional</span><span class="special">&lt;</span> <span class="identifier">OutputIterator</span> <span class="special">&gt;</span>
<a class="link" href="../boost/mpi/test_all.html" title="Function test_all"><span class="identifier">test_all</span></a><span class="special">(</span><span class="identifier">ForwardIterator</span><span class="special">,</span> <span class="identifier">ForwardIterator</span><span class="special">,</span> <span class="identifier">OutputIterator</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> <a class="link" href="../ForwardIterator.html" title="Concept ForwardIterator">ForwardIterator</a><span class="special">&gt;</span>
<span class="keyword">bool</span> <a class="link" href="../boost/mpi/test_all.html" title="Function test_all"><span class="identifier">test_all</span></a><span class="special">(</span><span class="identifier">ForwardIterator</span><span class="special">,</span> <span class="identifier">ForwardIterator</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> <a class="link" href="../BidirectionalIterator.html" title="Concept BidirectionalIterator">BidirectionalIterator</a><span class="special">,</span> <span class="keyword">typename</span> <a class="link" href="../OutputIterator.html" title="Concept OutputIterator">OutputIterator</a><span class="special">&gt;</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">pair</span><span class="special">&lt;</span> <span class="identifier">OutputIterator</span><span class="special">,</span> <span class="identifier">BidirectionalIterator</span> <span class="special">&gt;</span>
<a class="link" href="../boost/mpi/wait_some.html" title="Function wait_some"><span class="identifier">wait_some</span></a><span class="special">(</span><span class="identifier">BidirectionalIterator</span><span class="special">,</span> <span class="identifier">BidirectionalIterator</span><span class="special">,</span> <span class="identifier">OutputIterator</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> <a class="link" href="../BidirectionalIterator.html" title="Concept BidirectionalIterator">BidirectionalIterator</a><span class="special">&gt;</span>
<span class="identifier">BidirectionalIterator</span>
<a class="link" href="../boost/mpi/wait_some.html" title="Function wait_some"><span class="identifier">wait_some</span></a><span class="special">(</span><span class="identifier">BidirectionalIterator</span><span class="special">,</span> <span class="identifier">BidirectionalIterator</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> <a class="link" href="../BidirectionalIterator.html" title="Concept BidirectionalIterator">BidirectionalIterator</a><span class="special">,</span> <span class="keyword">typename</span> <a class="link" href="../OutputIterator.html" title="Concept OutputIterator">OutputIterator</a><span class="special">&gt;</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">pair</span><span class="special">&lt;</span> <span class="identifier">OutputIterator</span><span class="special">,</span> <span class="identifier">BidirectionalIterator</span> <span class="special">&gt;</span>
<a class="link" href="../boost/mpi/test_some.html" title="Function test_some"><span class="identifier">test_some</span></a><span class="special">(</span><span class="identifier">BidirectionalIterator</span><span class="special">,</span> <span class="identifier">BidirectionalIterator</span><span class="special">,</span> <span class="identifier">OutputIterator</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> <a class="link" href="../BidirectionalIterator.html" title="Concept BidirectionalIterator">BidirectionalIterator</a><span class="special">&gt;</span>
<span class="identifier">BidirectionalIterator</span>
<a class="link" href="../boost/mpi/test_some.html" title="Function test_some"><span class="identifier">test_some</span></a><span class="special">(</span><span class="identifier">BidirectionalIterator</span><span class="special">,</span> <span class="identifier">BidirectionalIterator</span><span class="special">)</span><span class="special">;</span>
<span class="special">}</span>
<span class="special">}</span></pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.mpi.operations_hpp"></a>Header &lt;<a href="../../../boost/mpi/operations.hpp" target="_top">boost/mpi/operations.hpp</a>&gt;</h3></div></div></div>
<p>This header provides a mapping from function objects to <code class="computeroutput">MPI_Op</code> constants used in MPI collective operations. It also provides several new function object types not present in the standard <code class="computeroutput"></code> &lt;functional&gt; header that have direct mappings to <code class="computeroutput">MPI_Op</code>. </p>
<pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="keyword">namespace</span> <span class="identifier">mpi</span> <span class="special">{</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">struct</span> <a class="link" href="../boost/mpi/bitwise_and.html" title="Struct template bitwise_and">bitwise_and</a><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">struct</span> <a class="link" href="../boost/mpi/bitwise_or.html" title="Struct template bitwise_or">bitwise_or</a><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">struct</span> <a class="link" href="../boost/mpi/bitwise_xor.html" title="Struct template bitwise_xor">bitwise_xor</a><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Op<span class="special">,</span> <span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">struct</span> <a class="link" href="../boost/mpi/is_commutative.html" title="Struct template is_commutative">is_commutative</a><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Op<span class="special">,</span> <span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">struct</span> <a class="link" href="../boost/mpi/is_mpi_op.html" title="Struct template is_mpi_op">is_mpi_op</a><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">struct</span> <a class="link" href="../boost/mpi/logical_xor.html" title="Struct template logical_xor">logical_xor</a><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">struct</span> <a class="link" href="../boost/mpi/maximum.html" title="Struct template maximum">maximum</a><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">struct</span> <a class="link" href="../boost/mpi/minimum.html" title="Struct template minimum">minimum</a><span class="special">;</span>
<span class="special">}</span>
<span class="special">}</span></pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.mpi.packed_iarchive_hpp"></a>Header &lt;<a href="../../../boost/mpi/packed_iarchive.hpp" target="_top">boost/mpi/packed_iarchive.hpp</a>&gt;</h3></div></div></div>
<p>This header provides the facilities for packing Serializable data types into a buffer using <code class="computeroutput">MPI_Pack</code>. The buffers can then be transmitted via MPI and then be unpacked either via the facilities in <code class="computeroutput">packed_oarchive.hpp</code> or <code class="computeroutput">MPI_Unpack</code>. </p>
<pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="keyword">namespace</span> <span class="identifier">mpi</span> <span class="special">{</span>
<span class="keyword">class</span> <a class="link" href="../boost/mpi/packed_iarchive.html" title="Class packed_iarchive">packed_iarchive</a><span class="special">;</span>
<span class="keyword">typedef</span> <span class="identifier">packed_iprimitive</span> <a name="boost.mpi.iprimitive"></a><span class="identifier">iprimitive</span><span class="special">;</span>
<span class="special">}</span>
<span class="special">}</span></pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.mpi.packed_oarchive_hpp"></a>Header &lt;<a href="../../../boost/mpi/packed_oarchive.hpp" target="_top">boost/mpi/packed_oarchive.hpp</a>&gt;</h3></div></div></div>
<p>This header provides the facilities for unpacking Serializable data types from a buffer using <code class="computeroutput">MPI_Unpack</code>. The buffers are typically received via MPI and have been packed either by via the facilities in <code class="computeroutput">packed_iarchive.hpp</code> or <code class="computeroutput">MPI_Pack</code>. </p>
<pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="keyword">namespace</span> <span class="identifier">mpi</span> <span class="special">{</span>
<span class="keyword">class</span> <a class="link" href="../boost/mpi/packed_oarchive.html" title="Class packed_oarchive">packed_oarchive</a><span class="special">;</span>
<span class="keyword">typedef</span> <span class="identifier">packed_oprimitive</span> <a name="boost.mpi.oprimitive"></a><span class="identifier">oprimitive</span><span class="special">;</span>
<span class="special">}</span>
<span class="special">}</span></pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.mpi.python_hpp"></a>Header &lt;<a href="../../../boost/mpi/python.hpp" target="_top">boost/mpi/python.hpp</a>&gt;</h3></div></div></div>
<p>This header interacts with the Python bindings for Boost.MPI. The routines in this header can be used to register user-defined and library-defined data types with Boost.MPI for efficient (de-)serialization and separate transmission of skeletons and content. </p>
<pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="keyword">namespace</span> <span class="identifier">mpi</span> <span class="special">{</span>
<span class="keyword">namespace</span> <span class="identifier">python</span> <span class="special">{</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/python/register_serialized.html" title="Function template register_serialized"><span class="identifier">register_serialized</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">T</span> <span class="special">&amp;</span> <span class="special">=</span> <span class="identifier">T</span><span class="special">(</span><span class="special">)</span><span class="special">,</span> <span class="identifier">PyTypeObject</span> <span class="special">*</span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span>
<span class="keyword">void</span> <a class="link" href="../boost/mpi/python/regist_1_3_27_7_20_2_1_1_2.html" title="Function template register_skeleton_and_content"><span class="identifier">register_skeleton_and_content</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">T</span> <span class="special">&amp;</span> <span class="special">=</span> <span class="identifier">T</span><span class="special">(</span><span class="special">)</span><span class="special">,</span>
<span class="identifier">PyTypeObject</span> <span class="special">*</span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span><span class="special">;</span>
<span class="special">}</span>
<span class="special">}</span>
<span class="special">}</span></pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.mpi.request_hpp"></a>Header &lt;<a href="../../../boost/mpi/request.hpp" target="_top">boost/mpi/request.hpp</a>&gt;</h3></div></div></div>
<p>This header defines the class <code class="computeroutput">request</code>, which contains a request for non-blocking communication. </p>
<pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="keyword">namespace</span> <span class="identifier">mpi</span> <span class="special">{</span>
<span class="keyword">class</span> <a class="link" href="../boost/mpi/request.html" title="Class request">request</a><span class="special">;</span>
<span class="special">}</span>
<span class="special">}</span></pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.mpi.skeleton_and_content_hpp"></a>Header &lt;<a href="../../../boost/mpi/skeleton_and_content.hpp" target="_top">boost/mpi/skeleton_and_content.hpp</a>&gt;</h3></div></div></div>
<p>This header provides facilities that allow the structure of data types (called the "skeleton") to be transmitted and received separately from the content stored in those data types. These facilities are useful when the data in a stable data structure (e.g., a mesh or a graph) will need to be transmitted repeatedly. In this case, transmitting the skeleton only once saves both communication effort (it need not be sent again) and local computation (serialization need only be performed once for the content). </p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.mpi.skeleton_and_content_fwd_hpp"></a>Header &lt;<a href="../../../boost/mpi/skeleton_and_content_fwd.hpp" target="_top">boost/mpi/skeleton_and_content_fwd.hpp</a>&gt;</h3></div></div></div>
<p>This header contains all of the forward declarations required to use transmit skeletons of data structures and the content of data structures separately. To actually transmit skeletons or content, include the header <code class="computeroutput">boost/mpi/skeleton_and_content.hpp</code>. </p>
<pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="keyword">namespace</span> <span class="identifier">mpi</span> <span class="special">{</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">struct</span> <a class="link" href="../boost/mpi/skeleton_proxy.html" title="Struct template skeleton_proxy">skeleton_proxy</a><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">const</span> <a class="link" href="../boost/mpi/skeleton_proxy.html" title="Struct template skeleton_proxy">skeleton_proxy</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <a name="boost.mpi.skeleton"></a><span class="identifier">skeleton</span><span class="special">(</span><span class="identifier">T</span> <span class="special">&amp;</span> x<span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> <span class="keyword">const</span> <span class="identifier">content</span> <a name="boost.mpi.get_content"></a><span class="identifier">get_content</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">T</span> <span class="special">&amp;</span> x<span class="special">)</span><span class="special">;</span>
<span class="special">}</span>
<span class="special">}</span></pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.mpi.status_hpp"></a>Header &lt;<a href="../../../boost/mpi/status.hpp" target="_top">boost/mpi/status.hpp</a>&gt;</h3></div></div></div>
<p>This header defines the class <code class="computeroutput">status</code>, which reports on the results of point-to-point communication. </p>
<pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="keyword">namespace</span> <span class="identifier">mpi</span> <span class="special">{</span>
<span class="keyword">class</span> <a class="link" href="../boost/mpi/status.html" title="Class status">status</a><span class="special">;</span>
<span class="special">}</span>
<span class="special">}</span></pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.mpi.timer_hpp"></a>Header &lt;<a href="../../../boost/mpi/timer.hpp" target="_top">boost/mpi/timer.hpp</a>&gt;</h3></div></div></div>
<p>This header provides the <code class="computeroutput">timer</code> class, which provides access to the MPI timers. </p>
<pre class="synopsis"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="keyword">namespace</span> <span class="identifier">mpi</span> <span class="special">{</span>
<span class="keyword">class</span> <a class="link" href="../boost/mpi/timer.html" title="Class timer">timer</a><span class="special">;</span>
<span class="special">}</span>
<span class="special">}</span></pre>
</div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright © 2005-2007 Douglas Gregor,
Matthias Troyer, Trustees of Indiana University<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at &lt;ulink url="http://www.boost.org/LICENSE_1_0.txt"&gt;
http://www.boost.org/LICENSE_1_0.txt &lt;/ulink&gt;)
</p>
</div></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="c_mapping.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../mpi.html"><img src="../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../boost/mpi/allocator.html"><img src="../../../doc/src/images/next.png" alt="Next"></a>
</div>
</body>
</html>

1200
doc/html/mpi/tutorial.html Normal file

File diff suppressed because it is too large Load Diff