mirror of
https://github.com/tildearrow/furnace.git
synced 2024-11-27 15:03:01 +00:00
108 lines
4.6 KiB
HTML
108 lines
4.6 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
|
<html>
|
|
<!-- This manual is for FFTW
|
|
(version 3.3.10, 10 December 2020).
|
|
|
|
Copyright (C) 2003 Matteo Frigo.
|
|
|
|
Copyright (C) 2003 Massachusetts Institute of Technology.
|
|
|
|
Permission is granted to make and distribute verbatim copies of this
|
|
manual provided the copyright notice and this permission notice are
|
|
preserved on all copies.
|
|
|
|
Permission is granted to copy and distribute modified versions of this
|
|
manual under the conditions for verbatim copying, provided that the
|
|
entire resulting derived work is distributed under the terms of a
|
|
permission notice identical to this one.
|
|
|
|
Permission is granted to copy and distribute translations of this manual
|
|
into another language, under the above conditions for modified versions,
|
|
except that this permission notice may be stated in a translation
|
|
approved by the Free Software Foundation. -->
|
|
<!-- Created by GNU Texinfo 6.7, http://www.gnu.org/software/texinfo/ -->
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
|
<title>Linking and Initializing MPI FFTW (FFTW 3.3.10)</title>
|
|
|
|
<meta name="description" content="Linking and Initializing MPI FFTW (FFTW 3.3.10)">
|
|
<meta name="keywords" content="Linking and Initializing MPI FFTW (FFTW 3.3.10)">
|
|
<meta name="resource-type" content="document">
|
|
<meta name="distribution" content="global">
|
|
<meta name="Generator" content="makeinfo">
|
|
<link href="index.html" rel="start" title="Top">
|
|
<link href="Concept-Index.html" rel="index" title="Concept Index">
|
|
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
|
|
<link href="Distributed_002dmemory-FFTW-with-MPI.html" rel="up" title="Distributed-memory FFTW with MPI">
|
|
<link href="2d-MPI-example.html" rel="next" title="2d MPI example">
|
|
<link href="FFTW-MPI-Installation.html" rel="prev" title="FFTW MPI Installation">
|
|
<style type="text/css">
|
|
<!--
|
|
a.summary-letter {text-decoration: none}
|
|
blockquote.indentedblock {margin-right: 0em}
|
|
div.display {margin-left: 3.2em}
|
|
div.example {margin-left: 3.2em}
|
|
div.lisp {margin-left: 3.2em}
|
|
kbd {font-style: oblique}
|
|
pre.display {font-family: inherit}
|
|
pre.format {font-family: inherit}
|
|
pre.menu-comment {font-family: serif}
|
|
pre.menu-preformatted {font-family: serif}
|
|
span.nolinebreak {white-space: nowrap}
|
|
span.roman {font-family: initial; font-weight: normal}
|
|
span.sansserif {font-family: sans-serif; font-weight: normal}
|
|
ul.no-bullet {list-style: none}
|
|
-->
|
|
</style>
|
|
|
|
|
|
</head>
|
|
|
|
<body lang="en">
|
|
<span id="Linking-and-Initializing-MPI-FFTW"></span><div class="header">
|
|
<p>
|
|
Next: <a href="2d-MPI-example.html" accesskey="n" rel="next">2d MPI example</a>, Previous: <a href="FFTW-MPI-Installation.html" accesskey="p" rel="prev">FFTW MPI Installation</a>, Up: <a href="Distributed_002dmemory-FFTW-with-MPI.html" accesskey="u" rel="up">Distributed-memory FFTW with MPI</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html" title="Index" rel="index">Index</a>]</p>
|
|
</div>
|
|
<hr>
|
|
<span id="Linking-and-Initializing-MPI-FFTW-1"></span><h3 class="section">6.2 Linking and Initializing MPI FFTW</h3>
|
|
|
|
<p>Programs using the MPI FFTW routines should be linked with
|
|
<code>-lfftw3_mpi -lfftw3 -lm</code> on Unix in double precision,
|
|
<code>-lfftw3f_mpi -lfftw3f -lm</code> in single precision, and so on
|
|
(see <a href="Precision.html">Precision</a>). You will also need to link with whatever library
|
|
is responsible for MPI on your system; in most MPI implementations,
|
|
there is a special compiler alias named <code>mpicc</code> to compile and
|
|
link MPI code.
|
|
<span id="index-mpicc-1"></span>
|
|
<span id="index-linking-on-Unix-1"></span>
|
|
<span id="index-precision-5"></span>
|
|
</p>
|
|
|
|
<span id="index-fftw_005finit_005fthreads-1"></span>
|
|
<p>Before calling any FFTW routines except possibly
|
|
<code>fftw_init_threads</code> (see <a href="Combining-MPI-and-Threads.html">Combining MPI and Threads</a>), but after calling
|
|
<code>MPI_Init</code>, you should call the function:
|
|
</p>
|
|
<div class="example">
|
|
<pre class="example">void fftw_mpi_init(void);
|
|
</pre></div>
|
|
<span id="index-fftw_005fmpi_005finit"></span>
|
|
|
|
<p>If, at the end of your program, you want to get rid of all memory and
|
|
other resources allocated internally by FFTW, for both the serial and
|
|
MPI routines, you can call:
|
|
</p>
|
|
<div class="example">
|
|
<pre class="example">void fftw_mpi_cleanup(void);
|
|
</pre></div>
|
|
<span id="index-fftw_005fmpi_005fcleanup"></span>
|
|
|
|
<p>which is much like the <code>fftw_cleanup()</code> function except that it
|
|
also gets rid of FFTW’s MPI-related data. You must <em>not</em> execute
|
|
any previously created plans after calling this function.
|
|
</p>
|
|
|
|
|
|
|
|
</body>
|
|
</html>
|