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Add FFTW 3.3.8 source, and a Linux build
author Chris Cannam
date Tue, 19 Nov 2019 14:52:55 +0000
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+<!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 3.3.8, 24 May 2018).
+
+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 6.3, http://www.gnu.org/software/texinfo/ -->
+<head>
+<title>FFTW 3.3.8: MPI Wisdom Communication</title>
+
+<meta name="description" content="FFTW 3.3.8: MPI Wisdom Communication">
+<meta name="keywords" content="FFTW 3.3.8: MPI Wisdom Communication">
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+<link href="index.html#Top" rel="start" title="Top">
+<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
+<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
+<link href="FFTW-MPI-Reference.html#FFTW-MPI-Reference" rel="up" title="FFTW MPI Reference">
+<link href="FFTW-MPI-Fortran-Interface.html#FFTW-MPI-Fortran-Interface" rel="next" title="FFTW MPI Fortran Interface">
+<link href="MPI-Plan-Creation.html#MPI-Plan-Creation" rel="prev" title="MPI Plan Creation">
+<style type="text/css">
+<!--
+a.summary-letter {text-decoration: none}
+blockquote.indentedblock {margin-right: 0em}
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+</style>
+
+
+</head>
+
+<body lang="en">
+<a name="MPI-Wisdom-Communication"></a>
+<div class="header">
+<p>
+Previous: <a href="MPI-Plan-Creation.html#MPI-Plan-Creation" accesskey="p" rel="prev">MPI Plan Creation</a>, Up: <a href="FFTW-MPI-Reference.html#FFTW-MPI-Reference" accesskey="u" rel="up">FFTW MPI Reference</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
+</div>
+<hr>
+<a name="MPI-Wisdom-Communication-1"></a>
+<h4 class="subsection">6.12.6 MPI Wisdom Communication</h4>
+
+<p>To facilitate synchronizing wisdom among the different MPI processes,
+we provide two functions:
+</p>
+<a name="index-fftw_005fmpi_005fgather_005fwisdom-1"></a>
+<a name="index-fftw_005fmpi_005fbroadcast_005fwisdom-1"></a>
+<div class="example">
+<pre class="example">void fftw_mpi_gather_wisdom(MPI_Comm comm);
+void fftw_mpi_broadcast_wisdom(MPI_Comm comm);
+</pre></div>
+
+<p>The <code>fftw_mpi_gather_wisdom</code> function gathers all wisdom in the
+given communicator <code>comm</code> to the process of rank 0 in the
+communicator: that process obtains the union of all wisdom on all the
+processes.  As a side effect, some other processes will gain
+additional wisdom from other processes, but only process 0 will gain
+the complete union.
+</p>
+<p>The <code>fftw_mpi_broadcast_wisdom</code> does the reverse: it exports
+wisdom from process 0 in <code>comm</code> to all other processes in the
+communicator, replacing any wisdom they currently have.
+</p>
+<p>See <a href="FFTW-MPI-Wisdom.html#FFTW-MPI-Wisdom">FFTW MPI Wisdom</a>.
+</p>
+
+
+
+</body>
+</html>