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Current fftw source
author Chris Cannam
date Tue, 18 Oct 2016 13:40:26 +0100
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Chris@42 1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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Chris@42 3 <!-- This manual is for FFTW
Chris@42 4 (version 3.3.5, 30 July 2016).
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Chris@42 6 Copyright (C) 2003 Matteo Frigo.
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Chris@42 8 Copyright (C) 2003 Massachusetts Institute of Technology.
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Chris@42 24 <head>
Chris@42 25 <title>FFTW 3.3.5: FFTW MPI Transposes</title>
Chris@42 26
Chris@42 27 <meta name="description" content="FFTW 3.3.5: FFTW MPI Transposes">
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Chris@42 35 <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
Chris@42 36 <link href="Distributed_002dmemory-FFTW-with-MPI.html#Distributed_002dmemory-FFTW-with-MPI" rel="up" title="Distributed-memory FFTW with MPI">
Chris@42 37 <link href="Basic-distributed_002dtranspose-interface.html#Basic-distributed_002dtranspose-interface" rel="next" title="Basic distributed-transpose interface">
Chris@42 38 <link href="Other-Multi_002ddimensional-Real_002ddata-MPI-Transforms.html#Other-Multi_002ddimensional-Real_002ddata-MPI-Transforms" rel="prev" title="Other Multi-dimensional Real-data MPI Transforms">
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Chris@42 69 </head>
Chris@42 70
Chris@42 71 <body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
Chris@42 72 <a name="FFTW-MPI-Transposes"></a>
Chris@42 73 <div class="header">
Chris@42 74 <p>
Chris@42 75 Next: <a href="FFTW-MPI-Wisdom.html#FFTW-MPI-Wisdom" accesskey="n" rel="next">FFTW MPI Wisdom</a>, Previous: <a href="Other-Multi_002ddimensional-Real_002ddata-MPI-Transforms.html#Other-Multi_002ddimensional-Real_002ddata-MPI-Transforms" accesskey="p" rel="prev">Other Multi-dimensional Real-data MPI Transforms</a>, Up: <a href="Distributed_002dmemory-FFTW-with-MPI.html#Distributed_002dmemory-FFTW-with-MPI" accesskey="u" rel="up">Distributed-memory FFTW with MPI</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>
Chris@42 76 </div>
Chris@42 77 <hr>
Chris@42 78 <a name="FFTW-MPI-Transposes-1"></a>
Chris@42 79 <h3 class="section">6.7 FFTW MPI Transposes</h3>
Chris@42 80 <a name="index-transpose-2"></a>
Chris@42 81
Chris@42 82 <p>The FFTW&rsquo;s MPI Fourier transforms rely on one or more <em>global
Chris@42 83 transposition</em> step for their communications. For example, the
Chris@42 84 multidimensional transforms work by transforming along some
Chris@42 85 dimensions, then transposing to make the first dimension local and
Chris@42 86 transforming that, then transposing back. Because global
Chris@42 87 transposition of a block-distributed matrix has many other potential
Chris@42 88 uses besides FFTs, FFTW&rsquo;s transpose routines can be called directly,
Chris@42 89 as documented in this section.
Chris@42 90 </p>
Chris@42 91 <table class="menu" border="0" cellspacing="0">
Chris@42 92 <tr><td align="left" valign="top">&bull; <a href="Basic-distributed_002dtranspose-interface.html#Basic-distributed_002dtranspose-interface" accesskey="1">Basic distributed-transpose interface</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
Chris@42 93 </td></tr>
Chris@42 94 <tr><td align="left" valign="top">&bull; <a href="Advanced-distributed_002dtranspose-interface.html#Advanced-distributed_002dtranspose-interface" accesskey="2">Advanced distributed-transpose interface</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
Chris@42 95 </td></tr>
Chris@42 96 <tr><td align="left" valign="top">&bull; <a href="An-improved-replacement-for-MPI_005fAlltoall.html#An-improved-replacement-for-MPI_005fAlltoall" accesskey="3">An improved replacement for MPI_Alltoall</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
Chris@42 97 </td></tr>
Chris@42 98 </table>
Chris@42 99
Chris@42 100
Chris@42 101
Chris@42 102
Chris@42 103 </body>
Chris@42 104 </html>