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92 lines
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92 lines
4.5 KiB
HTML
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<!-- This manual is for FFTW
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(version 3.3.10, 10 December 2020).
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Copyright (C) 2003 Matteo Frigo.
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Copyright (C) 2003 Massachusetts Institute of Technology.
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Permission is granted to make and distribute verbatim copies of this
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manual provided the copyright notice and this permission notice are
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preserved on all copies.
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Permission is granted to copy and distribute modified versions of this
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manual under the conditions for verbatim copying, provided that the
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entire resulting derived work is distributed under the terms of a
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permission notice identical to this one.
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Permission is granted to copy and distribute translations of this manual
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into another language, under the above conditions for modified versions,
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except that this permission notice may be stated in a translation
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approved by the Free Software Foundation. -->
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<title>FFTW MPI Transposes (FFTW 3.3.10)</title>
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<meta name="description" content="FFTW MPI Transposes (FFTW 3.3.10)">
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<link href="index.html" rel="start" title="Top">
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<link href="Concept-Index.html" rel="index" title="Concept Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Distributed_002dmemory-FFTW-with-MPI.html" rel="up" title="Distributed-memory FFTW with MPI">
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<link href="Basic-distributed_002dtranspose-interface.html" rel="next" title="Basic distributed-transpose interface">
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<link href="Other-Multi_002ddimensional-Real_002ddata-MPI-Transforms.html" rel="prev" title="Other Multi-dimensional Real-data MPI Transforms">
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</head>
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<body lang="en">
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<span id="FFTW-MPI-Transposes"></span><div class="header">
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<p>
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Next: <a href="FFTW-MPI-Wisdom.html" accesskey="n" rel="next">FFTW MPI Wisdom</a>, Previous: <a href="Other-Multi_002ddimensional-Real_002ddata-MPI-Transforms.html" accesskey="p" rel="prev">Other Multi-dimensional Real-data MPI Transforms</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>
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</div>
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<hr>
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<span id="FFTW-MPI-Transposes-1"></span><h3 class="section">6.7 FFTW MPI Transposes</h3>
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<span id="index-transpose-2"></span>
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<p>The FFTW’s MPI Fourier transforms rely on one or more <em>global
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transposition</em> step for their communications. For example, the
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multidimensional transforms work by transforming along some
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dimensions, then transposing to make the first dimension local and
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transforming that, then transposing back. Because global
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transposition of a block-distributed matrix has many other potential
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uses besides FFTs, FFTW’s transpose routines can be called directly,
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as documented in this section.
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</p>
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<table class="menu" border="0" cellspacing="0">
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<tr><td align="left" valign="top">• <a href="Basic-distributed_002dtranspose-interface.html" accesskey="1">Basic distributed-transpose interface</a></td><td> </td><td align="left" valign="top">
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Advanced-distributed_002dtranspose-interface.html" accesskey="2">Advanced distributed-transpose interface</a></td><td> </td><td align="left" valign="top">
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</td></tr>
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<tr><td align="left" valign="top">• <a href="An-improved-replacement-for-MPI_005fAlltoall.html" accesskey="3">An improved replacement for MPI_Alltoall</a></td><td> </td><td align="left" valign="top">
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</td></tr>
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</table>
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</body>
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</html>
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