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3 <title>FFTW MPI Transposes - FFTW 3.3.3</title>
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8 <link rel="up" href="Distributed_002dmemory-FFTW-with-MPI.html#Distributed_002dmemory-FFTW-with-MPI" title="Distributed-memory FFTW with MPI">
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9 <link rel="prev" href="Other-Multi_002ddimensional-Real_002ddata-MPI-Transforms.html#Other-Multi_002ddimensional-Real_002ddata-MPI-Transforms" title="Other Multi-dimensional Real-data MPI Transforms">
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10 <link rel="next" href="FFTW-MPI-Wisdom.html#FFTW-MPI-Wisdom" title="FFTW MPI Wisdom">
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11 <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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12 <!--
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13 This manual is for FFTW
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14 (version 3.3.3, 25 November 2012).
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15
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16 Copyright (C) 2003 Matteo Frigo.
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17
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18 Copyright (C) 2003 Massachusetts Institute of Technology.
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19
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20 Permission is granted to make and distribute verbatim copies of
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21 this manual provided the copyright notice and this permission
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22 notice are preserved on all copies.
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23
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24 Permission is granted to copy and distribute modified versions of
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25 this manual under the conditions for verbatim copying, provided
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26 that the entire resulting derived work is distributed under the
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27 terms of a permission notice identical to this one.
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28
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29 Permission is granted to copy and distribute translations of this
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30 manual into another language, under the above conditions for
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31 modified versions, except that this permission notice may be
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32 stated in a translation approved by the Free Software Foundation.
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45 --></style>
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46 </head>
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47 <body>
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48 <div class="node">
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49 <a name="FFTW-MPI-Transposes"></a>
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50 <p>
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51 Next: <a rel="next" accesskey="n" href="FFTW-MPI-Wisdom.html#FFTW-MPI-Wisdom">FFTW MPI Wisdom</a>,
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52 Previous: <a rel="previous" accesskey="p" href="Other-Multi_002ddimensional-Real_002ddata-MPI-Transforms.html#Other-Multi_002ddimensional-Real_002ddata-MPI-Transforms">Other Multi-dimensional Real-data MPI Transforms</a>,
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53 Up: <a rel="up" accesskey="u" href="Distributed_002dmemory-FFTW-with-MPI.html#Distributed_002dmemory-FFTW-with-MPI">Distributed-memory FFTW with MPI</a>
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54 <hr>
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55 </div>
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56
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57 <h3 class="section">6.7 FFTW MPI Transposes</h3>
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58
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59 <p><a name="index-transpose-396"></a>
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60 The FFTW's MPI Fourier transforms rely on one or more <em>global
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61 transposition</em> step for their communications. For example, the
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62 multidimensional transforms work by transforming along some
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63 dimensions, then transposing to make the first dimension local and
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64 transforming that, then transposing back. Because global
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65 transposition of a block-distributed matrix has many other potential
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66 uses besides FFTs, FFTW's transpose routines can be called directly,
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67 as documented in this section.
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68
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69 <ul class="menu">
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70 <li><a accesskey="1" href="Basic-distributed_002dtranspose-interface.html#Basic-distributed_002dtranspose-interface">Basic distributed-transpose interface</a>
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71 <li><a accesskey="2" href="Advanced-distributed_002dtranspose-interface.html#Advanced-distributed_002dtranspose-interface">Advanced distributed-transpose interface</a>
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72 <li><a accesskey="3" href="An-improved-replacement-for-MPI_005fAlltoall.html#An-improved-replacement-for-MPI_005fAlltoall">An improved replacement for MPI_Alltoall</a>
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73 </ul>
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74
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75 </body></html>
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76
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