|
Chris@10
|
1 <html lang="en">
|
|
Chris@10
|
2 <head>
|
|
Chris@10
|
3 <title>Linking and Initializing MPI FFTW - FFTW 3.3.3</title>
|
|
Chris@10
|
4 <meta http-equiv="Content-Type" content="text/html">
|
|
Chris@10
|
5 <meta name="description" content="FFTW 3.3.3">
|
|
Chris@10
|
6 <meta name="generator" content="makeinfo 4.13">
|
|
Chris@10
|
7 <link title="Top" rel="start" href="index.html#Top">
|
|
Chris@10
|
8 <link rel="up" href="Distributed_002dmemory-FFTW-with-MPI.html#Distributed_002dmemory-FFTW-with-MPI" title="Distributed-memory FFTW with MPI">
|
|
Chris@10
|
9 <link rel="prev" href="FFTW-MPI-Installation.html#FFTW-MPI-Installation" title="FFTW MPI Installation">
|
|
Chris@10
|
10 <link rel="next" href="2d-MPI-example.html#g_t2d-MPI-example" title="2d MPI example">
|
|
Chris@10
|
11 <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
|
|
Chris@10
|
12 <!--
|
|
Chris@10
|
13 This manual is for FFTW
|
|
Chris@10
|
14 (version 3.3.3, 25 November 2012).
|
|
Chris@10
|
15
|
|
Chris@10
|
16 Copyright (C) 2003 Matteo Frigo.
|
|
Chris@10
|
17
|
|
Chris@10
|
18 Copyright (C) 2003 Massachusetts Institute of Technology.
|
|
Chris@10
|
19
|
|
Chris@10
|
20 Permission is granted to make and distribute verbatim copies of
|
|
Chris@10
|
21 this manual provided the copyright notice and this permission
|
|
Chris@10
|
22 notice are preserved on all copies.
|
|
Chris@10
|
23
|
|
Chris@10
|
24 Permission is granted to copy and distribute modified versions of
|
|
Chris@10
|
25 this manual under the conditions for verbatim copying, provided
|
|
Chris@10
|
26 that the entire resulting derived work is distributed under the
|
|
Chris@10
|
27 terms of a permission notice identical to this one.
|
|
Chris@10
|
28
|
|
Chris@10
|
29 Permission is granted to copy and distribute translations of this
|
|
Chris@10
|
30 manual into another language, under the above conditions for
|
|
Chris@10
|
31 modified versions, except that this permission notice may be
|
|
Chris@10
|
32 stated in a translation approved by the Free Software Foundation.
|
|
Chris@10
|
33 -->
|
|
Chris@10
|
34 <meta http-equiv="Content-Style-Type" content="text/css">
|
|
Chris@10
|
35 <style type="text/css"><!--
|
|
Chris@10
|
36 pre.display { font-family:inherit }
|
|
Chris@10
|
37 pre.format { font-family:inherit }
|
|
Chris@10
|
38 pre.smalldisplay { font-family:inherit; font-size:smaller }
|
|
Chris@10
|
39 pre.smallformat { font-family:inherit; font-size:smaller }
|
|
Chris@10
|
40 pre.smallexample { font-size:smaller }
|
|
Chris@10
|
41 pre.smalllisp { font-size:smaller }
|
|
Chris@10
|
42 span.sc { font-variant:small-caps }
|
|
Chris@10
|
43 span.roman { font-family:serif; font-weight:normal; }
|
|
Chris@10
|
44 span.sansserif { font-family:sans-serif; font-weight:normal; }
|
|
Chris@10
|
45 --></style>
|
|
Chris@10
|
46 </head>
|
|
Chris@10
|
47 <body>
|
|
Chris@10
|
48 <div class="node">
|
|
Chris@10
|
49 <a name="Linking-and-Initializing-MPI-FFTW"></a>
|
|
Chris@10
|
50 <p>
|
|
Chris@10
|
51 Next: <a rel="next" accesskey="n" href="2d-MPI-example.html#g_t2d-MPI-example">2d MPI example</a>,
|
|
Chris@10
|
52 Previous: <a rel="previous" accesskey="p" href="FFTW-MPI-Installation.html#FFTW-MPI-Installation">FFTW MPI Installation</a>,
|
|
Chris@10
|
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>
|
|
Chris@10
|
54 <hr>
|
|
Chris@10
|
55 </div>
|
|
Chris@10
|
56
|
|
Chris@10
|
57 <h3 class="section">6.2 Linking and Initializing MPI FFTW</h3>
|
|
Chris@10
|
58
|
|
Chris@10
|
59 <p>Programs using the MPI FFTW routines should be linked with
|
|
Chris@10
|
60 <code>-lfftw3_mpi -lfftw3 -lm</code> on Unix in double precision,
|
|
Chris@10
|
61 <code>-lfftw3f_mpi -lfftw3f -lm</code> in single precision, and so on
|
|
Chris@10
|
62 (see <a href="Precision.html#Precision">Precision</a>). You will also need to link with whatever library
|
|
Chris@10
|
63 is responsible for MPI on your system; in most MPI implementations,
|
|
Chris@10
|
64 there is a special compiler alias named <code>mpicc</code> to compile and
|
|
Chris@10
|
65 link MPI code.
|
|
Chris@10
|
66 <a name="index-mpicc-351"></a><a name="index-linking-on-Unix-352"></a><a name="index-precision-353"></a>
|
|
Chris@10
|
67
|
|
Chris@10
|
68 <p><a name="index-fftw_005finit_005fthreads-354"></a>Before calling any FFTW routines except possibly
|
|
Chris@10
|
69 <code>fftw_init_threads</code> (see <a href="Combining-MPI-and-Threads.html#Combining-MPI-and-Threads">Combining MPI and Threads</a>), but after calling
|
|
Chris@10
|
70 <code>MPI_Init</code>, you should call the function:
|
|
Chris@10
|
71
|
|
Chris@10
|
72 <pre class="example"> void fftw_mpi_init(void);
|
|
Chris@10
|
73 </pre>
|
|
Chris@10
|
74 <p><a name="index-fftw_005fmpi_005finit-355"></a>
|
|
Chris@10
|
75 If, at the end of your program, you want to get rid of all memory and
|
|
Chris@10
|
76 other resources allocated internally by FFTW, for both the serial and
|
|
Chris@10
|
77 MPI routines, you can call:
|
|
Chris@10
|
78
|
|
Chris@10
|
79 <pre class="example"> void fftw_mpi_cleanup(void);
|
|
Chris@10
|
80 </pre>
|
|
Chris@10
|
81 <p><a name="index-fftw_005fmpi_005fcleanup-356"></a>
|
|
Chris@10
|
82 which is much like the <code>fftw_cleanup()</code> function except that it
|
|
Chris@10
|
83 also gets rid of FFTW's MPI-related data. You must <em>not</em> execute
|
|
Chris@10
|
84 any previously created plans after calling this function.
|
|
Chris@10
|
85
|
|
Chris@10
|
86 <!-- -->
|
|
Chris@10
|
87 </body></html>
|
|
Chris@10
|
88
|
