Mercurial > hg > sv-dependency-builds

annotate src/fftw-3.3.3/doc/html/Installation-and-Supported-Hardware_002fSoftware.html @ 10:37bf6b4a2645

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Add FFTW3
author Chris Cannam
date Wed, 20 Mar 2013 15:35:50 +0000
parents
children
rev   line source
Chris@10 1 <html lang="en">
Chris@10 2 <head>
Chris@10 3 <title>Installation and Supported Hardware/Software - 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="Multi_002dthreaded-FFTW.html#Multi_002dthreaded-FFTW" title="Multi-threaded FFTW">
Chris@10 9 <link rel="prev" href="Multi_002dthreaded-FFTW.html#Multi_002dthreaded-FFTW" title="Multi-threaded FFTW">
Chris@10 10 <link rel="next" href="Usage-of-Multi_002dthreaded-FFTW.html#Usage-of-Multi_002dthreaded-FFTW" title="Usage of Multi-threaded FFTW">
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="Installation-and-Supported-Hardware%2fSoftware"></a>
Chris@10 50 <a name="Installation-and-Supported-Hardware_002fSoftware"></a>
Chris@10 51 <p>
Chris@10 52 Next:&nbsp;<a rel="next" accesskey="n" href="Usage-of-Multi_002dthreaded-FFTW.html#Usage-of-Multi_002dthreaded-FFTW">Usage of Multi-threaded FFTW</a>,
Chris@10 53 Previous:&nbsp;<a rel="previous" accesskey="p" href="Multi_002dthreaded-FFTW.html#Multi_002dthreaded-FFTW">Multi-threaded FFTW</a>,
Chris@10 54 Up:&nbsp;<a rel="up" accesskey="u" href="Multi_002dthreaded-FFTW.html#Multi_002dthreaded-FFTW">Multi-threaded FFTW</a>
Chris@10 55 <hr>
Chris@10 56 </div>
Chris@10 57
Chris@10 58 <h3 class="section">5.1 Installation and Supported Hardware/Software</h3>
Chris@10 59
Chris@10 60 <p>All of the FFTW threads code is located in the <code>threads</code>
Chris@10 61 subdirectory of the FFTW package. On Unix systems, the FFTW threads
Chris@10 62 libraries and header files can be automatically configured, compiled,
Chris@10 63 and installed along with the uniprocessor FFTW libraries simply by
Chris@10 64 including <code>--enable-threads</code> in the flags to the <code>configure</code>
Chris@10 65 script (see <a href="Installation-on-Unix.html#Installation-on-Unix">Installation on Unix</a>), or <code>--enable-openmp</code> to use
Chris@10 66 <a href="http://www.openmp.org">OpenMP</a> threads.
Chris@10 67 <a name="index-configure-329"></a>
Chris@10 68
Chris@10 69 <p><a name="index-portability-330"></a><a name="index-OpenMP-331"></a>The threads routines require your operating system to have some sort
Chris@10 70 of shared-memory threads support. Specifically, the FFTW threads
Chris@10 71 package works with POSIX threads (available on most Unix variants,
Chris@10 72 from GNU/Linux to MacOS X) and Win32 threads. OpenMP threads, which
Chris@10 73 are supported in many common compilers (e.g. gcc) are also supported,
Chris@10 74 and may give better performance on some systems. (OpenMP threads are
Chris@10 75 also useful if you are employing OpenMP in your own code, in order to
Chris@10 76 minimize conflicts between threading models.) If you have a
Chris@10 77 shared-memory machine that uses a different threads API, it should be
Chris@10 78 a simple matter of programming to include support for it; see the file
Chris@10 79 <code>threads/threads.c</code> for more detail.
Chris@10 80
Chris@10 81 <p>You can compile FFTW with <em>both</em> <code>--enable-threads</code> and
Chris@10 82 <code>--enable-openmp</code> at the same time, since they install libraries
Chris@10 83 with different names (&lsquo;<samp><span class="samp">fftw3_threads</span></samp>&rsquo; and &lsquo;<samp><span class="samp">fftw3_omp</span></samp>&rsquo;, as
Chris@10 84 described below). However, your programs may only link to <em>one</em>
Chris@10 85 of these two libraries at a time.
Chris@10 86
Chris@10 87 <p>Ideally, of course, you should also have multiple processors in order to
Chris@10 88 get any benefit from the threaded transforms.
Chris@10 89
Chris@10 90 <!-- -->
Chris@10 91 </body></html>
Chris@10 92