Mercurial > hg > batch-feature-extraction-tool

diff Lib/fftw-3.2.1/doc/html/.svn/text-base/Multi_002dthreaded-FFTW.html.svn-base @ 15:585caf503ef5 tip

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Tidy up for ROLI
author Geogaddi\David <d.m.ronan@qmul.ac.uk>
date Tue, 17 May 2016 18:50:19 +0100
parents 636c989477e7
children
line wrap: on
line diff
--- a/Lib/fftw-3.2.1/doc/html/.svn/text-base/Multi_002dthreaded-FFTW.html.svn-base	Wed May 04 11:02:59 2016 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,90 +0,0 @@
-<html lang="en">
-<head>
-<title>Multi-threaded FFTW - FFTW 3.2.1</title>
-<meta http-equiv="Content-Type" content="text/html">
-<meta name="description" content="FFTW 3.2.1">
-<meta name="generator" content="makeinfo 4.8">
-<link title="Top" rel="start" href="index.html#Top">
-<link rel="prev" href="FFTW-Reference.html#FFTW-Reference" title="FFTW Reference">
-<link rel="next" href="FFTW-on-the-Cell-Processor.html#FFTW-on-the-Cell-Processor" title="FFTW on the Cell Processor">
-<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
-<!--
-This manual is for FFTW
-(version 3.2.1, 5 February 2009).
-
-Copyright (C) 2003 Matteo Frigo.
-
-Copyright (C) 2003 Massachusetts Institute of Technology.
-
-     Permission is granted to make and distribute verbatim copies of
-     this manual provided the copyright notice and this permission
-     notice are preserved on all copies.
-
-     Permission is granted to copy and distribute modified versions of
-     this manual under the conditions for verbatim copying, provided
-     that the entire resulting derived work is distributed under the
-     terms of a permission notice identical to this one.
-
-     Permission is granted to copy and distribute translations of this
-     manual into another language, under the above conditions for
-     modified versions, except that this permission notice may be
-     stated in a translation approved by the Free Software Foundation.
-   -->
-<meta http-equiv="Content-Style-Type" content="text/css">
-<style type="text/css"><!--
-  pre.display { font-family:inherit }
-  pre.format  { font-family:inherit }
-  pre.smalldisplay { font-family:inherit; font-size:smaller }
-  pre.smallformat  { font-family:inherit; font-size:smaller }
-  pre.smallexample { font-size:smaller }
-  pre.smalllisp    { font-size:smaller }
-  span.sc    { font-variant:small-caps }
-  span.roman { font-family:serif; font-weight:normal; } 
-  span.sansserif { font-family:sans-serif; font-weight:normal; } 
---></style>
-</head>
-<body>
-<div class="node">
-<p>
-<a name="Multi-threaded-FFTW"></a>
-<a name="Multi_002dthreaded-FFTW"></a>
-Next:&nbsp;<a rel="next" accesskey="n" href="FFTW-on-the-Cell-Processor.html#FFTW-on-the-Cell-Processor">FFTW on the Cell Processor</a>,
-Previous:&nbsp;<a rel="previous" accesskey="p" href="FFTW-Reference.html#FFTW-Reference">FFTW Reference</a>,
-Up:&nbsp;<a rel="up" accesskey="u" href="index.html#Top">Top</a>
-<hr>
-</div>
-
-<h2 class="chapter">5 Multi-threaded FFTW</h2>
-
-<p><a name="index-parallel-transform-316"></a>In this chapter we document the parallel FFTW routines for
-shared-memory parallel hardware.  These routines, which support
-parallel one- and multi-dimensional transforms of both real and
-complex data, are the easiest way to take advantage of multiple
-processors with FFTW.  They work just like the corresponding
-uniprocessor transform routines, except that you have an extra
-initialization routine to call, and there is a routine to set the
-number of threads to employ.  Any program that uses the uniprocessor
-FFTW can therefore be trivially modified to use the multi-threaded
-FFTW.
-
-   <p>A shared-memory machine is one in which all CPUs can directly access
-the same main memory, and such machines are now common due to the
-ubiquity of multi-core CPUs.  FFTW's multi-threading support allows
-you to utilize these additional CPUs transparently from a single
-program.  However, this does not necessarily translate into
-performance gains&mdash;when multiple threads/CPUs are employed, there is
-an overhead required for synchronization that may outweigh the
-computatational parallelism.  Therefore, you can only benefit from
-threads if your problem is sufficiently large. 
-<a name="index-shared_002dmemory-317"></a><a name="index-threads-318"></a>
-
-<ul class="menu">
-<li><a accesskey="1" href="Installation-and-Supported-Hardware_002fSoftware.html#Installation-and-Supported-Hardware_002fSoftware">Installation and Supported Hardware/Software</a>
-<li><a accesskey="2" href="Usage-of-Multi_002dthreaded-FFTW.html#Usage-of-Multi_002dthreaded-FFTW">Usage of Multi-threaded FFTW</a>
-<li><a accesskey="3" href="How-Many-Threads-to-Use_003f.html#How-Many-Threads-to-Use_003f">How Many Threads to Use?</a>
-<li><a accesskey="4" href="Thread-safety.html#Thread-safety">Thread safety</a>
-</ul>
-
-<!--  -->
-</body></html>
-