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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
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--- a/Lib/fftw-3.2.1/doc/html/.svn/text-base/Avoiding-MPI-Deadlocks.html.svn-base	Wed May 04 11:02:59 2016 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
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-
-<h3 class="section">6.9 Avoiding MPI Deadlocks</h3>
-
-<p><a name="index-deadlock-388"></a>
-An MPI program can <em>deadlock</em> if one process is waiting for a
-message from another process that never gets sent.  To avoid deadlocks
-when using FFTW's MPI routines, it is important to know which
-functions are <em>collective</em>: that is, which functions must
-<em>always</em> be called in the <em>same order</em> from <em>every</em>
-process in a given communicator.  (For example, <code>MPI_Barrier</code> is
-the canonical example of a collective function in the MPI standard.) 
-<a name="index-collective-function-389"></a><a name="index-MPI_005fBarrier-390"></a>
-The functions in FFTW that are <em>always</em> collective are: every
-function beginning with `<samp><span class="samp">fftw_mpi_plan</span></samp>', as well as
-<code>fftw_mpi_broadcast_wisdom</code> and <code>fftw_mpi_gather_wisdom</code>. 
-Also, the following functions from the ordinary FFTW interface are
-collective when they are applied to a plan created by an
-`<samp><span class="samp">fftw_mpi_plan</span></samp>' function: <code>fftw_execute</code>,
-<code>fftw_destroy_plan</code>, and <code>fftw_flops</code>. 
-<a name="index-fftw_005fexecute-391"></a><a name="index-fftw_005fdestroy_005fplan-392"></a><a name="index-fftw_005fflops-393"></a>
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