<br>Hi Sean,<br><br><br>It depends on what you want to do...<br><br><br>The methods<br><br> itk::MultiThreader::SetGlobalDefaultNumberOfThreads(#);<br>
itk::MultiThreader::SetGlobalMaximumNumberOfThreads(#)<br><br>Will set the number of threads for EVERYTHING,<br>not just the registration metrics.<br><br><br>Therefore, if you run, for example an AddImageFilter, <br>
the number of threads that this filter uses will be also<br>limited by the number that you set.<br><br><br>If you really want to control only the number of threads<br>used by the registration process, probably the best way<br>
to do it is by calling:<br><br> registrationMethod->SetNumberOfThreads( N );<br><br>This value will be then (internally and automatically)<br>passed to the image metric.<br><br><br><br> Regards,<br><br> <br> Luis<br>
<br><br><br>--------------------------------------------------------------------------------------------------------<br><div class="gmail_quote">On Fri, Aug 27, 2010 at 4:01 PM, Sean Ziegeler <span dir="ltr"><<a href="mailto:sean.ziegeler@nrlssc.navy.mil">sean.ziegeler@nrlssc.navy.mil</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">When building 3.20.0 with ITK_USE_OPTIMIZED_REGISTRATION_METHODS on, I'm trying to figure out the latest recommended method for setting the number of threads for the entire registration process.<br>
<br>
There are a number of examples from the Testing/Code/Review directory, and each does it differently, i.e.,<br>
<br>
1. itkOptImageToImageMetricsTest uses:<br>
itk::MultiThreader::SetGlobalDefaultNumberOfThreads(#);<br>
itk::MultiThreader::SetGlobalMaximumNumberOfThreads(#);<br>
<br>
2. itkOptImageToImageMetricsTest2 uses:<br>
metric->GetThreader()->SetGlobalDefaultNumberOfThreads(#);<br>
metric->GetThreader()->SetGlobalMaximumNumberOfThreads(#);<br>
<br>
3. itkOptMattesMutualInformationImageToImageMetricThreadsTest1 uses:<br>
metric->SetNumberOfThreads(#);<br>
<br>
Is any one better or more recent than the other?<br>
<br>
Thanks,<br>
Sean<br>
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