<div dir="ltr">Hi Sujin,<div><br></div><div>That sounds good. Even if the choice of backend is transparent as far as using vtkSMPTools is concerned, it's very nice to be able to report which backend was configured.</div><div><br></div><div> - David<br><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Feb 9, 2016 at 8:46 AM, Sujin Philip <span dir="ltr"><<a href="mailto:sujin.philip@kitware.com" target="_blank">sujin.philip@kitware.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div><div>Hi Sean,<br><br></div>vtkSMPTools is a framework for implementing multi-threaded algorithms in VTK. It support several backends. The main ones are TBB and OpenMP. There are Kaapi and Simple backends which are no longer supported and will be removed soon. Finally, the default backend is Sequential which is just a single threaded implementation of the framework. After removal of the Kaapi and Simple backend, if you need multithreading support on Clang you would have to use TBB. The Sequential backend will be supported on all platforms.<br><br></div>David,<br><br>I have talked with Berk about this and I will soon make a change to have a compile time macro to check for SMP backend type. I will also finally remove Kaapi and Simple backend as part of this change.<br><br></div>Thanks<span class="HOEnZb"><font color="#888888"><br></font></span></div><span class="HOEnZb"><font color="#888888">Sujin<br><br></font></span></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Feb 9, 2016 at 10:28 AM, Sean McBride <span dir="ltr"><<a href="mailto:sean@rogue-research.com" target="_blank">sean@rogue-research.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span>On Tue, 9 Feb 2016 09:13:48 -0500, Sujin Philip said:<br>
<br>
>Why would you want to continue using vtkMultiThreader when Sequential or<br>
>Simple is used? In fact, now that there is an openmp backend, we should be<br>
>removing simple. It was only there to ease debugging since tbb had very<br>
>complex back-traces. Openmp back-traces are much more readable. Do you want<br>
>the algorithm to be multithreaded even when Sequential is used?<br>
<br>
</span>I don't know the APIs you're discussing, so this comment is coming mostly from ignorance, but: are you talking about requiring OpenMP to build VTK? Clang has only very recently added OpenMP support, and IIRC it's not complete. Also, last I checked, Apple's fork of clang doesn't support it at all.<br>
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Cheers,<br>
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____________________________________________________________<br>
Sean McBride, B. Eng <a href="mailto:sean@rogue-research.com" target="_blank">sean@rogue-research.com</a><br>
Rogue Research <a href="http://www.rogue-research.com" rel="noreferrer" target="_blank">www.rogue-research.com</a><br>
Mac Software Developer Montréal, Québec, Canada<br>
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