<br><font size=2 face="sans-serif">Hi ARB,</font>
<br>
<br><font size=2 face="sans-serif">Another topic that could also be of
interest : multi-threading. </font>
<br><font size=2 face="sans-serif">I will not elaborate on the why (multi-cores)
of this question and on the potential unefficiency (memory bound algorithms)
of it, I believe it is a subject on which VTK should have a clear policy
/ roadmap.</font>
<br><font size=2 face="sans-serif">I know this is a huge task, but could
we try to take the first steps :</font>
<br><font size=2 face="sans-serif">*maybe justify why VTK will never be
multi-threaded and be clear about it.</font>
<br><font size=2 face="sans-serif">*If not, I believe the first step is
to make the methods reentrant (including iterators as listed in the topics
for the next arb meeting, removing static variables...)</font>
<br><font size=2 face="sans-serif">*An then in any order, support different
kind of multithreading : </font>
<br><font size=2 face="sans-serif">**inter-algorithm (update several filter
together when there is no dependency in the pipeline),</font>
<br><font size=2 face="sans-serif">**inter-block (when an algorithm loops
over multiple independent blocks, there is potential for multi-threading),</font>
<br><font size=2 face="sans-serif">**intra-algorithm (algorithm-dependent).</font>
<br>
<br><font size=2 face="sans-serif">Some (or all?) of these topics have
already recieved attention and some have partial solutions (vtkMultiThreader...),
but I have not seen any clear roadmap on this subject.</font>
<br>
<br><font size=2 face="sans-serif">Best,</font>
<br><font size=2 face="sans-serif">Stephane<br>
</font>
<br>
<br>
<br>
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<td width=40%><font size=1 face="sans-serif"><b>jeff.baumes@kitware.com</b>
</font>
<br><font size=1 face="sans-serif">Envoyé par : vtk-developers-bounces@vtk.org</font>
<p><font size=1 face="sans-serif">01/04/2010 21:36</font>
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<div align=right><font size=1 face="sans-serif">A</font></div>
<td><font size=1 face="sans-serif">vtkusers@vtk.org, vtk-developers@vtk.org</font>
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<td>
<div align=right><font size=1 face="sans-serif">cc</font></div>
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<td>
<div align=right><font size=1 face="sans-serif">Objet</font></div>
<td><font size=1 face="sans-serif">[vtk-developers] ARB</font></table>
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<br>
<br><tt><font size=2>VTK community,<br>
<br>
I just wanted to take the opportunity to tell you about what has been<br>
happening with the VTK ARB (architecture review board). The ARB was<br>
formed last year to facilitate forward progress in VTK. It is a task<br>
force consisting of researchers around the world that was formed to<br>
work out the details required to make important changes, such as<br>
release schedules and moving to git repository. The ARB wants your<br>
input, and wants to be transparent about its discussions and<br>
decisions. A page describing the ARB is located at<br>
<br>
http://www.vtk.org/Wiki/VTK/ARB<br>
<br>
Scheduled meetings and meeting notes are located at<br>
<br>
http://www.vtk.org/Wiki/VTK/ARB/Meetings<br>
<br>
Jeff<br>
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