[vtk-developers] [VTK ARB] RE ARB

Fri Apr 2 11:17:53 EDT 2010

Hi Claudio,

I had seen at visweek 2009 that you were working on it.
My point is that I believe you are not the only one, and that some kind of 
communication and coordination in the interested community could help. So 
maybe publishing a roadmap could focus contributions where needed. 
Anyway, the article and tutorial with examples will be really usefull, 
thank you!

Best,
Stephane

csilva at sci.utah.edu 
Envoyé par : claudio.t.silva at gmail.com
02/04/2010 16:43

A
stephane.ploix at edf.fr
cc
arb at vtk.org, vtk-developers at vtk.org
Objet
Re: [VTK ARB] RE [vtk-developers] ARB

Hi Stephane,

Although this has not been widely advertised, here at Utah, we have been 
working with Sandia and Kitware on this. The code is already in the main 
VTK repository, but we are lacking a set of examples that show how to best 
use the new functionality. 

For now, I can point you to a preprint (not final) of the technical paper:

Streaming-Enabled Parallel Dataflow Architecture for Multicore Systems, 
Huy T. Vo, Daniel K. Osmari, Brian Summa, Joao L. D. Comba, Valerio 
Pascucci, and Claudio T. Silva, Computer Graphics Forum (Proceedings of 
EuroVis 2010), to appear. 
http://www.sci.utah.edu/~csilva/papers/eurovis2010-notfinal.pdf

Over summer, we (Utah, Sandia, Kitware) plan to write a tutorial with a 
good number of examples. Also, the work has been extended to support 
heterogenous nodes (CPU and GPU), but that work is not ready yet to be 
submitted to the VTK repository.

I am not sure if this completely addresses your concerns, but hopefully it 
is a step in the right direction.

Best regards,

Claudio.

On Fri, Apr 2, 2010 at 7:49 AM, Stephane PLOIX <stephane.ploix at edf.fr> 
wrote:

Hi ARB, 

Another topic that could also be of interest : multi-threading. 
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. 
I know this is a huge task, but could we try to take the first steps : 
*maybe justify why VTK will never be multi-threaded and be clear about it. 

*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...) 
*An then in any order, support different kind of multithreading : 
**inter-algorithm (update several filter together when there is no 
dependency in the pipeline), 
**inter-block (when an algorithm loops over multiple independent blocks, 
there is potential for multi-threading), 
**intra-algorithm (algorithm-dependent). 

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. 

Best, 
Stephane

jeff.baumes at kitware.com 
Envoyé par : vtk-developers-bounces at vtk.org 
01/04/2010 21:36 

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vtkusers at vtk.org, vtk-developers at vtk.org 
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Objet
[vtk-developers] ARB

VTK community,

I just wanted to take the opportunity to tell you about what has been
happening with the VTK ARB (architecture review board). The ARB was
formed last year to facilitate forward progress in VTK. It is a task
force consisting of researchers around the world that was formed to
work out the details required to make important changes, such as
release schedules and moving to git repository. The ARB wants your
input, and wants to be transparent about its discussions and
decisions. A page describing the ARB is located at

http://www.vtk.org/Wiki/VTK/ARB

Scheduled meetings and meeting notes are located at

http://www.vtk.org/Wiki/VTK/ARB/Meetings

Jeff
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