[vtk-developers] [VTK ARB] RE ARB

Fri Apr 2 13:38:17 EDT 2010

Hi Stephane,

Indeed, this work is a group effort as I tried to acknowledge in my message.
We've been coordinating with Kitware and Sandia, and trying to involve
others as appropriate. (For instance, I will be on sabbatical at ETH, and I
hope to collaborate with the people at Swiss National Supercomputing Centre.
Maybe I could visit your group while I am in Europe.)

One issue creating a "roadmap" is that I do not think we know enough on how
to best support highly multi-core heterogenous machines. There are many
remaining research issues that will require substantial trial and error
before we have working solutions that can be readily available in production
environments.

Best,

Claudio.

On Fri, Apr 2, 2010 at 9:17 AM, Stephane PLOIX <stephane.ploix at edf.fr>wrote:

>
> 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*<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*<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* <jeff.baumes at kitware.com>
> Envoyé par : *vtk-developers-bounces at vtk.org*<vtk-developers-bounces at vtk.org>
>
> 01/04/2010 21:36
>
>   A
> *vtkusers at vtk.org* <vtkusers at vtk.org>, *vtk-developers at vtk.org*<vtk-developers at vtk.org>
> cc
>   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* <http://www.vtk.org/Wiki/VTK/ARB>
>
> Scheduled meetings and meeting notes are located at
> *
> **http://www.vtk.org/Wiki/VTK/ARB/Meetings*<http://www.vtk.org/Wiki/VTK/ARB/Meetings>
>
> Jeff
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