[vtk-developers] Shared Memory Parallelism in VTK

[jianwei li]

Hi
   Now,in my proposal,I want use the implemented paralle methods to
implemente the cutting algorithm.But,do you have a guide line for the
implemented paralle methods.
   Thank you
Cheers
  Jianwei

2015-03-17 11:17 GMT+08:00 David Gobbi <david.gobbi at gmail.com>:

> Hi Jianwei,
>
> You wouldn't directly use TBB or Kaapi, because VTK provides an abstract
> SMP interface.  This doxygen page provides a brief synopsis. The "Functor"
> described on the page is a function-like object with the signature "void
> func(vtkIdType first, vtkIdType last)" where vtkIdType is an integer type.
> Basically, the SMP For() function is given a (first,last) range that covers
> the entire data set, and divides it into smaller (first,last) sub-ranges
> that the Functor operates on from within the worker threads.
> http://www.vtk.org/doc/nightly/html/classvtkSMPTools.html
>
> To complete the picture, you can take a look at the Kaapi back end and the
> TBB back end:
>
> https://gitlab.kitware.com/vtk/vtk/blob/master/Common/Core/SMP/Kaapi/vtkSMPToolsInternal.h.in
>
> https://gitlab.kitware.com/vtk/vtk/blob/master/Common/Core/SMP/TBB/vtkSMPToolsInternal.h.in
>
> So to answer your question, the proposal would be to write (and then
> evaluate) an efficient parallel VTK algorithm that uses the abstract
> interface described on the first web page.
>
> Cheers,
>  - David
>
>
> On Mon, Mar 16, 2015 at 7:56 PM, jianwei li <ljianweiyx at gmail.com> wrote:
>
>> So,do I need to write a proposal to implement anyone algorithm using TBB
>> or XKaapi
>>
>> 2015-03-17 3:59 GMT+08:00 Berk Geveci <berk.geveci at kitware.com>:
>>
>>> Maybe a brief Wiki page describing the overall volume splitting and
>>> static thread assignment would be good. We can put a link from the project
>>> page. Beyond that, when/if we pick a student for the project and Google
>>> funds it, we can elaborate.
>>>
>>> -berk
>>>
>>> On Mon, Mar 16, 2015 at 3:17 PM, David Gobbi <david.gobbi at gmail.com>
>>> wrote:
>>>
>>>> On Mon, Mar 16, 2015 at 12:52 PM, Berk Geveci <berk.geveci at kitware.com>
>>>> wrote:
>>>>>
>>>>>
>>>>> David: Is there a reference describing the VTK threaded image
>>>>> algorithm infrastructure or do we just point to the code?
>>>>>
>>>>
>>>> There's no reference for vtkThreadedImageAlgorithm that I'm aware of,
>>>> though I can write something up on the wiki.   Even though the code itself
>>>> isn't very complicated, it would be hard to follow for anyone who isn't
>>>> familiar with a) the streaming pipeline and b) the vtkMultiThreader.
>>>>
>>>>  - David
>>>>
>>>
>>>
>>
>
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