[vtkusers] vtkThreadedController

[Laurence Griffiths]

Cheers for the quick reply Berk,

Actually I think i can achieve the same with pythons Queue and threading
modules. So no big problem.

I have a pipline which does something like:
1. Read unstructured grid
2. take a some slices
3. Do some processing on the slices
4. render. (offscrean, OSMesa)
5. save image to file

rendering on osmesa is slow, so I wanted to gain a small speed on the
rendering stage by rendering & saving multiple slices at once.

The threading would be more of a quick fix before ive implemented something
with mpi

Cheers,
Laurence.






On Fri, Aug 2, 2013 at 4:31 PM, Berk Geveci <berk.geveci at kitware.com> wrote:

> Hi Laurence,
>
> We deprecated vtkThreadedController quite a while ago. It wasn't being
> maintained and until now, we thought it wasn't being used. Are you using it
> in an application? What is your use case?
>
> Best,
> -berk
>
>
>
> On Fri, Aug 2, 2013 at 9:58 AM, Laurence Griffiths <
> lgriffiths.aero at gmail.com> wrote:
>
>> Does anybody know what happened to vtkThreadedController. I cannot find
>> it anywhere in vtk6.0.0.
>>
>>
>> An example seems to hint that its possible to get a vtkThreadedController
>> by using vtkMultiProcessController without MPI:
>>
>> http://vtk.org/gitweb?p=VTK.git;a=blob;f=Examples/ParallelProcessing/Generic/Cxx/TaskParallelismWithPorts.cxx
>>
>> however vtkMultiProcessControler is an abstract class, so i am unable to
>> use it as shown in the exmaple.
>>
>> Another example suggests the same using vtkMPIController without MPI to
>> get a threaded controller:
>>
>> http://vtk.org/gitweb?p=VTK.git;a=blob;f=Examples/ParallelProcessing/Generic/Cxx/TaskParallelism.cxx
>>
>> However for me this doesnt seem to work, I get mpi errors if i try to
>> inialise the MPIController without MPI.
>>
>> Doesnt anyone have any hints on how to make a threadedcontroller work in
>> vtk6.0.0
>>
>> Cheers,
>> Laurence.
>>
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