[vtkusers] Python Bindings & GIL (Blocking issues)

[Lic. José M. Rodriguez Bacallao]

could you send me a code snippet that you used to achieve the load,
because I am trying to load an XA image of 5.5 Mb and my user
interface is freezing?

PS: I am not using a progress bar and I need to keep my user interface
responsive.

On Thu, Jan 21, 2010 at 4:29 PM, Christopher Denter
<dennda at the-space-station.com> wrote:
> Yes.
>
> I just tested it. In my case it is sufficient to sleep 0.001 seconds to keep the UI responsive. I got 433 callbacks, so it is 0.433 seconds slower. I got no problem trading that for a functioning progress bar.
>
> On 21. Jan, 2010, at 10:10 PM, Lic. José M. Rodriguez Bacallao wrote:
>
>> yes, I did the same with the callback to ProgressEvents. If U sleep
>> the thread, the load of the dataset will be (number_of_callback_fired
>> * time_thread_is_sleeping) slower, isn't it?
>>
>> PS: sorry, I will press the <reply all> next time.
>>
>> On 1/21/10, Christopher Denter <dennda at the-space-station.com> wrote:
>>> Hello,
>>>
>>> in my particular case I have been able to work around the problem to some
>>> degree by using callbacks for ProgressEvents (I need those anyway for a
>>> progress bar) and a bad hack.
>>> The bad hack is now that each time the callback is called, I make the thread
>>> sleep for 0.05 seconds so that the main thread has some time to catch up.
>>>
>>> Of course this is not a proper solution but just a bad hack. It helps
>>> animate a progress bar though.
>>>
>>> Jose, please make sure to hit 'Reply All' to also send a mail to the VTK
>>> mailing list.
>>>
>>> HTH,
>>>      Christopher
>>>
>>> On 21. Jan, 2010, at 4:11 PM, Lic. José M. Rodriguez Bacallao wrote:
>>>
>>>> I have the same issue, with vtk and PyQt threads or python threads,
>>>> any suggestions?
>>>>
>>>> On 1/20/10, Christopher Denter <dennda at the-space-station.com> wrote:
>>>>> Hello.
>>>>>
>>>>> In my application I want to load a large dataset in a different thread to
>>>>> keep the UI responsive. However, as soon as the VTK code is executed,
>>>>> only
>>>>> that one thread runs and my UI freezes for the duration of the loading
>>>>> operation. Do the VTK bindings block the python interpreter?
>>>>> VTK_NO_PYTHON_THREADS is disabled. I'm running Python 2.6.4 on OSX 10.6.
>>>>>
>>>>> (To be precise, all the thread does currently - for testing reasons - is
>>>>> create a vtkDICOMImageReader and read a dataset. If I replace all VTK
>>>>> related stuff with a simple time.sleep(10), the UI remains responsive,
>>>>> hence
>>>>> my conclusion.)
>>>>>
>>>>> Thanks,
>>>>>    Christopher
>>>>> _______________________________________________
>>>>> Powered by www.kitware.com
>>>>>
>>>>> Visit other Kitware open-source projects at
>>>>> http://www.kitware.com/opensource/opensource.html
>>>>>
>>>>> Please keep messages on-topic and check the VTK FAQ at:
>>>>> http://www.vtk.org/Wiki/VTK_FAQ
>>>>>
>>>>> Follow this link to subscribe/unsubscribe:
>>>>> http://www.vtk.org/mailman/listinfo/vtkusers
>>>>>
>>>>
>>>>
>>>> --
>>>> Lic. José M. Rodriguez Bacallao
>>>> Centro de Biofisica Medica
>>>> -----------------------------------------------------------------
>>>> Todos somos muy ignorantes, lo que ocurre es que no todos ignoramos lo
>>>> mismo.
>>>>
>>>> Recuerda: El arca de Noe fue construida por aficionados, el titanic
>>>> por profesionales
>>>> -----------------------------------------------------------------
>>>
>>>
>>
>>
>> --
>> Lic. José M. Rodriguez Bacallao
>> Centro de Biofisica Medica
>> -----------------------------------------------------------------
>> Todos somos muy ignorantes, lo que ocurre es que no todos ignoramos lo mismo.
>>
>> Recuerda: El arca de Noe fue construida por aficionados, el titanic
>> por profesionales
>> -----------------------------------------------------------------
>
>



-- 
Lic. José M. Rodriguez Bacallao
Centro de Biofisica Medica
-----------------------------------------------------------------
Todos somos muy ignorantes, lo que ocurre es que no todos ignoramos lo mismo.

Recuerda: El arca de Noe fue construida por aficionados, el titanic
por profesionales
-----------------------------------------------------------------