[vtkusers] Python Bindings & GIL (Blocking issues)

[Christopher Denter]

Can you provide the patch or a link to it?

On 2. Feb, 2010, at 6:15 PM, Lic. José M. Rodriguez Bacallao wrote:

> well, my problems are all from the past, right now I have patched the
> vtk with the patch from DRE and everything work ok!!!
> 
> On 1/22/10, Lic. José M. Rodriguez Bacallao <jmrbcu at gmail.com> wrote:
>> 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
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>>>>>> 
>>>>>> 
>>>>>> --
>>>>>> 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
>> -----------------------------------------------------------------
>> 
> 
> 
> -- 
> 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
> -----------------------------------------------------------------