[vtkusers] Python Bindings & GIL (Blocking issues)

[Lic. José M. Rodriguez Bacallao]

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
-----------------------------------------------------------------