[Insight-users] Re: [Insight-developers] question for itk pipeline
expert
Karthik Krishnan
Karthik.Krishnan at kitware.com
Thu Dec 8 10:55:33 EST 2005
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Gaetan Lehmann wrote:
>
> Hi Luis,
>
> Yes, I can go this way, but:
> - If the execution time can be integrated in the filter (we accept to
> have a new attribute in the filter), then it should be implemented in
> a common class of all filters, so the execution time of all filters
> can be measured without having to duplicate code.
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It should be possible to define a macro that can be #defined via CMake
and collects times taken by GenerateData methods of filters via a
TimeProbesCollector. I don't know if a lot of people need this
functionality, but if that's so it should be easy to add. There are
classes for this purpose already. I guess they just need to be hooked
into appropriate places.
regards
karthik
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> - If the execution can't be integrated in the filter (because we
> don't want of another attribute), then I will have to remove/comment
> the corresponding code before submitting the filter, and so measure
> will be hard to reproduce
> - There is really a problem that I can't locate, and which make ITK
> use a significant amount of time. It should be fixed :-)
>
> Gaetan
>
> On Thu, 08 Dec 2005 13:26:39 +0100, Luis Ibanez
> <luis.ibanez at kitware.com> wrote:
>
>>
>> Hi Gaetan,
>>
>>
>> Gaetan Lehmann wrote:
>>
>> > how can I evaluate the performance of the
>> > filters in that situation ?
>>
>>
>>
>> Enjoy the Power of Open Source !
>>
>>
>>
>> Go to the source code of the filter that you
>> want to profile and add a TimeProbe as a member
>> variable.
>>
>> If the filter is not threaded, simply Start the
>> TimeProbe at the beginning of the GenerateData()
>> method, and Stop it at the end of the same method.
>>
>> If the filer is threaded, Start() the TimeProbe in
>> the "BeforeThreadedGenerateData()" method and
>> Stop() the TimeProbe in the "AfterThreadedGenerateData()"
>> method.
>>
>>
>>
>> If you want to force the filters to re-execute,
>> multiple times in order to have better statistics,
>> then you can invoke the "Modified()" method on them
>> before calling "Update()".
>>
>>
>> Add a Get method to the filter in order to gain
>> access to the probe, so when you are done running
>> the filters you can invoke from outside the filter
>> the report of the Time Probe. At that point, pay
>> particular attention at the report on "Number of
>> Starts" and "Number of Stops", since that will
>> tell you how many times the "Generate Data" method
>> was executed.
>>
>>
>> Regards
>>
>>
>>
>> Luis
>>
>>
>> ----------------------
>> Gaetan Lehmann wrote:
>>
>>> Hi Bill,
>>> No, there is no ReleaseDataFlagOn() in the filters used.
>>> I have displayed the progress of all the filters to verify that
>>> they are not reexecuted if they shouldn't, and everything looks
>>> nice (but the timing are still not what they should).
>>> It's a major problem for me: how can I evaluate the performance of
>>> the filters in that situation ?
>>> Gaetan
>>> On Wed, 07 Dec 2005 21:12:55 +0100, Bill Lorensen
>>> <wlorens1 at nycap.rr.com> wrote:
>>>
>>>> Are you using ReleaseDataFlagOn in any of your filters. Perhaps
>>>> something is re-executing.
>>>>
>>>> Bill
>>>>
>>>> At 07:42 AM 12/7/2005, Gaetan Lehmann wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> I'm trying to measure the execution time of a new filter.
>>>>> It's done with
>>>>> http://voxel.jouy.inra.fr/darcs/contrib-itk/regionalExtrema/perf3D.cxx
>>>>>
>>>>> Here are the results I get:
>>>>>
>>>>> [glehmann at marvin build]$ ./perf3D ../ESCells.img
>>>>> #F concave vrmin rmin
>>>>> 0 17.874 2.592 1.74
>>>>> 1 21.022 3.613 2.799
>>>>>
>>>>> There is a problem: rmin is a sequence of filters which include
>>>>> vrmin, and
>>>>> so rmin should take more time than vrmin.
>>>>> Now, if I comment rmin measure and update, I get
>>>>>
>>>>> [glehmann at marvin build]$ ./perf3D ../ESCells.img
>>>>> #F concave vrmin rmin
>>>>> 0 17.578 0 2.614
>>>>> 1 21.276 0 3.722
>>>>>
>>>>> Again, there is something wrong: I should get the same value than
>>>>> before
>>>>> for rmin if vrmin is not updated.
>>>>>
>>>>> I think there is something hidden in the execution of the
>>>>> pipeline, but I
>>>>> can't get what.
>>>>> Can someone look at the code above and tell me what I'm doing wrong ?
>>>>>
>>>>> I'm using ITK 2.4.1, cmake 2.2.2 and gcc 4.0.1
>>>>>
>>>>> Thanks,
>>>>>
>>>>> Gaetan
>>>>>
>>>>> -- Gaëtan Lehmann
>>>>> Biologie du Développement et de la Reproduction
>>>>> INRA de Jouy-en-Josas (France)
>>>>> tel: +33 1 34 65 29 66 fax: 01 34 65 29 09
>>>>> http://voxel.jouy.inra.fr
>>>>> _______________________________________________
>>>>> Insight-developers mailing list
>>>>> Insight-developers at itk.org
>>>>> http://www.itk.org/mailman/listinfo/insight-developers
>>>>
>>>>
>>>>
>>>
>>
>
>
>
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