[Ubuntu Daily PPA] Transitioning to OCCT7, VTK7...

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abdullah
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Re: [Ubuntu Daily PPA] Transitioning to OCCT7, VTK7...

Post by abdullah »

triplus wrote:Latest OCC/OCE should use algorithms that do this in parallel.
Thanks!

Then, if something is to be "improved" today, it is what issue #2750 indicates. Right?
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sgrogan
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Re: [Ubuntu Daily PPA] Transitioning to OCCT7, VTK7...

Post by sgrogan »

abdullah wrote:Then, if something is to be "improved" today, it is what issue #2750 indicates. Right?
I think so.
The PPA is built with OCCT 7.1 w/tbb
Win x64 is built with OCCT 7.1 w/tbb(32 bit is coming)
OSX is built with OCCT 7.1 w/tbb
My understanding is that OCCT has their own multi-threading algorithms and will use tbb if available. My personal testing hasn't shown a case where tbb offers an improvement. I think triplus is our expert, as far as I know he's implemented all we have with the BOA stuff. vejmarie has implemented some multi-threading stuff for .step import, but I think it relies on open/gl and uses your gpu.
It would probably be nice if we could detect tbb support in the "About FreeCAD", although I think it's just about how OCCT was compiled now?
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abdullah
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Re: [Ubuntu Daily PPA] Transitioning to OCCT7, VTK7...

Post by abdullah »

Thanks.
sgrogan wrote: It would probably be nice if we could detect tbb support in the "About FreeCAD", although I think it's just about how OCCT was compiled now?
I guess that at compilation time it should be possible to ldd the detected OCCT library to see if libtbb is present. I do not know any specific macro or similar...
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sgrogan
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Re: [Ubuntu Daily PPA] Transitioning to OCCT7, VTK7...

Post by sgrogan »

abdullah wrote: I guess that at compilation time it should be possible to ldd the detected OCCT library to see if libtbb is present. I do not know any specific macro or similar...
I was thinking Cmake.config but I don't know where to look. VTK might be good too. Where does this happen in the source?
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Re: [Ubuntu Daily PPA] Transitioning to OCCT7, VTK7...

Post by abdullah »

sgrogan wrote:I was thinking Cmake.config but I don't know where to look. VTK might be good too. Where does this happen in the source?
The content is inserted into dialog / copied to clipboard in:
src/Gui/Splashscreen.cpp

FC info comes from (I think you know a lot about this one):
src/Build/Version.h

I thing that what you are searching may be:

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    str << "Python version: " << PY_VERSION << endl;
    str << "Qt version: " << QT_VERSION_STR << endl;
    str << "Coin version: " << COIN_VERSION << endl;
#if defined(HAVE_OCC_VERSION)
    str << "OCC version: "
        << OCC_VERSION_MAJOR << "."
        << OCC_VERSION_MINOR << "."
        << OCC_VERSION_MAINTENANCE
#ifdef OCC_VERSION_DEVELOPMENT
        << "." OCC_VERSION_DEVELOPMENT
#endif
        << endl;
The thing is that I have not found something like OCC_TBB to say whether OCC TBB support was compiled in or not.

For detecting the TBB version of the system:
https://software.intel.com/en-us/node/506137
triplus
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Re: [Ubuntu Daily PPA] Transitioning to OCCT7, VTK7...

Post by triplus »

abdullah wrote:Then, if something is to be "improved" today, it is what issue #2750 indicates. Right?
Yes. Although the scope of enabling this in all places in FreeCAD where boolean operations are used is likely too broad. As it was done for all methods in Part workbench maybe issue #2750 could be closed as resolved.
sgrogan wrote:My understanding is that OCCT has their own multi-threading algorithms and will use tbb if available.
Yes that is correct. At the beginning i remember TBB was needed but that changed later on. Therefore this is the current situation (OCE ATM provides additional OpenMP option):
Intel TBB, optional for several modules.
It is NOT mandatory for activating parallel algorithms in OCCT,
but can be more efficient for this task then built-in OCCT parallelization routines (OSD_Parallel).
https://forum.freecadweb.org/viewtopic. ... 80#p142368

As for what could be done in addition. If you would like to tackle something. In Part workbench from Python console it is possible to use multiple arguments and fuzzy tolerance value can be set for boolean operation. But as for the GUI commands there is for example a Part Cut feature. Currently it doesn't support setting fuzzy tolerance or to be used with multiple arguments. Look at Part BooleanFragments feature Tolerance property for reference. Here is one use case when setting the tolerance value can be used:

https://forum.freecadweb.org/viewtopic. ... 54#p146936

As for multiple arguments. Tool property would need to accept more shapes. And i guess when a compound is provided individual shapes to be provided as a list... In such operations multi threading could be observed after (the same as in the boolean benchmark test). Once that would be done there i guess is a lot of features in FreeCAD using boolean algorithms and the same could be done for them.
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sgrogan
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Re: [Ubuntu Daily PPA] Transitioning to OCCT7, VTK7...

Post by sgrogan »

abdullah wrote: The thing is that I have not found something like OCC_TBB to say whether OCC TBB support was compiled in or not.
Can you check for:

Code: Select all

set (OpenCASCADE_WITH_TBB
in file OpenCASCADEConfig.cmake
You need the OCCT dev files from the PPA. This file is available at FreeCAD compile time.
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abdullah
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Re: [Ubuntu Daily PPA] Transitioning to OCCT7, VTK7...

Post by abdullah »

sgrogan wrote:in file OpenCASCADEConfig.cmake
You need the OCCT dev files from the PPA. This file is available at FreeCAD compile time.
Not sure where that file should be.

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ls /usr/lib/cmake/opencascade/
OpenCASCADEApplicationFrameworkTargets.cmake          OpenCASCADEDataExchangeTargets-release.cmake       OpenCASCADEModelingAlgorithmsTargets.cmake          OpenCASCADEModelingDataTargets-release.cmake
OpenCASCADEApplicationFrameworkTargets-release.cmake  OpenCASCADEFoundationClassesTargets.cmake          OpenCASCADEModelingAlgorithmsTargets-release.cmake  OpenCASCADEVisualizationTargets.cmake
OpenCASCADEDataExchangeTargets.cmake                  OpenCASCADEFoundationClassesTargets-release.cmake  OpenCASCADEModelingDataTargets.cmake                OpenCASCADEVisualizationTargets-release.cmake
I have all dev packages installed:

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ii  libopencascade-data-exchange-7.1.0:amd64       7.1.0-0ppa1~ubuntu16.04.1 amd64        Open CASCADE Technology CAE platform shared library
ii  libopencascade-data-exchange-dev:amd64         7.1.0-0ppa1~ubuntu16.04.1 amd64        Open CASCADE Technology platform library development files
ii  libopencascade-foundation-7.1.0:amd64          7.1.0-0ppa1~ubuntu16.04.1 amd64        Open CASCADE Technology CAE platform shared library
ii  libopencascade-foundation-dev:amd64            7.1.0-0ppa1~ubuntu16.04.1 amd64        Open CASCADE Technology platform library development files
ii  libopencascade-modeling-algorithms-7.1.0:amd64 7.1.0-0ppa1~ubuntu16.04.1 amd64        Open CASCADE Technology CAE platform shared library
ii  libopencascade-modeling-algorithms-dev:amd64   7.1.0-0ppa1~ubuntu16.04.1 amd64        Open CASCADE Technology platform library development files
ii  libopencascade-modeling-data-7.1.0:amd64       7.1.0-0ppa1~ubuntu16.04.1 amd64        Open CASCADE Technology CAE platform shared library
ii  libopencascade-modeling-data-dev:amd64         7.1.0-0ppa1~ubuntu16.04.1 amd64        Open CASCADE Technology platform library development files
ii  libopencascade-ocaf-7.1.0:amd64                7.1.0-0ppa1~ubuntu16.04.1 amd64        Open CASCADE Technology CAE platform shared library
ii  libopencascade-ocaf-dev:amd64                  7.1.0-0ppa1~ubuntu16.04.1 amd64        Open CASCADE Technology platform library development files
ii  libopencascade-visualization-7.1.0:amd64       7.1.0-0ppa1~ubuntu16.04.1 amd64        Open CASCADE Technology CAE platform shared library
ii  libopencascade-visualization-dev:amd64         7.1.0-0ppa1~ubuntu16.04.1 amd64        Open CASCADE Technology platform library development files
The headers in the include directory include conditional compilation with HAVE_TBB macro. One of the cmake files should define this pre-processor with add_definitions(). However, I have grep all the cmake files above search for TBB and none is to be found... :(
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sgrogan
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Re: [Ubuntu Daily PPA] Transitioning to OCCT7, VTK7...

Post by sgrogan »

abdullah wrote: The headers in the include directory include conditional compilation with HAVE_TBB macro. One of the cmake files should define this pre-processor with add_definitions(). However, I have grep all the cmake files above search for TBB and none is to be found... :(
Thanks for checking. It looks like we have a packaging bug. We are splitting the OCC package and the config file isn't specific to any of the sub-packages so we are not picking up the config file. I'm not sure where we should install it from, @NormandC do you have any thoughts?
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NormandC
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Re: [Ubuntu Daily PPA] Transitioning to OCCT7, VTK7...

Post by NormandC »

sgrogan wrote:We are splitting the OCC package and the config file isn't specific to any of the sub-packages so we are not picking up the config file. I'm not sure where we should install it from, @NormandC do you have any thoughts?
At the moment, none whatsoever...

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	-DUSE_TBB:BOOL=on \
is set under override_dh_auto_configure in https://git.launchpad.net/~freecad-main ... bian/rules, I would have thought it would be taken care of.

As OCCT's CMake implementation is completely different from OCE'S I have no point of reference.

Maybe gdo35 has some insight.
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