Hi, Thanks Simon! I see.
I am writing a CUDA application of which where RTK and ITK will be parts, and I want to know how RTK CUDA cooperates with the CUDA functionality I already have in my application. I have found some behaviors that would be nice to be able to control/change or at least understand the design of: * Context handling. It appears the CUDA context manager keeps track of contexts and also can switch between them, I think I would like to be able to control this on a higher level. I can see situations where multple libraries compete with the control of contexts. * Streams. It would be nice to be able to perform data transfer between CPU/GPU in parallell with computations, but that requires that another stream than the default stream is used, since the default stream is always synchronous. * Memory allocations. When CUDA memory is allocated and deallocated, it implicitly synchronizes all operations on the GPU ( https://docs.nvidia.com/cuda/cuda-c-programming-guide/#implicit-synchronization). It would be good if one could either provide allocators/deallocates for a memory pool which doesn't need to issue the actual allocation calls, but get buffers from a pre allocated pool. Or find a a way to disable reallocations (which sometimes can be very frequent in ITK, especially if doing streaming). Are these areas that the community would be interested in too? Has there been any developments or discussions about this earlier? Best regards, Fredrik Hellman On Tue, 30 Apr 2019 at 15:02, Simon Rit <[email protected]> wrote: > Hi, > Everything you're saying is correct. This development was co-funded by the > RTK consortium and Kitware and the goal was to transfer it to ITK. However, > this has never occurred and at this stage, it is only maintained in RTK. > Ideally, this could become an independent ITK module. > Is it something you'd like/need? > Cheers, > Simon > > On Tue, Apr 30, 2019 at 2:58 PM Fredrik Hellman <[email protected]> > wrote: > >> Hi all, >> >> I have a question about the the code that deals with cuda within RTK. >> >> RTK uses itk cuda image, the itk data manager, and itk context manager >> (but not itk kernel manager so much?) to handle cuda data. Is this >> maintained as part of RTK or is it maintained somewhere else and only used >> in RTK? Now when RTK becomes closer to ITK, what will happen to that code? >> >> Best regards, >> Fredrik >> > _______________________________________________ >> Rtk-users mailing list >> [email protected] >> https://public.kitware.com/mailman/listinfo/rtk-users >> >
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