[Rtk-users] FDK and SART with GPU support is not terminating

[Jonas Westberg Jahn]

We have curerntly testing RTK with GPU support on a Lenovo P500 Workstation (Windows 7 64 bit, Xeon processor, 8GB RAM, and nVidia Quadro K620)

- Microsoft Visual Studio (Express) 2013
- CMake 3.4
- CUDA dev 7.5
- FFTW 3.3.4 (precompiled 64bit)
- ITK 4.8.2
- RTK (from Git 2016-01-20)

Copied "C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\bin\x86_amd64" to "amd64" (in bin folder) to make nvcc to work in MS VS Express, and created vcvars64.bat with the contents "CALL setenv /x64"
 
The following test works

rtksimulatedgeometry -n 180 -o geometry.xml
rtkprojectgeometricphantom -g geometry.xml -o projections.mha --spacing 2 --dimension 256 --phantomfile SheppLogan.txt
rtkadmmtotalvariation -p . -r projections.mha -o rtkadmmtotalvariation.mha -g geometry.xml --spacing 2 --dimension 256 --fp CudaRayCast --bp CudaVoxelBased
rtkadmmwavelets -p . -r projections.mha -o rtkadmmwavelets.mha -g geometry.xml --spacing 2 --dimension 256 --fp CudaRayCast --bp CudaVoxelBased
rtkconjugategradient -p . -r projections.mha -o rtkconjugategradient.mha -g geometry.xml --spacing 2 --dimension 256 --fp CudaRayCast --bp CudaVoxelBased

Fdk and sart does execute and create the output file when done processing. The GPU and CPU usage drops to zero, memory is still allocated but the process does not terminate!

rtkfdk -p . -r projections.mha -o fdk.mha -g geometry.xml --spacing 2 --dimension 256 --hardware cuda
rtksart -p . -r projections.mha -o sart.mha -g geometry.xml --spacing 2 --dimension 256 --fp CudaRayCast --bp CudaVoxelBased

You could kill the process manually but this would require monitoring the output file, GPU and CPU usage - not an ideal solution.

PS: I work with Rune Think at Odense University Hospital that also have collaborated to rtk by providing data for testing on cone beam from Elekta. I configure and compile rtk and he is using it in his Pd.D.

Regards, 

Jonas Westberg
MS in Computer Science ; Software Developer
Department of Oncology 
Laboratory of Radiation Physics
jonas.westberg at rsyd.dk - www.ouh.dk

OUH
Odense University Hospital

Sdr. Boulevard 29, Entrance 97, 5000 Odense C 
Denmark