Compilation without CUDA

[wojtat]

Hi!

I was wondering if there is a way to run this code with pytorch without CUDA available. I managed to make this run on a machine with CUDA, but I would like to run on my machine which doesn't have GPU capabilities. While running the python setup.py develop I encountered an error. OSError: CUDA_HOME environment variable is not set. Please set it to your CUDA install root. I have noticed the setup.py script has CUDAExtension in it, which I suspect might be a problem. I am not very familiar with pytorch or CUDA, so any help would be appreciated.

Thanks in advance!

[zhulf0804]

I think modifying the file https://github.com/zhulf0804/PointPillars/blob/main/ops/setup.py to CppExtension format can solve the above problem.

Please refer to PyTorch tutorial to know how to modify the code .

Best.

[wojtat]

Hi,

I tried modifying the files. It seems to work for voxelization because it has a CPU implementation. I don't see a CPU iou3d implementation, so I don't think that works. Is there an implementation of iou3d that doesn't use CUDA?

Thanks!

[gopalkumr]

i want to compile without cuda, i have modified code like this

`from setuptools import setup from torch.utils.cpp_extension import BuildExtension, CUDAExtension

setup( name='pointpillars', ext_modules=[ CUDAExtension( name='voxel_op', sources=['voxelization/voxelization.cpp', 'voxelization/voxelization_cpu.cpp', 'voxelization/voxelization_cuda.cu', ], define_macros=[('WITH_CUDA', None)]
), CUDAExtension( name='iou3d_op', sources=['iou3d/iou3d.cpp', 'iou3d/iou3d_kernel.cu', ], define_macros=[('WITH_CUDA', None)]
) ], cmdclass={ 'build_ext': BuildExtension })`

but still i'm getting this error

(py388) PS E:\github\PointPillars\ops> python setup.py develop
Traceback (most recent call last): File "setup.py", line 7, in CUDAExtension( File "E:\anaconda\envs\py388\lib\site-packages\torch\utils\cpp_extension.py", line 988, in CUDAExtension library_dirs += library_paths(cuda=True) File "E:\anaconda\envs\py388\lib\site-packages\torch\utils\cpp_extension.py", line 1110, in library_paths paths.append(_join_cuda_home(lib_dir)) File "E:\anaconda\envs\py388\lib\site-packages\torch\utils\cpp_extension.py", line 2130, in _join_cuda_home raise EnvironmentError('CUDA_HOME environment variable is not set. ' OSError: CUDA_HOME environment variable is not set. Please set it to your CUDA install root.

[jonasdieker]

@wojtat could you share what you did to at least make the voxelization work? Did you end up finding/writing an alternative function for the iou3d?