<unnamed> (81, 19): parse expected comma after load's type

Reporting a bug

Im getting an error like pasted below while trying to run the most basic example taken from official WWW: https://developer.nvidia.com/blog/numba-python-cuda-acceleration/

import numpy as np
from numba import vectorize

@vectorize(['float32(float32, float32)'], target='cuda')
def Add(a, b):
  return a + b

N = 100000
A = np.ones(N, dtype=np.float32)
B = np.ones(A.shape, dtype=A.dtype)
C = np.empty_like(A, dtype=A.dtype)

C = Add(A, B)

Ubuntu 18.04.5, Numpy 1.19.4, Numba 0.52.0, kernel 5.4.58-050458-generic, CUDA 11.2.0, NVIDIA driver 460.27.04, GeForce GTX 1660

Traceback (most recent call last): File “GPUtest.py”, line 13, in <module> C = Add(A, B) File “/usr/local/lib/python3.6/dist-packages/numba/cuda/dispatcher.py”, line 37, in call return CUDAUFuncMechanism.call(self.functions, args, kws) File “/usr/local/lib/python3.6/dist-packages/numba/np/ufunc/deviceufunc.py”, line 300, in call cr.launch(func, shape[0], stream, devarys) File “/usr/local/lib/python3.6/dist-packages/numba/cuda/dispatcher.py”, line 148, in launch func.forall(count, stream=stream)(*args) File “/usr/local/lib/python3.6/dist-packages/numba/cuda/compiler.py”, line 372, in call kernel = self.kernel.specialize(*args) File “/usr/local/lib/python3.6/dist-packages/numba/cuda/compiler.py”, line 899, in specialize self._bind, targetoptions) File “/usr/local/lib/python3.6/dist-packages/numba/cuda/compiler.py”, line 811, in init self.compile(sigs[0]) File “/usr/local/lib/python3.6/dist-packages/numba/cuda/compiler.py”, line 952, in compile kernel.bind() File “/usr/local/lib/python3.6/dist-packages/numba/cuda/compiler.py”, line 576, in bind self._func.get() File “/usr/local/lib/python3.6/dist-packages/numba/cuda/compiler.py”, line 446, in get ptx = self.ptx.get() File “/usr/local/lib/python3.6/dist-packages/numba/cuda/compiler.py”, line 416, in get **self._extra_options) File “/usr/local/lib/python3.6/dist-packages/numba/cuda/cudadrv/nvvm.py”, line 548, in llvm_to_ptx ptx = cu.compile(**opts) File “/usr/local/lib/python3.6/dist-packages/numba/cuda/cudadrv/nvvm.py”, line 236, in compile self._try_error(err, ‘Failed to compile\n’) File “/usr/local/lib/python3.6/dist-packages/numba/cuda/cudadrv/nvvm.py”, line 254, in _try_error self.driver.check_error(err, “%s\n%s” % (msg, self.get_log())) File “/usr/local/lib/python3.6/dist-packages/numba/cuda/cudadrv/nvvm.py”, line 144, in check_error raise exc numba.cuda.cudadrv.error.NvvmError: Failed to compile

<unnamed> (81, 19): parse expected comma after load’s type NVVM_ERROR_COMPILATION

Is some default behavior changed and broke the decorator?

[stuartarchibald]

@stuartarchibald What is the latest CUDA we can use currently?

@AlexKurek I think it’s anything supported and <11.2, so 11.1.x would be the last compatible. We are aware of the issues and there’s work ongoing to provide 11.2+ support.

[AlyShmahell]

@AlexKurek yes it worked after downgrading to the following:

• cuda version 10.1
• llvmlite==0.31
• numba==0.48