Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

tvm ndarray to numpy conversion doesn't give the correct answer #150

Open
bethalianovike opened this issue Sep 13, 2024 · 0 comments
Open

Comments

@bethalianovike
Copy link

Hi, I try to convert tvm ndarray to numpy by dlpack's to_numpy function.
If the tvm ndarray's device is CPU, the returned numpy is correct, but if the device is OpenCL, the returned numpy is incorrect.
Is this function only support for tvm ndarray in CPU?
Here is the code and error message. Thank you in advance!

>>> import tvm
>>> import numpy as np
>>> from dlpack import to_numpy

>>> tvm_array = tvm.nd.array(np.random.normal(size=[10,10]),device=tvm.cpu(0))
>>> np_array_ref = tvm_array.numpy()
>>> np_array = to_numpy(tvm_array.__dlpack__())
>>> np.testing.assert_equal(actual=np_array, desired=np_array_ref)

>>> tvm_array = tvm.nd.array(np.random.normal(size=[10,10]),device=tvm.opencl(0))
>>> np_array_ref = tvm_array.numpy()
>>> np_array = to_numpy(tvm_array.__dlpack__())
>>> np.testing.assert_equal(actual=np_array, desired=np_array_ref)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/miniconda3/envs/test/lib/python3.11/site-packages/numpy/testing/_private/utils.py", line 282, in assert_equal
    return assert_array_equal(actual, desired, err_msg, verbose)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/miniconda3/envs/test/lib/python3.11/site-packages/numpy/testing/_private/utils.py", line 920, in assert_array_equal
    assert_array_compare(operator.__eq__, x, y, err_msg=err_msg,
  File "/home/miniconda3/envs/test/lib/python3.11/contextlib.py", line 81, in inner
    return func(*args, **kwds)
           ^^^^^^^^^^^^^^^^^^^
  File "/home/miniconda3/envs/test/lib/python3.11/site-packages/numpy/testing/_private/utils.py", line 797, in assert_array_compare
    raise AssertionError(msg)
AssertionError:
Arrays are not equal

Mismatched elements: 100 / 100 (100%)
Max absolute difference: 1.45371627e+135
Max relative difference: 6.57123264e+135
 x: array([[5.082078e-310, 0.000000e+000, 0.000000e+000, 3.211427e-322,
        5.082075e-310, 6.833474e-310, 5.082075e-310, 1.453716e+135,
        4.144523e-316, 2.080551e-314],...
 y: array([[-0.032956, -0.489345, -0.859244,  1.352982,  1.518199,  0.485014,
         0.862967,  0.221224,  0.062524, -1.04238 ],
       [ 0.660143, -1.057973, -0.581994, -0.640922, -0.100951,  0.78747 ,...
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
None yet
Projects
None yet
Development

No branches or pull requests

1 participant