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Missing error checks for cuSOLVER calls

See original GitHub issue

Some linalg routines do not check the dev_info variable for errors after calling cuSOLVER. If it is a negative number, then linalg.LinAlgError should be raised.

Missing checks: inv https://github.com/cupy/cupy/blob/master/cupy/linalg/solve.py#L287-L295 qr https://github.com/cupy/cupy/blob/master/cupy/linalg/decomposition.py#L163-L176

Issue Analytics

State:
Created 4 years ago
Comments:22 (22 by maintainers)

Top GitHub Comments

1reaction

niboshicommented, Aug 29, 2019

@hvy Unfortunately it’s not documented, but if my understanding is correct, it has been the central policy since the beginning of the development.

For example, many functions do not accept numpy.ndarrays because supporting that would expose users to unexpected synchronization that is difficult to even notice.

1reaction

kmaehashicommented, Aug 29, 2019

Another case that performs sync to retrieve devInfo to follow NumPy spec:

If the determinant is zero, then sign will be 0 and logdet will be -Inf.

https://github.com/cupy/cupy/blob/97c72a3c729f63fe86bc2349fb9c4433bbd9eeab/cupy/linalg/norms.py#L246-L249

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