chinakook commented on issue #20471:
URL:
https://github.com/apache/incubator-mxnet/issues/20471#issuecomment-895792069
I've tested with a 2.0 version modified by myself on Windows, and It's OK.
```python
Input + Target gradient, CPU (OK):
{'.Inputs.Input':
[[-0.33333334 -0.33333334 -0.33333334]]
<NDArray 1x3 @cpu(0)>, '.Inputs.Target':
[[0.33333334 0.33333334 0.33333334]]
<NDArray 1x3 @cpu(0)>, 'seq_715248120': None}
Input + Target gradient, GPU (OK):
{'.Inputs.Input':
[[-0.33333334 -0.33333334 -0.33333334]]
<NDArray 1x3 @gpu(0)>, '.Inputs.Target':
[[0.33333334 0.33333334 0.33333334]]
<NDArray 1x3 @gpu(0)>, 'seq_715248120': None}
Target gradient only, CPU (OK):
{'.Inputs.Input': None, '.Inputs.Target':
[[0.33333334 0.33333334 0.33333334]]
<NDArray 1x3 @cpu(0)>, 'seq_715248120': None}
Target gradient only, GPU (WRONG):
{'.Inputs.Input': None, '.Inputs.Target':
[[0.33333334 0.33333334 0.33333334]]
<NDArray 1x3 @gpu(0)>, 'seq_715248120': None}
```
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