[GitHub] [incubator-mxnet] szha edited a comment on issue #13512: Clip_gradient setting in gluon.trainer doesn’t work

[GitBox <gi...@apache.org>]

szha edited a comment on issue #13512:
URL: https://github.com/apache/incubator-mxnet/issues/13512#issuecomment-688427818


   the gradient clipping happens inside optimizer update and is not updated back to the gradient buffers. if you are performing global gradient norm clipping, then you should use [trainer.allreduce_grads](https://github.com/apache/incubator-mxnet/blob/master/python/mxnet/gluon/trainer.py#L363-L373) first and then perform clipping with [gluon.utils.clip_global_norm](https://github.com/apache/incubator-mxnet/blob/master/python/mxnet/gluon/utils.py#L117)


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