oljike commented on issue #16969: Gradient accumulation in Module URL: https://github.com/apache/incubator-mxnet/issues/16969#issuecomment-563903578 Actually, I have resolved the problem. The key thing is to zero the gradients which are backwarded to the first model by `model_2._exec_group.shared_data_arrays[0]['grad of data_2'] *= 0` Also, rescale grad should be the same as in the desired batch size mode.
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