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Posted to issues@mxnet.apache.org by GitBox <gi...@apache.org> on 2020/09/15 02:50:58 UTC

[GitHub] [incubator-mxnet] kohillyang commented on issue #18543: Gradient checkpointing in the Gluon interface

kohillyang commented on issue #18543:
URL: https://github.com/apache/incubator-mxnet/issues/18543#issuecomment-692430203


   Is it possible to implement MXNET_BACKWARD_DO_MIRROR if bacthnorm is used? It seems that the parameters of BatchNorm and SyncBatchNorm are updated by themselves (I'm not sure about this). So we may need some extra memory to store these old parameters. It is meaningful since we can assume the size of these parameters are small enough. However, it seems that in current implementation, updating of batchnorm parameters is disabled when MXNET_BACKWARD_DO_MIRROR  is set. 
   See <https://github.com/apache/incubator-mxnet/blob/beafba76395e75c093f99d20ac62e38f48e91012/src/operator/nn/cudnn/cudnn_batch_norm-inl.h#L131>.


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