chrishkchris opened a new pull request #588: [WIP] SINGA-505 SoftMaxBackward using CUDNN URL: https://github.com/apache/singa/pull/588 The current SoftMax backward is using numpy, which cannot be buffered. This PR uses cudnn SoftMaxBackward instead of numpy. However, I still need to implement the CPU DNNL SoftmaxBackward (https://intel.github.io/mkl-dnn/dev_guide_softmax.html), maybe after merging the DNNL library
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