zheng-da commented on a change in pull request #11301: MKLDNN Backward op cache
URL: https://github.com/apache/incubator-mxnet/pull/11301#discussion_r200819284
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File path: src/operator/nn/lrn.cc
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@@ -129,6 +129,8 @@ void LRNComputeExCPU(const nnvm::NodeAttrs &attrs,
MKLDNN_OPCHECK_INIT(false, 1, inputs, outputs);
MKLDNNLRNForward(ctx, param, inputs[0], req[0], outputs[0]);
MKLDNN_OPCHECK_RUN(LRNCompute<cpu>, attrs, ctx, inputs, req, outputs);
+ // Copy outputs[1] from opcheck reference as backward check needs it.
+ MKLDNN_OPCHECK_COPY_RESULT(outputs, std::vector<size_t>{1});
Review comment:
do we have to it for all operators?
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