TaoLv commented on issue #17980: When compiled with MKL, fully_connected calls DNNL while dot and batch_dot call MKL URL: https://github.com/apache/incubator-mxnet/issues/17980#issuecomment-609820709 Thanks for raising the issue, @kpuatamazon. We plan to optimize the dot and batch_dot operator with DNNL MatMul primitive. But please note that, the performance of MatMul primitive was not optimized until v1.3 which was released last week. That's why we didn't integrate the primitive at the first time when it's introduced in v1.2. > When compiled with MKL, MXNet should call MKL directly from FullyConnected like it already does for dot and batch_dot. As mentioned above, dot and batch_dot will also be optimized with DNNL. And as DNNL is more dedicated on deep learning and has more friendly license, we will consider DNNL with high priority when both DNNL and MKL are enabled in compilation. Please provide a simple reproducer if you find FullyConnected based on DNNL is slower than it based on MKL BLAS.
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