kpuatamazon edited a comment 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-609875547
 
 
   This still uses MKLDNN for `FullyConnected`
   ```
   cmake -GNinja -DUSE_CUDA=OFF -DCMAKE_BUILD_TYPE=Release -DBLAS=MKL 
-DUSE_MKL_IF_AVAILABLE=ON ..
   ```
   I was able to get MKL to run by disabling MKLDNN entirely:
   ```
   cmake -GNinja -DUSE_CUDA=OFF -DCMAKE_BUILD_TYPE=Release -DBLAS=MKL 
-DUSE_MKL_IF_AVAILABLE=ON -DUSE_MKLDNN=OFF ..
   ```
   But then I lose other kernels like DNNL softmax and actually Sockeye 
randomly crashes:
   ```
   mxnet.base.MXNetError: MXNetError: Out of range value for value, 
value='inf', in operator _full(name="", dtype="float32", value="inf", 
ctx="cpu(0)", shape="(5, 1)")
   ```
   (bizarrely this happens after it translated many sentences with that same 
code.)
   
   How do I achieve the fastest combination of DNNL softmax and MKL matrix 
multiply for `FullyConnected` using only documented options?  

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