I installed the cu9.0 mkl via below command. The first time for me to open the jupyter notebook to run a notebook to classify EMNIST data, the speed was twice of it under cu8.0. However, when I restart the system, that speed up disappeared.
pip install mxnet-cu90mkl
My system is ubuntu 16.04, cuda 9.0 and cudnn7.0 were all installed. The HW was an ASUS G751 laptop(980M 4G, 32G ram, 512SSD).