Performance issue with aes-128-cbc-hmac-sha1 on Intel QAT8950

We are trying to evaluate the Intel QAT8950 card for crypto performance on a Ubuntu18 based system (Dual E5-2687W with 128GB RAM)

We had successfully built

- openssl with branch OpenSSL_1_1_0-stable
- QAT Driver 1.7
- QAT Engine v0.5.37

We were able to run successfully all the tests described in the "Intel Quick Assist Technology & OpenSSL 1.1.0: Performance" after setting up the proper configuration file.

However, while the performance goes up dramatically for the rsa2048, ecdsap256 and ecdhp256 for the QAT engine in asynchronous mode, the performance actually drops for the aes-128-cbc-hmac-sha1.

I have attached my test result vs the result form the Intel white paper in the PDF file.

[QAT Test.pdf](https://github.com/intel/QAT_Engine/files/2247086/QAT.Test.pdf)

Any pointer will be greatly appreciated.

Sam