Could you try this:
* Install WinOF-2 v.1.70
* Try the Microsoft tool TechNet NTttcp Utility: Profile and Measure Windows Networking Performance
* Verify RDMA performance by running nd_read_bw/nd_write_bw ( check WinOF user manual)
Thank you. I tried NTttcp with different send buffer size and datagram size. I was able to get 4.8 GBytes speed on 40Gbps link.