Dell OS10 (used on PowerSwitch S-series) supports RDMA over Converged Ethernet (RoCE). The SmartFabric manual has some good examples on how to configure it but here's the summary.
A few remarks first: you can choose which queue to place traffic in. The manual states Q3 which is the required queue if you also use iSCSI (which is by default placed in Q4), but if you don't use iSCSI, you can opt to place the traffic in Q4 instead of Q3.
Also, when entering the commands, be sure to check whether you're in the proper context in CONFIG mode. I did not add the necessary "exit" commands so don't blindly copy/paste this.
First, enable DCB(X), which is required for RoCE (PFC and ETS):