A simple example to demonstrate how to write a rdma app over:

verbs APIs,
mlx5dv APIs, and
mlx5dv APIs over VFIO.

* In server side run: ./server [ib_devname]
* In client side run: ./client.verb [ib_devname] # Client based on verbs API
  or:
  ./client.dv [ib_devname] # Client based on dv API
  or:
  ./client.vfio [pci_name] # Client side based on vfio driver

• For server there's only 1 version, which is based on verbs APIs;

• These are hardcoded: client side:

  • SERVER_IP
  • client_sgid_idx (in client.c);
  • dmac (for RoCE; in pp_dv.c);
  • max_wr_num (number of wr posted; in client..c; Default is PP_MAX_WR);

  server side:

  • server_sgid_idx; max_wr_num(max same as the value in client side, need to improve);

  For max_wr_num not have to be changed; e.g., for debugging you may want to change it to 1.

• There's no wq overflow check.

--
Mark Zhang [email protected]