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

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

How to run

* 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

Note

  • 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]