69. DPDK Hotplug API Tests

This test for Hotplug API feature can be run on linux userspace. It will check if NIC port can be attached and detached without exiting the application process. Furthermore, it will check if it can reconfigure new configurations for a port after the port is stopped, and if it is able to restart with those new configurations. It is based on testpmd application.

The test is performed by running the testpmd application and using a traffic generator. Port configurations can be set interactively, and still be set at the command line when launching the application in order to be compatible with previous test framework.

69.1. Prerequisites

Assume DPDK managed at least one device for physical or none for virtual. This feature only supports igb_uio now, for uio_pci_generic is on the way, will test it after enabled.

To run the testpmd application in linuxapp environment with 4 lcores, 4 channels with other default parameters in interactive mode:

$ ./dpdk-testpmd -c 0xf -n 4 -- -i

Test ENV:

  • All test cases can be run in 32bit and 64bit platform.
  • OS support: Fedora, Ubuntu, RHEL, SUSE, but freebsd will not be included as hotplug has no plan to support that platform
  • All kernel version(from 2.6) can be support, for vfio need kernel version greater than 3.6.
  • Virtualization support: KVM/VMware/Xen, container is in the roadmap

69.2. Test Case 1: port detach & attach for physical devices with igb_uio

  1. Start testpmd:

    $ ./dpdk-testpmd -c 0xf -n 4 -- -i

  2. Bind new physical port to igb_uio(assume BDF 0000:02:00.0):

    # ./tools/dpdk_nic_bind -b igb_uio 0000:02:00.0

  3. Attach port 0:

    run "port attach 0000:02:00.0"

run "port start 0"

run "show port info 0", check port 0 info display.

  4. Check package forwarding when startup:

    run "start", then "show port stats 0" check forwarding packages start.

run "port detach 0", check the error message of port not stopped.

run "stop", then "show port stats 0", check forwarding packages stopped.

  5. Detach port 0 after port closed:

    run "port stop 0"

run "port close 0".

run "port detach 0", check port detached successful.

  6. Re-attach port 0(assume BDF 0000:02:00.0):

    run "port attach 0000:02:00.0",

run "port start 0".

run "show port info 0", check port 0 info display.

  7. Check package forwarding after re-attach:

    run "start", then "show port stats 0" check forwarding packages start.

run "port detach 0", check the error message of port not stopped.

run "stop", then "show port stats 0", check forwarding packages stopped.

69.3. Test Case 2: port detach and attach for physical devices with vfio

  1. Start testpmd:

    $ ./dpdk-testpmd -c 0xf -n 4 -- -i

  2. Bind new physical port to igb_uio(assume BDF 0000:02:00.0):

    # ./tools/dpdk_nic_bind -b vfio-pci 0000:02:00.0

  3. Attach port 0(assume BDF 0000:02:00.0):

    run "port attach 0000:02:00.0"

run "port start 0"

run "show port info 0", check port 0 info display.

  4. Detach port 0 after port closed:

    run "port stop 0", then "show port stats 0", check port stopped.

run "port close 0".

run "port detach 0", check detach status(should fail as no detach
                   support at the moment for vfio).

69.4. Test Case 3: port detach & attach for physical devices with uio_pci_generic

This case should be enabled after uio_pci_generic enabled for DPDK

  1. Start testpmd:

    $ ./dpdk-testpmd -c 0xf -n 4 -- -i

  2. Bind new physical port to igb_uio(assume BDF 0000:02:00.0):

    # ./tools/dpdk_nic_bind -b uio_pci_generic 0000:02:00.0

  3. Attach port 0(assume BDF 0000:02:00.0):

    run "port attach 0000:02:00.0"

run "port start 0"

run "show port info 0", check port 0 info display.

  4. Check package forwarding when startup:

    run "start", then "show port stats 0" check forwarding packages start.

run "port detach 0", check the error message of port not stopped.

run "stop", then "show port stats 0", check forwarding packages stopped.

  5. Detach port 0 after port closed:

    run "port stop 0"

run "port close 0".

run "port detach 0", check port detached successful.

  6. Re-attach port 0(assume BDF is 0000:02:00.0):

    run "port attach 0000:02:00.0",

run "port start 0".

run "show port info 0", check port 0 info display.

  7. Check package forwarding after re-attach:

    run "start", then "show port stats 0" check forwarding packages start.

run "port detach 0", check the error message of not stopped.

run "stop", then "show port stats 0", check forwarding packages stopped.

69.5. Test Case 4: port detach & attach for physical devices with igb_uio

Bind driver before testpmd started, port will start automatically

  1. Bind new physical port to igb_uio(assume BDF 0000:02:00.0):

    # ./tools/dpdk_nic_bind -b uio_pci_generic 0000:02:00.0

  2. Start testpmd:

    $ ./dpdk-testpmd -c 0xf -n 4 -- -i

  3. Check package forwarding when startup:

    run "start", then "show port stats 0" check forwarding packages start.

run "port detach 0", check the error message of port not stopped.

run "stop", then "show port stats 0", check forwarding packages stopped.

  4. Detach port 0 after port closed:

    run "port stop 0"

run "port close 0".

run "port detach 0", check port detached successful.

  5. Re-attach port 0(assume BDF 0000:02:00.0):

    run "port attach 0000:02:00.0",

run "port start 0".

run "show port info 0", check port 0 info display.

  6. Check package forwarding after re-attach:

    run "start", then "show port stats 0" check forwarding packages start.

run "port detach 0", check the error message of port not stopped.

run "stop", then "show port stats 0", check forwarding packages stopped.

69.6. Test Case 5: port detach & attach for virtual devices

  1. Start testpmd:

    $ ./dpdk-testpmd -c 0xf -n 4 -- -i

  2. Attach virtual device as port 0:

    run "port attach eth_pcap0,iface=xxxx", where "xxxx" is one workable ifname.

run "port start 0".

run "show port info 0", check port 0 info display correctly.

  3. Check package forwarding after port start:

    run "start", then "show port stats 0" check forwarding packages start.

run "port detach 0", check the error message of port not stopped.

run "stop", then "show port stats 0", check forwarding packages stopped.

  4. Detach port 0 after port closed:

    run "port stop 0".

run "port close 0".

run "port detach 0", check port detached successful.

  5. Re-attach port 0:

    run "port attach eth_pcap0,iface=xxxx", where "xxxx" is one workable ifname.

run "port start 0".

run "show port info 0", check port 0 info display correctly.

  6. Check package forwarding after port start:

    run "start", then "show port stats 0" check forwarding packages start.

run "port detach 0", check the error message of port not stopped.

run "stop", then "show port stats 0", check forwarding packages stopped.

69.7. Test Case 6: port detach & attach for virtual devices, with “–vdev”

  1. Start testpmd, “”xxxx” is one workable ifname:

    $ ./dpdk-testpmd -c 0xf -n 4 --vdev "eth_pcap0,iface=xxxx" -- -i

  2. Check package forwarding after port start:

    run "start", then "show port stats 0" check forwarding packages start.

run "port detach 0", check the error message of port not stopped.

run "stop", then "show port stats 0", check forwarding packages stopped.

  3. Detach port 0 after port closed:

    run "port stop 0".

run "port close 0".

run "port detach 0", check port detached successful.

  4. Re-attach port 0:

    run "port attach eth_pcap0,iface=xxxx", where "xxxx" is one workable ifname.

run "port start 0".

run "show port info 0", check port 0 info display correctly.

  5. Check package forwarding after port start:

    run "start", then "show port stats 0" check forwarding packages start.

run "port detach 0", check the error message of port not stopped.

run "stop", then "show port stats 0", check forwarding packages stopped.

69.8. Test Case 7: port detach & attach for vhost-user/virtio-user with “–vdev”

  1. Start testpmd with one vhost port:

    $ ./dpdk-testpmd -c 0xf -n 4 --no-pci --vdev 'eth_vhost0,iface=vhost-net,queues=1' -- -i

  2. Detach port 0 after port closed:

    run "port stop 0".
run "port detach 0", check port detached successful.

  3. Re-attach port 0:

    run "port attach eth_vhost1,iface=vhost-net1,queues=1"
run "port start 0". #then check socket generated

  4. Launch virtio-user and attach one virtio-user port:

    ./dpdk-testpmd -n 4 -l 7-8 --socket-mem 1024,1024 --no-pci --file-prefix=virtio1 -- -i
testpmd>port attach net_virtio_user1,mac=00:01:02:03:04:05,path=./vhost-net1,queues=1,packed_vq=1,mrg_rxbuf=1,in_order=0
testpmd>port start 0

  5. Run “start” on vhost port and run “start tx_first 32” on virtio-user port.

  6. Run “show port stats all”, check port 0 can rx/tx packets on both side.