[dpdk-users] only one vdev net_af_xdp being recognized

[Jags N <jagsnn@gmail.com>]

Hi,

I am trying to understand net_af_xdp, and find that dpdk is recognizing
only one vdev net_af_xdp, hence only one port (port 0) is getting
configured. Requesting help to know if I am missing any information on
net_af_xdp support in dpdk, or if I have provided the EAL parameters wrong.
Kindly advice.

I am running Fedora 30.1-2 as Guest VM on Virtual Box VM Manager with Linux
Kernel 5.1.0, and dpdk-19.05. The interfaces are emulated ones mentioned
below,

lspci output ...
00:09.0 Ethernet controller: Intel Corporation 82545EM Gigabit Ethernet
Controller (Copper) (rev 02)
00:0a.0 Ethernet controller: Intel Corporation 82545EM Gigabit Ethernet
Controller (Copper) (rev 02)

DPDK testpmd is executed as mentioned below,

[root@localhost app]# ./testpmd -c 0x3 -n 4 --vdev net_af_xdp,iface=enp0s9
 --vdev net_af_xdp,iface=enp0s10 --iova-mode=va -- --portmask=0x3
EAL: Detected 3 lcore(s)
EAL: Detected 1 NUMA nodes
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
EAL: Probing VFIO support...
EAL: WARNING: cpu flags constant_tsc=no nonstop_tsc=no -> using unreliable
clock cycles !
EAL: PCI device 0000:00:03.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 8086:100e net_e1000_em
EAL: PCI device 0000:00:08.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 8086:100e net_e1000_em
EAL: PCI device 0000:00:09.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 8086:100f net_e1000_em
EAL: PCI device 0000:00:0a.0 on NUMA socket -1
EAL:   Invalid NUMA socket, default to 0
EAL:   probe driver: 8086:100f net_e1000_em
testpmd: create a new mbuf pool <mbuf_pool_socket_0>: n=155456, size=2176,
socket=0
testpmd: preferred mempool ops selected: ring_mp_mc

Warning! port-topology=paired and odd forward ports number, the last port
will pair with itself.

Configuring Port 0 (socket 0)
Port 0: 08:00:27:68:5B:66
Checking link statuses...
Done
No commandline core given, start packet forwarding
io packet forwarding - ports=1 - cores=1 - streams=1 - NUMA support
enabled, MP allocation mode: native
Logical Core 1 (socket 0) forwards packets on 1 streams:
  RX P=0/Q=0 (socket 0) -> TX P=0/Q=0 (socket 0) peer=02:00:00:00:00:00

  io packet forwarding packets/burst=32
  nb forwarding cores=1 - nb forwarding ports=1
  port 0: RX queue number: 1 Tx queue number: 1
    Rx offloads=0x0 Tx offloads=0x0
    RX queue: 0
      RX desc=0 - RX free threshold=0
      RX threshold registers: pthresh=0 hthresh=0  wthresh=0
      RX Offloads=0x0
    TX queue: 0
      TX desc=0 - TX free threshold=0
      TX threshold registers: pthresh=0 hthresh=0  wthresh=0
      TX offloads=0x0 - TX RS bit threshold=0
Press enter to exit

Telling cores to stop...
Waiting for lcores to finish...

  ---------------------- Forward statistics for port 0
 ----------------------
  RX-packets: 0              RX-dropped: 0             RX-total: 0
  TX-packets: 0              TX-dropped: 0             TX-total: 0

----------------------------------------------------------------------------

  +++++++++++++++ Accumulated forward statistics for all
ports+++++++++++++++
  RX-packets: 0              RX-dropped: 0             RX-total: 0
  TX-packets: 0              TX-dropped: 0             TX-total: 0

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Done.

Stopping port 0...
Stopping ports...
Done

Shutting down port 0...
Closing ports...
Done

Bye...

Regards,
Jags