[dpdk-users] only one vdev net_af_xdp being recognized

Jags N jagsnn at gmail.com
Wed Jul 10 03:22:28 CEST 2019


Hi,

Continuing on my previous email,

https://doc.dpdk.org/guides/rel_notes/release_19_08.html  release not says
- Added multi-queue support to allow one af_xdp vdev with multiple netdev
queues

Does it in anyway imply only one af_xdp vdev is supported as of now, and
more than one af_xdp vdev may not be recognized ?

Regards,
Jags

On Mon, Jul 8, 2019 at 4:48 PM Jags N <jagsnn at gmail.com> wrote:

> 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 at 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
>
>


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