[dpdk-users] only one vdev net_af_xdp being recognized

Ye Xiaolong xiaolong.ye at intel.com
Wed Jul 10 10:59:26 CEST 2019


Hi,

On 07/10, Jags N wrote:
>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 ?

Multiple af_xdp vdevs are supported.

>
>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

Here you need to use

--vdev net_af_xdp0,iface=enp0s9 --vdev net_af_xdp1,iface=enp0s10

Thanks,
Xiaolong

>> 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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