[dpdk-dev] testpmd / SR-IOV RX packets, but TX-errors

Bill Michalowski bmichalo at redhat.com
Thu Oct 17 14:33:18 CEST 2019


Solved... had to disable spoof checking:

ip link set p7p1 vf 0 spoofchk off
ip link set p7p2 vf 0 spoofchk off

Thank you!

On Tue, Oct 15, 2019 at 11:03 AM Bill Michalowski <bmichalo at redhat.com>
wrote:

> Thank you for the suggestion Lance, but that didn't correct the problem.
>
> That being said, I would think that testpmd in "io" mode would just
> forward the packets in the SR-IOV case just as it successfully does with
> testpmd across the PFs (non SR-IOV) - but I could be wrong.
>
> On Tue, Oct 15, 2019 at 10:26 AM Lance Richardson <
> lance.richardson at broadcom.com> wrote:
>
>> Hi Bill,
>>
>> This is just a guess, but perhaps the transmit drops are due to MAC
>> anti-spoofing checks?
>>
>> You could probably prove/disprove by making the packet source MAC
>> match the transmit VF's MAC.
>>
>>     Lance
>>
>>
>> On Tue, Oct 15, 2019 at 10:01 AM Bill Michalowski <bmichalo at redhat.com>
>> wrote:
>> >
>> > I'm trying run testpmd with SR-IOV, specifically across two VFs.  I see
>> > packets being received successfully by the application but they are not
>> > being transmitted.  They are dropped with the 'TX-errors' counters
>> > incrementing.
>> >
>> > However, if I generate the same traffic and the DUT isn't programmed
>> with
>> > SR-IOV, but with testpmd just across PFs, the packets are transmitted
>> just
>> > fine and I don't have any TX-errors.  I'm hoping someone can help me
>> figure
>> > out why the TX packets are being dropped in the SR-IOV case.
>> >
>> > testpmd is running in the default "io" mode.
>> >
>> > The DUT is a two port Intel xxv710 25G card.  To simplify things, I'm
>> not
>> > actually using a guest, just testpmd across VFs.
>> >
>> > *# rpm -qa | grep dpdk*
>> > dpdk-18.11.2-1.el7.x86_64
>> >
>> > *# uname -r*
>> > 3.10.0-1062.1.2.el7.x86_64
>> >
>> > *# cat /etc/redhat-release *
>> > Red Hat Enterprise Linux Server release 7.7 (Maipo)
>> >
>> > PFs:
>> >
>> > #* ethtool -i p7p1*
>> > driver: i40e
>> > version: 2.10.19.30
>> > firmware-version: 6.80 0x80003d17 18.8.9
>> > expansion-rom-version:
>> > bus-info: 0000:86:00.0
>> >
>> > *# ethtool -i p7p2*
>> > driver: i40e
>> > version: 2.10.19.30
>> > firmware-version: 6.80 0x80003d17 18.8.9
>> > expansion-rom-version:
>> > bus-info: 0000:86:00.1
>> >
>> > Procedure:
>> >
>> > Create VFs:
>> >
>> > *#echo 1 > /sys/class/net/p7p1/device/sriov_numvfs*
>> >
>> > *#echo 1 > /sys/class/net/p7p2/device/sriov_numvfs*
>> >
>> > *# ip l*
>> > 4: p7p1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP
>> mode
>> > DEFAULT group default qlen 1000
>> >     link/ether 3c:fd:fe:b9:c8:a0 brd ff:ff:ff:ff:ff:ff
>> >     vf 0 MAC 00:00:00:00:00:00, spoof checking on, link-state auto,
>> trust
>> > off
>> > 5: p7p2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP
>> mode
>> > DEFAULT group default qlen 1000
>> >     link/ether 3c:fd:fe:b9:c8:a1 brd ff:ff:ff:ff:ff:ff
>> >     vf 0 MAC 00:00:00:00:00:00, spoof checking on, link-state auto,
>> trust
>> > off
>> > 13: p7p1_0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode
>> > DEFAULT group default qlen 1000
>> >     link/ether 6a:ff:a3:55:23:4e brd ff:ff:ff:ff:ff:ff
>> > 14: p7p2_0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode
>> > DEFAULT group default qlen 1000
>> >     link/ether da:a1:1c:c4:6c:e7 brd ff:ff:ff:ff:ff:ff
>> >
>> > *# ethtool -i p7p1_0*
>> > driver: iavf
>> > version: 3.7.53
>> > firmware-version: N/A
>> > expansion-rom-version:
>> > bus-info: 0000:86:02.0
>> >
>> > *# ethtool -i p7p2_0*
>> > driver: iavf
>> > version: 3.7.53
>> > firmware-version: N/A
>> > expansion-rom-version:
>> > bus-info: 0000:86:0a.0
>> >
>> > Set MAC addresses:
>> >
>> > *#ip link set p7p1 vf 0 mac a0:b0:c0:d0:e0:f0*
>> > *#ip link set p7p2 vf 0 mac 66:55:44:33:22:11*
>> >
>> > Set trust mode:
>> >
>> >
>> >
>> > *#ip link set p7p1 vf 0 trust on#ip link set p7p2 vf 0 trust on*
>> >
>> > Unbind iavf from VFs and bind vfio-pci to them:
>> >
>> > *# modprobe vfio-pci*
>> > *# dpdk-devbind -u 0000:86:02.0 0000:86:0a.0*
>> > *# dpdk-devbind -b vfio-pci 0000:86:02.0 0000:86:0a.0*
>> > *# dpdk-devbind -s*
>> >
>> > Network devices using DPDK-compatible driver
>> > ============================================
>> > 0000:86:02.0 'Ethernet Virtual Function 700 Series 154c' drv=vfio-pci
>> > unused=iavf
>> > 0000:86:0a.0 'Ethernet Virtual Function 700 Series 154c' drv=vfio-pci
>> > unused=iavf
>> >
>> > Start testpmd:
>> >
>> > #*/usr/bin/testpmd -l 1,3,35 --socket-mem 1024,1024 -n 4 --proc-type
>> auto
>> > --file-prefix testpmd0 -w 0000:86:02.0 -w 0000:86:0a.0 -- --nb-cores=2
>> > --nb-ports=2 --portmask=3 --auto-start --rxq=1 --txq=1 --rxd=2048
>> > --txd=2048 -i*
>> >
>> > Starting traffic at the far end, packets are RX successfully on the DUT
>> but
>> > not TX, with many TX-errors:
>> >
>> > *testpmd> show port stats all*
>> >
>> >   ######################## NIC statistics for port 0
>> >  ########################
>> >   RX-packets: 144132155  RX-missed: 0          RX-bytes:  9224457088
>> >   RX-errors: 0
>> >   RX-nombuf:  0
>> >   TX-packets: 0          TX-errors: 137664400  TX-bytes:  0
>> >
>> >   Throughput (since last show)
>> >   Rx-pps:     19000875
>> >   Tx-pps:            0
>> >
>> >
>> ############################################################################
>> >
>> >   ######################## NIC statistics for port 1
>> >  ########################
>> >   RX-packets: 144324307  RX-missed: 0          RX-bytes:  9236754880
>> >   RX-errors: 0
>> >   RX-nombuf:  0
>> >   TX-packets: 0          TX-errors: 137873118  TX-bytes:  0
>> >
>> >   Throughput (since last show)
>> >   Rx-pps:     19000772
>> >   Tx-pps:            0
>> >
>> >
>> ############################################################################
>> >
>> > Thanks for any help.
>> >
>> > - Bill
>>
>


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