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
