I am having an issue where I see packets in the #show hardware-interfaces but
only a very small fraction is deliver to the vlib engine
Here are the things I've tried
* Using different packet generators (pktgen/trex/tcpreplay)
* Using variety of physical servers
* All versions running from 19.01 to 20.01
* Tried multiple NICs (Mellanox ConnectX5) and Chelsio T6 (cxgb)
* Made sure checksums are ok since some NICs drop bad frames in the pmd
The vpp.conf is straight forward
unix {
nodaemon
log /var/log/vpp/vpp.log
cli-listen /run/vpp/cli.sock
interactive
}
dpdk {
dev 0000:86:00.0
dev 0000:86:00.1
}
Notes
- When connecting the two interfaces via xconnect things work well
- Tried using the macswap plugin and enabling it but exhibited the same very
slow behaviour
Here is the show interface counters after pushing ~1000000 packets
vpp# sh hardware-interfaces
Name Idx Link Hardware
HundredGigabitEthernet86/0/0 1 up HundredGigabitEthernet86/0/0
Link speed: 100 Gbps
Ethernet address ec:0d:9a:cd:94:8a
Mellanox ConnectX-4 Family
carrier up full duplex mtu 9206
flags: admin-up pmd maybe-multiseg rx-ip4-cksum
rx: queues 1 (max 65535), desc 1024 (min 0 max 65535 align 1)
tx: queues 1 (max 65535), desc 1024 (min 0 max 65535 align 1)
pci: device 15b3:1017 subsystem 15b3:0007 address 0000:86:00.00 numa 1
module: unknown
max rx packet len: 65536
promiscuous: unicast off all-multicast on
vlan offload: strip off filter off qinq off
rx offload avail: vlan-strip ipv4-cksum udp-cksum tcp-cksum vlan-filter
jumbo-frame scatter timestamp keep-crc
rx offload active: ipv4-cksum jumbo-frame scatter
tx offload avail: vlan-insert ipv4-cksum udp-cksum tcp-cksum tcp-tso
outer-ipv4-cksum vxlan-tnl-tso gre-tnl-tso multi-segs
udp-tnl-tso ip-tnl-tso
tx offload active: multi-segs
rss avail: ipv4 ipv4-frag ipv4-tcp ipv4-udp ipv4-other ipv6 ipv6-frag
ipv6-tcp ipv6-udp ipv6-other ipv6-tcp-ex ipv6-udp-ex
ipv6-ex ipv6-tcp-ex ipv6-udp-ex
rss active: none
tx burst function: mlx5_tx_burst_vec
rx burst function: mlx5_rx_burst
rx frames ok 1847
rx bytes ok 465972
extended stats:
rx good packets 1847
rx good bytes 465972
rx q0packets 1847
rx q0bytes 465972
rx port unicast packets 100006
rx port unicast bytes 1034369007
rx port multicast packets 1838
rx port multicast bytes 462894
rx port broadcast packets 9
rx port broadcast bytes 3078
rx packets phy 1000042
rx bytes phy 1038835147
vpp# sh int
Name Idx State MTU (L3/IP4/IP6/MPLS) Counter Count
HundredGigabitEthernet86/0/0 1 up 9000/0/0/0 rx packets 1856
rx bytes 467272
drops 1856
ip4 1816
ip6 26
local0 0 down 0/0/0/0
vpp#
You can see the packets are received in the unicast but for some reason they
are not being forwarded to further
Is there something obvious I am missing?
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