Hello,
I've been trying to do some basic performance testing on 20.01 using the
vpp_echo application, and while I'm getting the expected performance with TCP,
I'm not quite able to achieve what I would expect with UDP. The NICs are 10G
X520, and on TCP I get around 9.5 Gbps, but with UDP I get about 6.5 Gbps with
about 30% packet loss.
The commands I use are:
*Server* : ./vpp_echo socket-name /tmp/vpp-api.sock uri udp://10.0.0.71/9999
fifo-size 1000000 uni RX=50Gb TX=0 stats 1 sclose=Y rx-buf 1400 tx-buf 0
mq-size 100000
*Client* : ./vpp_echo socket-name /tmp/vpp-api.sock client uri
udp://10.0.0.71/9999 fifo-size 1000000 uni TX=50Gb RX=0 stats 1 sclose=Y tx-buf
1400 rx-buf 0
(For TCP tests the commands are pretty much the same, except for the URI which
is tcp://...)
I have a couple of hints but not sure how to make the necessary tweaks to
improve performance. On the receiver side, *vpp# sh hardware-interfaces* shows:
rx offload avail: vlan-strip ipv4-cksum udp-cksum tcp-cksum tcp-lro
macsec-strip vlan-filter vlan-extend jumbo-frame scatter
security keep-crc
rx offload active: ipv4-cksum jumbo-frame scatter
I'm thinking that udp-cksum not being active is an issue, is this something
that I need to explicitly enable somehow? I do have the following in
startup.conf:
dpdk {
dev 0000:05:00.0{
num-rx-desc 1024
num-tx-desc 1024
tso on
}
enable-tcp-udp-checksum
}
My other clue is this (again on the receiver side):
vpp# sh interface
Name Idx State MTU (L3/IP4/IP6/MPLS) Counter
Count
TenGigabitEthernet5/0/0 1 up 9000/0/0/0 rx packets
25107326
rx bytes 36136837440
tx packets 1
tx bytes 60
drops 44
ip4 25107281
rx-miss 11599259
Any tips on what might be causing the rx-miss, or things I should tune to
improve this for UDP?
Thank you!
Dom
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