Hi,
What is the expected performance for AF_XDP txpnly in zero-copy and copy modes?
With Kernel 6.5.0 and the same ixgbe driver, this is what we see -
ZC mode: 4.3Mpps
Copy mode: 3.3Mpps
This doesn't seem right. Shouldn't the zero copy performance be MUCH higher?
host:~$ sudo ./ubuntu22.04-xdpsock -t -i enp2s0f0 -z
sock0@enp2s0f0:0 txonly xdp-drv
pps pkts 1.00
rx 0 0
tx 2,969,121 2,969,536
sock0@enp2s0f0:0 txonly xdp-drv
pps pkts 1.00
rx 0 0
tx 4,315,534 7,285,632
sock0@enp2s0f0:0 txonly xdp-drv
pps pkts 1.00
rx 0 0
tx 4,315,335 11,601,344
sock0@enp2s0f0:0 txonly xdp-drv
pps pkts 1.00
rx 0 0
tx 4,316,276 15,918,080
sock0@enp2s0f0:0 txonly xdp-drv
pps pkts 1.00
rx 0 0
tx 4,315,285 20,233,920
host:~$ sudo ./ubuntu22.04-xdpsock -t -i enp2s0f0 -c
sock0@enp2s0f0:0 txonly xdp-drv
pps pkts 1.00
rx 0 0
tx 3,326,724 3,327,744
sock0@enp2s0f0:0 txonly xdp-drv
pps pkts 1.00
rx 0 0
tx 3,314,220 6,642,688
sock0@enp2s0f0:0 txonly xdp-drv
pps pkts 1.00
rx 0 0
tx 3,317,285 9,960,448
sock0@enp2s0f0:0 txonly xdp-drv
pps pkts 1.00
rx 0 0
tx 3,323,394 13,284,352
Any thoughts or pointers or things to check for are appreciated!
Srivats
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