Shame on me for not including bare-iron TCP_RR:
stack@fcperf-cp1-comp0001-mgmt:~$ grep "1 1" xps_tcp_rr_on_* | awk
'{t+=$6;r+=$9;s+=$10}END{print "throughput",t/NR,"recv sd",r/NR,"send
sd",s/NR}'
throughput 18589.4 recv sd 21.6296 send sd 20.5931
stack@fcperf-cp1-comp0001-mgmt:~$ grep "1 1" xps_tcp_rr_off_* |
awk '{t+=$6;r+=$9;s+=$10}END{print "throughput",t/NR,"recv
sd",r/NR,"send sd",s/NR}'
throughput 20883.6 recv sd 19.6255 send sd 20.0178
So that is 12% on TCP_RR throughput.
Looks like XPS shouldn't be enabled by default for ixgbe.
happy benchmarking,
rick jones