No this was multiple connections - and we tried with both `iperf2` and `iperf3`, UDP and TCP traffic. UDP actually does much worse on `iptables` than TCP, and I'm not sure why just yet.

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cptnntsoobv 17 hours ago | parent [-]

For UDP I'd look into GSO/GRO to get an upper bound on what pure kernel can do.

With performance benchmarking, specially in networking there is no end to "oh, but did you think of that?!" :)

	▲	shivanshvij 15 hours ago \| parent [-]
		That's a great point. This was one of my iPerf3 runs at one point: `iperf3 -c 172.31.45.187 -p 5201 -P 128 -t 5 -b 512M -u -l 1448 --bidir \| grep "\[SUM\]\[\(TX\\|RX\)-C\].*receiver"` We're also looking at using packet generators to test raw packet throughput. There's a lot more bottlenecks we can cleanup I'm sure.