[Bug 280386] if_bridge throws output errors under load

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=280386

--- Comment #9 from [email protected] ---
(In reply to Mark Johnston from comment #8)

Thanks Mark, i'm using iperf3 -s on the server and iperf3 -P4 -c 192.168.0.5 -t
60 on the client, which i believe does create multiple flows:

tcp4       0 1303796 192.168.0.150.53387    192.168.0.5.5201       ESTABLISHED
tcp4       0 1310084 192.168.0.150.17413    192.168.0.5.5201       ESTABLISHED
tcp4       0 1311532 192.168.0.150.56093    192.168.0.5.5201       ESTABLISHED
tcp4       0 1295148 192.168.0.150.54089    192.168.0.5.5201       ESTABLISHED


Here are the counters before the test run:
dev.igb.0.iflib.txq3.r_drops: 570
dev.igb.0.iflib.txq2.r_drops: 130
dev.igb.0.iflib.txq1.r_drops: 168
dev.igb.0.iflib.txq0.r_drops: 6250


Here are the counters after the 60 second test:
dev.igb.0.iflib.txq3.r_drops: 570
dev.igb.0.iflib.txq2.r_drops: 130
dev.igb.0.iflib.txq1.r_drops: 168
dev.igb.0.iflib.txq0.r_drops: 6360 <-- only this value increased


Is that expected behaviour?

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