improvement: make network device backlog a little bigger

[interduo]

No description provided.

[dtaht]

In general I don't like covering up real latency problems with more buffering. Is there a case you can demonstrate where this actually helps?

[interduo]

That is true what You said - too much buffering is bad, but too less generates packet loss.

Do some tests in some heavy production:
for i in {1..30}; do date +%s; cat /proc/net/softnet_stat; sleep 1; done

This counts how much packets go to hell. Apply this patch then and check again. Ubuntu defaults kernel value is pretty low, this value is used by kernel bridge but I am not pretty sure if its used when using XDP.

[dtaht]

thank you for supplying a test like this! We will add that to the upcoming test series.

[interduo]

This helps when not using XDP only. If we use XDP this setting does not matter. Please merge or close.