On 2024/10/23 22:36, Oliver Schweger wrote: > I’ll test your recommendations over the next few days, but I don’t expect > -tcplro to make any difference, as wireguard only uses udp.
However TCP can be carried inside wg. And some things are carried from an "inner" packet to a packet carried in some outer layer. I've not looked at how things are done with wg(4) but it's not impossible that something is carried across which shouldn't be. > For the nic, I can choose between virtio, e1000, and rtl8139, so I’ll be > testing each one individually, both with and without ipv6. People have definitely reported issues where some em(4) and some vio(4) are involved. However there are various complexities: firstly these drivers support various different types of interface with different options, secondly the interface type where a packet is *received* is involved. So for example a packet rx'd on some interface, wrapped in wg(4), then tx'd on a TSO interface, may result in different behaviour depending on whether the rx interface has LRO or not.
