fair-queuing-aware-congestion-control VS cpumap-pping

One nice side effect of fair queuing is that if endpoints knew that there's fair queuing on a path, they could use delay-minimizing congestion control since they don't have to be afraid of unfair competition.

https://github.com/muxamilian/fair-queuing-aware-congestion-...

fq_codel was successfully offloaded in a few products, however, no offload here, just a xeon with a ton of cores and a big L3. On the libreqos case we leveraged some ebpf to do packet steering in what we call the heimdal bridge, and also kathie nichol´s wonderful passive ping concept: https://github.com/thebracket/cpumap-pping

src here: https://github.com/LibreQoE/LibreQoS/

You can get a transparent high speed bridge with shaping capability up pretty rapidly with supported hardware.

I still long for an ethernet card that can do a trie lookup natively! The flamegraphs are mostly getting the right packet to the right cpu, still.