先前 Ubuntu 桌機用 BBR 跑了一陣子，但有遇到一些問題 (可以參考「Dropbox 測試 BBRv2 的結果」這篇)，所以暫時換成 Westwood，但還是陸陸續續會看一下各種研究。
剛剛在「[tor-relays] TCP CCA for Tor Relays (and especially Bridges)」這邊看到一個經驗談：
Here are my completely unscientific scribbles of how all the various algorithms behaved. The scenario is uploading for a minute or so, observing the speed in MB/sec visually, then recording how it appeared to change during that minute (and then repeating this a couple of times to be certain). tcp_bic.ko -- 6...5...4 tcp_highspeed.ko -- 2 tcp_htcp.ko -- 1.5...3...2 tcp_hybla.ko -- 3...2...1 tcp_illinois.ko -- 6...7...10 tcp_lp.ko -- 2...1 tcp_scalable.ko -- 5...4...3 tcp_vegas.ko -- 2.5 tcp_veno.ko -- 2.5 tcp_westwood.ko -- <1 tcp_yeah.ko -- 2...5...6
上面是「目視法」觀察到的速度 (MB/sec)，看了一下維基百科上 TCP-Illinois 的說明，看起來設計的目的是提供給頻寬大、latency 高的情境下：
It is especially targeted at high-speed, long-distance networks.
來跑跑看好了...