ultragoose / bbrx

This project has two parts:

• tcp_bbrx kernel module (implements BBRx)
• tcp_stats collector (read tcp_stats over netlink socket)

The kernel patches and the module was test on linux-4.15.18. To test BBRx,

1. Apply the two patches to kernel source
2. Compile and install the kernel
3. Build the tcp_bbrx module: cd kernel_module make sudo insmod tcp_bbrx.ko
4. iperf3 -s
5. iperf3 -c localhost -t 10 -C bbrx

bbrx's Issues

where is the code to update  β and/or k ？

@ultragoose
Hello，thx for ur BBRx code. I have checked the source code of BBRx, but I am puzzled of the following issues:

1. According to your paper, that is 'The BBRx module table bins are updated separately by Learning Agent when it has a new  β and/or k update for the bin'，but I can't find where is the code to update β and/or k using the Empirical Auto-Tuning Method, neither in collect collectorCC.c and BBRx.cc.
2. Or can you explain in brief how to update β and/or k according to the actual network?
3. If you don't update β and k according to the real network, what is the purpose to get flow state using netlink in collectorCC.c?
4. How this algorithm performs in LTE where bandwidth and rtt vary quickly?

Thx a lot,
Looking forward to you reply.
EcinBin