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by dkbrk 957 days ago
It's curious that you say RTT is mostly random noise yet BBR gives you only 45 Mbps. The whole idea of BBR is that it probes bandwidth vs RTT and finds the point at which RTT starts to increase.

Maybe BBR is just misbehaving due to too much noise? Wouldn't a better approach be to tweak BBR to spend more time probing or change the model parameters that it uses to estimate link bandwidth?
2 comments
rfoo 956 days ago
> It's curious that you say RTT is mostly random noise yet BBR gives you only 45 Mbps.

I believe OP meant RTT fluctuate somewhere between 150ms to 250ms completely randomly even with no load at all, hence (the delta is) mostly random noice. Not that the RTT is below 0.1ms and barely measurable.

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bdd8f1df777b 957 days ago
Your idea does make sense. I'll try to see if I can tweak the BBR parameters on my server and achieve better performance.
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