[Cerowrt-devel] BBR congestion control algorithm for TCP in net-next
swmike at swm.pp.se
Wed Sep 21 06:15:15 EDT 2016
On Wed, 21 Sep 2016, Dave Taht wrote:
> I dunno, I'm just reading tea leaves here!
> can't wait for the paper!
I would like to understand how BBR interacts with a window-fully-open
classic TCP session and FIFO induced delay that is in steady-state before
the BBR session starts.
So let's say I have 100ms of lightspeed-in-fiber RTT, and I am then
running a file transfer with some other TCP algorithm which is sitting
there, window fully open, creating an additional 100ms of
So new BBR TCP session comes along, sees 200ms of RTT, and starts sending.
I guess the classic TCP algorithm still keeps its window fully open, and
doesn't care that RTT now increased to 210ms by the BBR flow packets.
Now what? BBR flow sees increased latency, and backs off, right? So how
much of the bandwidth will each flow get? How do these interact?
Mikael Abrahamsson email: swmike at swm.pp.se
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