feat(proto): add Prague/L4S congestion controller#2557
Open
HueCodes wants to merge 3 commits intoquinn-rs:mainfrom
Open
feat(proto): add Prague/L4S congestion controller#2557HueCodes wants to merge 3 commits intoquinn-rs:mainfrom
HueCodes wants to merge 3 commits intoquinn-rs:mainfrom
Conversation
Add a Prague congestion controller implementing L4S-compatible ECN-based congestion control. Uses DCTCP-style alpha EWMA to estimate the ECN marking fraction per RTT round and reduces the congestion window proportionally (cwnd * alpha/2) on ECN marks, falling back to classic halving on packet loss. References: RFC 9331, RFC 9332, RFC 8257 Closes quinn-rs#1498
Collaborator
|
🚀 out of curiosity, have you done any real-world experimentation? Do you have access to an Internet link with an L4s-capable AQM bottleneck? If so, could you share some numbers? |
Author
Haven't tested on a real L4S-capable link yet, only unit tests and simulated ECN marking. Happy to run some real-world experiments if you have a recommended test setup. |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Add a Prague congestion controller for L4S-compatible ECN-based congestion control (RFC 9331, RFC 9332, RFC 8257).
Uses DCTCP-style alpha EWMA to estimate ECN marking fraction per RTT round. Reduces the congestion window proportionally (cwnd * alpha/2) on ECN marks, with classic halving on packet loss.
Follows the same Controller/ControllerFactory patterns as NewReno, Cubic, and BBR. Includes 12 unit tests.
Closes #1498