tree 89631aab57c5808d535ce221d280d7e923745f29
parent 332c56f087ef61ea780d998c4dc14d18eac66a57
author Björn Terelius <terelius@webrtc.org> 1695816608 +0200
committer WebRTC LUCI CQ <webrtc-scoped@luci-project-accounts.iam.gserviceaccount.com> 1695893796 +0000

Subtract an additional 5kbps of the bitrate when backing off.

Traditionally, we'd back off to 85% of the measured throughput in response to an overuse. However, this backoff doesn't appear to be sufficient to drain the queues in some low-bitrate scenarios, and the problem has gotten a bit worse with the RobustThroughputEstimator. (The new estimate looks more stable. The old estimator had more variation, the lowest points were lower, causing backoffs to lower rates.)

With this change, we back off to 0.85*thoughput-5kbps. The difference is negligible except at low bitrates.

Bug: webrtc:13402,b/298636540
Change-Id: I53328953c056b8ad77f6c7561d6017f171b2dfbc
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/321701
Commit-Queue: Björn Terelius <terelius@webrtc.org>
Reviewed-by: Per Kjellander <perkj@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#40827}