http2: rewrite inbound flow control tracking

Add a new inflow type for tracking inbound flow control.
An inflow tracks both the window sent to the peer, and the
window we are willing to send. Updates are accumulated and
sent in a batch when the unsent window update is large

This change makes both the client and server use the same
algorithm to decide when to send window updates. This should
slightly reduce the rate of updates sent by the client, and
significantly reduce the rate sent by the server.

Fix a client flow control tracking bug: When processing data
for a canceled stream, the record of flow control consumed
by the peer was not updated to account for the discard

Fixes golang/go#28732
Fixes golang/go#56558

Change-Id: Id119d17b84b46f3dc2719f28a86758d9a10085d9
Reviewed-by: Brad Fitzpatrick <>
TryBot-Result: Gopher Robot <>
Reviewed-by: Heschi Kreinick <>
Run-TryBot: Damien Neil <>
6 files changed
tree: dbc9b7bf8de0dc156486ecd1a579fdbdc89aa953
  1. bpf/
  2. context/
  3. dict/
  4. dns/
  5. html/
  6. http/
  7. http2/
  8. icmp/
  9. idna/
  10. internal/
  11. ipv4/
  12. ipv6/
  13. lif/
  14. nettest/
  15. netutil/
  16. proxy/
  17. publicsuffix/
  18. route/
  19. trace/
  20. webdav/
  21. websocket/
  22. xsrftoken/
  23. .gitattributes
  24. .gitignore
  25. codereview.cfg
  27. go.mod
  28. go.sum

Go Networking

Go Reference

This repository holds supplementary Go networking libraries.


The easiest way to install is to run go get -u You can also manually git clone the repository to $GOPATH/src/

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This repository uses Gerrit for code changes. To learn how to submit changes to this repository, see The main issue tracker for the net repository is located at Prefix your issue with “x/net:” in the subject line, so it is easy to find.