1906853 - add glean probe for http3 udp datagram size

Status: RESOLVED FIXED

(Core :: Networking, enhancement, P2)

Description

[Max Inden]

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:127.0) Gecko/20100101 Firefox/127.0

Comment 1

[Max Inden]

As part of this Bug I would like to add two Glean metrics:

• http3_udp_datagram_size_send
• http3_udp_datagram_size_received

This will enable us to measure the impact of:

• Implementation of Packetization Layer Path MTU Discovery for Datagram Transports (RFC 8899) in Neqo
• Fast UDP for Firefox

Comment 2

[Max Inden]

Attachment: Bug 1906853 - add glean probe for http3 udp datagram size r=janerik,jesup,kershaw

This commit adds two Glean probes:

• http3_udp_datagram_size_send
• http3_udp_datagram_size_received

This will enable us to measure the impact of:

• Implementation of Packetization Layer Path MTU Discovery for Datagram Transports (RFC 8899) in Neqo
• Fast UDP for Firefox

Comment 3

[Max Inden]

Jan-Erik can you give another estimate for Bugzilla#1915388?

In case Bugzilla#1915388 can be used sometime this week, I suggest blocking here as discussed out-of-band. No need to introduce an intermediary solution.

Otherwise I would like to put the thread-local metric buffer proposed in phabricator#D216034 up for review. See netwerk/socket/neqo_glue/src/metrics.rs in phabricator#D216034.

In my eyes the thread-local metric buffer is a good intermediary solution until Bugzilla#1915388 is ready. It will enable us to measure the impact of bugzilla#1901295 (currently in Nightly) and bugzilla#1909910. Before promoting either of these two patches to beta, we can replace the intermediary thread-local metric buffer solution with Bugzilla#1915388.

What do you think?

Comment 4

[Jan-Erik Rediger [:janerik] (Away 2026-04-29 - 2026-05-01]

I'm waiting for bug 1914241 and related to land (hopefully today), after that I can do the rest of the work for Glean. So my estimate is still by end of this week.
As said in our meeting I do'nt want to block you further, so if you want to go with your buffer for the time being I'm happy to do the work to switch it out once the Glean solution landed though.

Comment 5

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/16d3f3129704
add glean probe for http3 udp datagram size r=necko-reviewers,kershaw,janerik

Comment 6

[Norisz Fay [:noriszfay]]

https://hg.mozilla.org/mozilla-central/rev/16d3f3129704