-
Notifications
You must be signed in to change notification settings - Fork 2k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Bug 1906853 - add glean probe for http3 udp datagram size r=necko-rev…
…iewers,kershaw,janerik This commit adds four Glean probes: - http3_udp_datagram_segment_size_sent - http3_udp_datagram_segment_size_received - http3_udp_datagram_size_received - http3_udp_datagram_num_segments_received Given the performance impact tracking Glean metrics in the UDP hot path, see https://phabricator.services.mozilla.com/D216034#7453056, this commit introduces a sample buffer per metric. This will enable us to measure the impact of: - Implementation of Packetization Layer Path MTU Discovery for Datagram Transports (RFC 8899) [in Neqo](mozilla/neqo#1903) - [Fast UDP for Firefox](https://bugzilla.mozilla.org/show_bug.cgi?id=1901292) Differential Revision: https://phabricator.services.mozilla.com/D216034
- Loading branch information
Showing
3 changed files
with
193 additions
and
3 deletions.
There are no files selected for viewing
This file contains 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
This file contains 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
This file contains 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
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| /* This Source Code Form is subject to the terms of the Mozilla Public | ||
| * License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| * file, You can obtain one at https://mozilla.org/MPL/2.0/. */ | ||
|
|
||
| use std::cell::RefCell; | ||
| #[cfg(not(target_os = "android"))] | ||
| use std::convert::{TryFrom, TryInto}; | ||
|
|
||
| use firefox_on_glean::metrics::networking as glean; | ||
|
|
||
| #[cfg(not(target_os = "android"))] | ||
| const BUFFER_SIZE: usize = 1024; | ||
|
|
||
| std::thread_local! { | ||
| pub static METRICS: RefCell<BufferedMetrics> = RefCell::new(BufferedMetrics::default()); | ||
| } | ||
|
|
||
| #[allow(dead_code)] | ||
| pub struct BufferedMetric<S> { | ||
| buffer: Vec<S>, | ||
| sync: fn(Vec<S>), | ||
| } | ||
|
|
||
| impl<S> BufferedMetric<S> { | ||
| fn new(f: fn(Vec<S>)) -> Self { | ||
| Self { | ||
| buffer: vec![], | ||
| sync: f, | ||
| } | ||
| } | ||
| } | ||
|
|
||
| #[cfg(not(target_os = "android"))] | ||
| impl<S: TryFrom<usize>> BufferedMetric<S> { | ||
| pub fn sample(&mut self, sample: usize) { | ||
| let Ok(sample) = sample.try_into() else { | ||
| neqo_common::qdebug!("failed to convert {sample} to metric's sample type"); | ||
| return; | ||
| }; | ||
| self.buffer.push(sample); | ||
| if self.buffer.len() == BUFFER_SIZE { | ||
| self.sync_to_glean(); | ||
| } | ||
| } | ||
|
|
||
| fn sync_to_glean(&mut self) { | ||
| if !self.buffer.is_empty() { | ||
| (self.sync)(std::mem::take(&mut self.buffer)); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // Noop on Android for now, due to performance regressions. | ||
| // - <https://bugzilla.mozilla.org/show_bug.cgi?id=1898810> | ||
| // - <https://bugzilla.mozilla.org/show_bug.cgi?id=1906664> | ||
| #[cfg(target_os = "android")] | ||
| impl<S> BufferedMetric<S> { | ||
| pub fn sample(&mut self, _sample: usize) {} | ||
|
|
||
| fn sync_to_glean(&mut self) {} | ||
| } | ||
|
|
||
| pub struct BufferedMetrics { | ||
| pub datagram_segment_size_sent: BufferedMetric<u64>, | ||
| pub datagram_segment_size_received: BufferedMetric<u64>, | ||
| pub datagram_size_received: BufferedMetric<u64>, | ||
| pub datagram_segments_received: BufferedMetric<i64>, | ||
| } | ||
|
|
||
| impl Default for BufferedMetrics { | ||
| fn default() -> Self { | ||
| Self { | ||
| datagram_segment_size_sent: BufferedMetric::new(|samples| { | ||
| glean::http_3_udp_datagram_segment_size_sent.accumulate_samples(samples) | ||
| }), | ||
| datagram_segment_size_received: BufferedMetric::new(|samples| { | ||
| glean::http_3_udp_datagram_segment_size_received.accumulate_samples(samples) | ||
| }), | ||
| datagram_size_received: BufferedMetric::new(|samples| { | ||
| glean::http_3_udp_datagram_size_received.accumulate_samples(samples) | ||
| }), | ||
| datagram_segments_received: BufferedMetric::new(|samples| { | ||
| glean::http_3_udp_datagram_segments_received.accumulate_samples_signed(samples) | ||
| }), | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl BufferedMetrics { | ||
| pub fn sync_to_glean(&mut self) { | ||
| self.datagram_segment_size_sent.sync_to_glean(); | ||
| self.datagram_segment_size_received.sync_to_glean(); | ||
| self.datagram_size_received.sync_to_glean(); | ||
| self.datagram_segments_received.sync_to_glean(); | ||
| } | ||
| } |