Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Instrumenting Async Runtime
Search
mox692
December 15, 2024
Programming
0
76
Instrumenting Async Runtime
This is a presentation I gave in the Rust.Tokyo conference 2024.
mox692
December 15, 2024
Tweet
Share
More Decks by mox692
See All by mox692
Implementing Async MPMC Channel in Rust
kimuramotoyuki
0
15
Bug-Free Concurrency in Rust
kimuramotoyuki
0
15
Other Decks in Programming
See All in Programming
初学者でも今すぐできる、Claude Codeの生産性を10倍上げるTips
s4yuba
14
9.6k
Google Agent Development Kit でLINE Botを作ってみた
ymd65536
2
220
Is Xcode slowly dying out in 2025?
uetyo
1
250
dbt民主化とLLMによる開発ブースト ~ AI Readyな分析サイクルを目指して ~
yoshyum
3
660
データの民主化を支える、透明性のあるデータ利活用への挑戦 2025-06-25 Database Engineering Meetup#7
y_ken
0
340
第9回 情シス転職ミートアップ 株式会社IVRy(アイブリー)の紹介
ivry_presentationmaterials
1
260
0626 Findy Product Manager LT Night_高田スライド_speaker deck用
mana_takada
0
150
エンジニア向け採用ピッチ資料
inusan
0
180
ふつうの技術スタックでアート作品を作ってみる
akira888
0
420
関数型まつりレポート for JuliaTokai #22
antimon2
0
160
Code as Context 〜 1にコードで 2にリンタ 34がなくて 5にルール? 〜
yodakeisuke
0
120
5つのアンチパターンから学ぶLT設計
narihara
1
160
Featured
See All Featured
How to Create Impact in a Changing Tech Landscape [PerfNow 2023]
tammyeverts
53
2.8k
jQuery: Nuts, Bolts and Bling
dougneiner
63
7.8k
StorybookのUI Testing Handbookを読んだ
zakiyama
30
5.9k
The MySQL Ecosystem @ GitHub 2015
samlambert
251
13k
GraphQLとの向き合い方2022年版
quramy
49
14k
Reflections from 52 weeks, 52 projects
jeffersonlam
351
20k
Creating an realtime collaboration tool: Agile Flush - .NET Oxford
marcduiker
30
2.1k
Exploring the Power of Turbo Streams & Action Cable | RailsConf2023
kevinliebholz
34
5.9k
Writing Fast Ruby
sferik
628
62k
A designer walks into a library…
pauljervisheath
207
24k
Templates, Plugins, & Blocks: Oh My! Creating the theme that thinks of everything
marktimemedia
31
2.4k
Practical Tips for Bootstrapping Information Extraction Pipelines
honnibal
PRO
20
1.3k
Transcript
Instrumenting Async Runtime Rust.Tokyo 2024 Motoyuki Kimura 1
• Rust Developer 🦀 • Used to use Scala •
A organization member of tokio-rs Hi, I’m Motoyuki(@mox692) 👋 2
Agenda • Share my attempt for async runtime tracing ◦
Recap monitoring ecosystem in Async Rust ◦ What is runtime tracing? ◦ How does it works? ◦ Lessons, challenges 3
Monitoring is important 4
How to achieve a monitoring? • Logging (println!, log! etc…)
• Capture a backtrace • System metrics etc … 5
What about async Rust? 6
… Sometimes, a bit tricky 7
8 Async Task Task1 Task2 Execution
9 Async Task Task1 Task2 Execution .await .await .await
10 Async Task Task1 Task2 .await .await .await Task1 Task1
Task2 Task2
11
12
13
Are there any async-aware tools available today? 14
• Metrics • Tokio-console • Taskdump 15
16 Runtime Metrics
17
18
19
20 Task dump
21 Task dump
Would this be enough? 22
23 Case1: Tasks are not distributed Thread Core
24 Case2: Long running tasks
25 Case2: Long running tasks
26 Case3: Not sure what happens behind the scene 😇
27 • Async runtime tend to be a blackbox •
It would be cool if we have a tool that focuses on the event occurred in the runtime
Prior Art? 28
29
30
31 Goroutine Backtrace
32
33
34 It is integrated into the Java Virtual Machine (JVM)
and causes almost no performance overhead, so it can be used even in heavily loaded production environments.
Can we do something similar with Rust? 35
36
Let’s do a demo to see how it goes 37
Demo time 38
How does it work? 39
High level archtecture 40 Gathering Runtime Event Tokio Runtime Visualize
Log File Runtime thread Runtime thread Runtime thread
41 Runtime Event
42 Runtime Event Runtime Parking Run Task
43 Runtime Event Backtrace Task Name Duration
Visualize 44
Visualize 45
46
Tracing × Perfetto 47
48
49 Hacking Runtime Internal !
50
51
52 Trace Store backtrace
Challenges 53
Backtrace 54
55 Invoked for every task run!!
56 Backtrace • It is crucial to be able to
get backtraces efficiently, • Because the locations where traces are obtained are often hot paths in the runtime 🔥
57 🤔
58
59
60
61
62
Other Subtleties • Symbolize • When to capture a backtrace?
◦ For now, capture backtraces when a future returns Pending ◦ … but this means that we cannot capture a backtrace if that future complete at first poll 63
Trace Log 64
65
66 Trace related stuff
Can we do better? 67
68 Continuous Monitoring with JDK Flight Recorder (JFR)
69 Execution tracer overhaul
70 Trace Log • Should be optimized by e.g., ◦
Using thread local buffer ◦ Using a dedicated trace format
71
72 worker-trace.md
73 Thank you!