# When Async Attacks!

Page: https://stenobird.com/podcast/oxide-and-friends-5250129/when-async-attacks
Text version: https://stenobird.com/podcast/oxide-and-friends-5250129/when-async-attacks.md
Podcast: [Oxide and Friends](https://stenobird.com/podcast/oxide-and-friends-5250129)
Published: 2025-06-27T14:00:00+00:00
Episode link: https://share.transistor.fm/s/32ca22c9
Audio file: https://media.transistor.fm/32ca22c9/e1ade1b6.mp3
Processing state: not_requested
JSON: https://stenobird.com/v1/public/podcasts/oxide-and-friends-5250129/episodes/when-async-attacks
Duration seconds: 6815

## Resource

What happens when the Oxide API is slow? A podcast episode! More specifically, one about how the team employed all manner of debugging techniques to track it down to one obscure and configurable async runtime feature! Bryan and Adam were joined by members of the team to talk about that journey and the tools we used (and made!) along the way. In addition to Bryan Cantrill and Adam Leventhal , we were joined by Oxide colleagues, Dave Pacheco , Eliza Weisman , and Augustus Mayo. Previous episodes mentioned: Oxide and the Chamber of Mysteries The Saga of Sagas DTrace at 20 Cultural Idiosyncrasies Mr. Nagle’s Wild Ride A Debugging Odyssey RTO or GTFO Some of the topics we hit on, in the order that we hit them: Falling in Love with Rust Tokio Runtime Builder – disable_lifo_slot magic‑trace (GitHub) Magic Trace podcast episode from Jane Street diesel‑dtrace (GitHub) omicron issue comment qorb statemap tokio‑dtrace tokio issue #7411 Visualizing Systems with Statemaps PostgreSQL WAL INIT ZERO Statemaps: Visualizing System Behavior (YouTube) The statemaps that we referred to: Nexus by thread , discussed starting at 55:29 . (This statemap has some states coalesced; the full version is also available.) Nexus by Tokio task, tagged by thread , discussed starting at 1:15:33 The D scripts that we referred to: nexus-statemap.d used to generate the initial statemap nexus-profile.d to understand what was consuming CPU tokio-statemap-tagged.d to generate the Tokio task statemap If we got something wrong or missed something, please file a PR! Our next show will likely be on Monday at 5p Pacific Time on our Discord server; stay tuned to our Mastodon feeds for details, or subscribe to this calendar . We'd love to have you join us, as we always love to hear from new speakers!

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## Transcript

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