Tokio is a runtime for writing reliable asynchronous applications with Rust. It provides async I/O, networking, scheduling, timers, and more.

Tokio's blog is a resource for developers working with Rust programming language and asynchronous programming frameworks. Through tutorials, code samples, and technical deep dives, Tokio offers insights into asynchronous programming patterns, concurrency models, and event-driven architectures. Readers can learn about Tokio's ecosystem of libraries and tools for building high-performance, scalable, and resilient applications. Additionally, Tokio provides updates on the latest developments in Rust language features, compiler optimizations, and community-driven initiatives to help developers stay informed and engaged in the Rust programming community.

Tokio

dial9 is a new runtime telemetry tool for Tokio that captures a full timeline of runtime events — individual polls, parks, wakes, and Linux kernel events — rather than just aggregate metrics. Built to diagnose production-only performance issues, it helped identify kernel scheduling delays of 10ms+ on an AWS service, fd_table lock contention causing 100ms+ polls during startup, and a global mutex in backtrace::trace. With under 5% overhead, it can run continuously in production. Setup requires wrapping the Tokio runtime with TracedRuntime and traces can be viewed in a browser-based viewer or stored to S3.

Introducing dial9: a flight recorder for Tokio

<p>Powerfull tool, this is a huge step for tokio, i used to be painful with asyncronization problem with crates internal issues and some qurik bugs.</p>
