The evolution of Linux I/O from epoll to io_uring represents a significant shift in how asynchronous I/O is handled. This article explores this transition in the context of Rust, a language increasingly used for systems programming. It details the architectural differences: epoll's event-driven model versus io_uring's submission queue and completion queue approach. The author provides benchmarks and code examples demonstrating how io_uring reduces system calls and improves throughput, especially for high-I/O workloads. For Rust developers, understanding these mechanisms is crucial for building efficient network services, file systems, and databases. The article also discusses integration with Rust async runtimes like tokio and async-std.
A comprehensive comparison of epoll and io_uring in Rust async I/O, with performance analysis and practical implications.