io_uring
Linux 5.1内核引入的高性能异步I/O接口，逐步向Proactor语义靠拢，提供比epoll更高效的异步I/O能力
Timeline (last 90 days)
A team that built a query engine in Rust found that system performance actually became slower after replacing the traditional MMAP solution with io_uring.
io_uring is an asynchronous I/O framework introduced in Linux 5.1.
io_uring implements batch I/O communication between user space and kernel space via two ring buffers: the submission queue (SQ) and the completion queue (CQ).
The performance advantage of io_uring is built on a model of batch submission and asynchronous completion, making it best suited for handling a large number of concurrent I/O requests simultaneously.
When the query engine's access pattern consists of relatively random, small-batch reads, io_uring's batch processing advantage cannot be leveraged and instead introduces additional overhead.
Using io_uring typically requires pre-allocating read buffers, which may introduce additional memory allocation and data copy costs.
All Facts (6)
A team that built a query engine in Rust found that system performance actually became slower after replacing the traditional MMAP solution with io_uring.
50%Unverifiedio_uring is an asynchronous I/O framework introduced in Linux 5.1.
50%Unverifiedio_uring implements batch I/O communication between user space and kernel space via two ring buffers: the submission queue (SQ) and the completion queue (CQ).
50%UnverifiedThe performance advantage of io_uring is built on a model of batch submission and asynchronous completion, making it best suited for handling a large number of concurrent I/O requests simultaneously.
50%UnverifiedWhen the query engine's access pattern consists of relatively random, small-batch reads, io_uring's batch processing advantage cannot be leveraged and instead introduces additional overhead.
50%UnverifiedUsing io_uring typically requires pre-allocating read buffers, which may introduce additional memory allocation and data copy costs.
50%