# io\_uring

io\_uring is a part of Linux kernel.

mmap -> share memory between user and kernel space

Memory Barrier

Submission Queue Ring: User submit entries into SQ.

Completion Queue Ring: Kernel returns results to CQ.

1. Aim to: Reduce system calls.
2. Submission Queue Ring (SQ\_Ring) and Completion Queue Ring (CQ\_Ring) are shared queues between user space and kernel space.
3. User - Submit into the Submission Queue Ring.
4. Kernel - Return results to the Completion Queue Ring.

{% embed url="<https://github.com/axboe/liburing/wiki/io_uring-and-networking-in-2023>" %}

{% embed url="<https://zhuanlan.zhihu.com/p/582318316>" %}

{% embed url="<https://github.com/0voice/kernel_new_features/tree/main/io_uring>" %}

{% embed url="<https://nan01ab.github.io/2019/05/io_uring.html>" %}

{% embed url="<https://developers.redhat.com/articles/2023/04/12/why-you-should-use-iouring-network-io>" %}

{% embed url="<https://thenewstack.io/how-io_uring-and-ebpf-will-revolutionize-programming-in-linux/>" %}

{% embed url="<https://arthurchiao.art/blog/intro-to-io-uring-zh/>" %}

{% embed url="<https://www.byteisland.com/io_uring%EF%BC%881%EF%BC%89-%E6%88%91%E4%BB%AC%E4%B8%BA%E4%BB%80%E4%B9%88%E4%BC%9A%E9%9C%80%E8%A6%81-io_uring/>" %}

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{% embed url="<https://cloud.tencent.com/developer/article/1790806>" %}

{% embed url="<https://unixism.net/loti/index.html>" %}

{% embed url="<https://unixism.net/loti/tutorial/sq_poll.html>" %}

{% embed url="<https://kernel.dk/io_uring.pdf>" %}