For high-performance I/O, some techniques are often used:
- poll/select/epoll/kqueue: They are the same type of system calls that support I/O multiplexing.
- libevent/libev/libuv: They are cross-platform. I think they wrap the above system calls and eventually implement event-driven.
- libaio/libeio/liburing: They provide support for asynchronous IO.
It seems that all of them can achieve high performance, and libevent/libev/libuv is probabily to be better than poll/select/epoll/kqueue in terms of ease of use and cross-platform. But both libevent/libev/libuv and libaio/libeio/liburing seem to be excellent and seem to be interchangeable.
What is the essential difference between event library and async I/O? Which one is better to use in which situation?
Thanks.
Check my other answer: io_uring in multithreaded process
io_uring is the only one who can do real async io without a threadpool.