Journey to the End of Linux IO APIs (d…)
summary
The talk explains Linux I/O APIs evolution, comparing legacy interfaces like select/poll and epoll with the newer io_uring introduced in 2019. Using a concrete example (a socket) and source code, it shows how each API works, how they evolved, and which problems io_uring addresses.
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chapters (10)
- 0:00Introduction
- 5:20Everything is a file descriptor
- 13:07First simple blocking server
- 19:48Evolution with select and poll
- 26:25Poll scalability issues
- 30:19I/O multiplexing with epoll
- 36:12Traditional API limits
- 37:57io_uring revolution
- 46:18Performance and adoption
- 47:41Conclusion
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