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iouring-tutorial

This is my tutorial of io_uring.

The explanation of this repository is in my private slides.

Requirements

OS: Ubuntu 20.04.1 LTS Kernel: Linux 5.11+

  • Other tools
    • liburing
    • bpftrace

partX.c

  1. Reads random bytes and writes it out as files.
  2. Submits multiple SQEs at once.
  3. Pre-register fds.
  4. Enabling the SQPOLL feature.

How to use

Executes make to build binaries.

$ make
gcc -Wall -o ./bin/part1 part1.c -luring
gcc -Wall -o ./bin/part2 part2.c -luring
gcc -Wall -o ./bin/part3 part3.c -luring
gcc -Wall -o ./bin/part4 part4.c -luring

Executes bpftrace program.

$ ./tools/uring_syscalls.bt

Executes binary.

$ ./bin/part1 -o /path/to/outdir -s 256 -c 10 # writes 10 files to /path/to/outdir (256 bytes per file)