Yalnix Operating System

Last updated on Sep 2020
Yudai Chen

  • Yalnix OS is a Unix-like Operating System for RCS421 simulated hardware and X11 Windows System, including both kernel and file system with all basic functionalities such as memory management, interrupt handling, context switching and I/O handling.

  • Achieved a process scheduler based on Round-Robin algorithm to support multiple processes with content switch and kernel/user mode protection, supporting multiple C programs loaded-in and executed concurrently.

  • Implemented memory management using virtual memory and single-level page table (as well as TLB), supporting both static and dynamic memory allocation in user processes.

  • Implemented system calls including Fork, Wait, Exec, Sleep, Brk, Open/Close, Read/Write, Link, MkDir, ChDir, TtyRead, etc.

  • Created a terminal device driver, supporting keyboard input, multiple virtual monitors and multiple processes access.

  • Built a file system based on demand paging with an LRU cache, supporting multiple users running on top of the Yalnix kernel, supporting large file storage using indirect inodes.

Yudai Chen
Yudai Chen
Master’s Student at Rice University, former ZJUer

I obtained my Bachelor of Engineering degree in Computer Science from Chu Kochen Honors College of Zhejiang University in July 2019. Currently I’m a master’s student majoring in Computer Science at Rice University. My interests include web development(mainly backend), distributed system, cloud computing, high performance computing, and infrastructure.