Code used in class

This folder holds the code examples, demonstrations and simulators used in lectures and labs. Many come from the textbook’s ostep-code and ostep-homework repositories. Browse the files on GitHub.

Processes

Process API: fork_demo_*.c, exec_demo_*.c, wait_demo_*.c
Process creation: p1.c, p2.c, p3.c, p4.c
Hello world programs: hello.c, hello_world.c, hello_assembly.c

CPU scheduling

Scheduling simulator: scheduler.py, cpu-virtual.py
MLFQ: mlfq.py
Lottery scheduling: cpu-sched-lottery/lottery.c

Memory

Memory examples: mem.c, mem2.c, mem3.c
Address translation: memory-address.c
Virtual memory: vm-intro/va.c
Memory simulation: relocation.py

Threads and concurrency

Thread examples: hello_thread.c, sum_thread.c
Thread API: threads-intro/
Synchronisation: code in the lab folders

I/O and system calls

I/O examples: io.c
System call tracing: trace-io.*

Python simulators

CPU scheduling: scheduler.py
Memory management: relocation.py, x86.py
Process execution: process-run.py

Assembly

Assembly code: hello_world.s, loop.s, simple-race.s
Threading: looping-race-nolock.s

How to use

Compilation: Most C programs can be compiled with gcc filename.c -o filename
Python scripts: Run with python3 script.py
Makefiles: Use make in directories that contain Makefiles
Threading: Compile with -pthread flag for threading examples

Common headers

common.h: Shared definitions and includes
common_threads.h: Threading-specific includes

Subfolders

Subfolders from the textbook’s code: - intro/: Introduction examples - cpu-api/: Process API exercises - threads-intro/: Threading introduction - vm-intro/: Virtual memory introduction

Contents