Operating Systems Projects – Spring 2025

👥 Team Members

Miracle Emefiele
Laura Zapata

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📄 Project 1: Process Scheduling Simulation

📋 Overview

This project simulates how an Operating System schedules processes using different CPU scheduling algorithms.

Algorithms Implemented:

• First-Come, First-Served (FCFS)
• Round Robin (RR)

Process Format Includes:

• Process ID (PID)
• Arrival Time
• Burst Time
• Priority

The Simulation:

• Displays the Gantt Chart showing execution order
• Calculates Waiting Time (WT) and Turnaround Time (TAT)
• Computes average WT and TAT

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🗂️ Files for Project 1 (C)

• main.c: Reads processes.txt, schedules processes using FCFS and RR
• fcfs.c: Implementation of FCFS
• rr.c: Implementation of Round Robin
• processes.txt: Input file listing all processes
• processes.h: Shared structure and function declarations
• report_project1.pdf: Final report

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How to Compile and Run Project 1

gcc main.c fcfs.c rr.c processes.c -o scheduler
./scheduler

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🧵 Project 2: Thread-Based Process Simulation and Synchronization

📋 Overview

This project simulates real-time process execution using threads and solves the Producer-Consumer synchronization problem using Java threads, semaphores, and synchronized buffer access.

Each process becomes a thread, and CPU burst times are simulated using Thread.sleep().

Producer-Consumer Behavior:

• Producers add processes to a bounded buffer
• Consumers remove and execute processes while ensuring thread-safe access

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🗂️ Files for Project 2 (Java)

• Simulator.java: Main driver class that manages producer and consumer threads
• ProcessThread.java: Thread class representing a process with PID and burst time
• processes.txt: Optional input file (can be hardcoded)
• report_project2.docx: Final report for Project 2

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🛠️ How to Compile and Run Project 2

Inside the os_project2/ folder:

javac Simulator.java ProcessThread.java
java Simulator

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🔍 Sample Outputs

Project 1 – Gantt Chart Example

| P1 | P2 | P3 | P4 |
0    2    5    7    12

Project 2 – Producer-Consumer Example

[Producer] Waiting for buffer space...
[Producer] Added Process 2
[Consumer] Retrieved Process 2
[Process 2] started.
[Process 2] finished.

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📁 Folder Structure

Operating-systems-project/
├── Project1/
│   ├── fcfs.c
│   ├── rr.c
│   ├── main.c
│   ├── processes.c
│   ├── processes.h
│   ├── processes.txt
│   └── report_project1.pdf
│
├── os_project2/
│   ├── Simulator.java
│   ├── ProcessThread.java
│   ├── processes.txt
│   └── report_project2.docx
│
└── README.md

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📌 Notes

• Project 1 written in C
• Project 2 implemented in Java
• Project 2 uses Java Semaphores, Threads, and proper synchronization
• Designed and tested in VS Code and standard terminal
• Modular and organized structure for easy grading and extension

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