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• Simple Memory Manager Round Robin Scheduler Simulation *

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Overview:

This C program simulates a simplified computer system with a Round Robin scheduler. The system loads multiple programs from a program list file into memory and schedules their execution using the Round Robin algorithm. The program components include CPU, memory, disk, smm{Simple memory manager } and a scheduler. This code provides a basic memory management system for a simple operating system or simulation environment. It's designed to handle memory allocation and deallocation for multiple processes. The First-Fit algorithm is used to find suitable holes for memory allocation. The code includes functionality to print the allocation table and the list of holes for debugging purposes. Components:

1. cpu.c and cpu.h: Simulate the CPU of the computer, including registers and operations.

2. memory.c and memory.h: Simulate the physical memory of the computer as a 2D array.

3. disk.c and disk.h: Manage loading programs into memory and translating them into instructions from a program list file.

4. scheduler.c and scheduler.h: Implement the Round Robin scheduler, manage the ready queue, and perform context switching.

5. smm.c and smm.h : Implement a simple memory manager that acts as an interface to the memory in the system. Any process has to communicate with smm for any memory requirements before it can be allowed to run. Any process that reads or writes outside its memory boundary is rejected by smm and access violation issued

6. main.c: The main driver program that initializes components, loads programs, and drives CPU clock cycles and scheduling.

Usage:

1. Compile the program on the UTD Giant Server using the GCC compiler. Example command:

gcc -o smm_scheduler_simulator cpu.c memory.c disk.c scheduler.c smm.c main.c -lm

or use makefile to compile the program. type make on the terminal

make

2. Run the compiled program with the program list file as a command-line argument. Example command:

./smm_scheduler_simulator program_list.txt ./smm_scheduler_simulator program_invalid_allocation.txt ./smm_scheduler_simulator program_invalid_access.txt

3. The program will load the specified programs into memory, run CPU clock cycles, manages the memory , executes instructions and exits gracefully printing the number of holes and locations 30, 150 and 230

Program List File Format:

The program list file contains a list of integers and filenames for instruction set programs that will be loaded into memory. Each row in the list has two arguments separated by a space: the position in memory where the program will be loaded and the filename containing the instructions.

Example program list file:

30 program_add.txt 200 program_if.txt 95 program_add.txt

Notes:

• The Round Robin scheduler uses a time quantum of 10 clock cycles (configurable in scheduler.c).

• Processes are created and added to the ready queue based on the program list.

• The program will continue executing until there are no more processes in the ready queue.

• cpu.c

• cpu.h

• memory.c

• memory.h

• disk.c

• disk.h

• scheduler.c

• scheduler.h

• smm.c

• smm.h

• main.c

• program_list.txt (Include a sample program list file)

• ReadMe.txt (This document)

• Makefile