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Context-Switching

A multithreaded simulation of the process switching mechanism in operating systems. This was my project in "Operating Systems" course.

Simulation of the process switching mechanism with custom instruction set. The context of the processes was saved enabling processes to resume execution from the last saved state.

Usage:

  1. Open bash and type in the commands specified below.

  2. These commands should be typed without double quotes.

    gcc -pthread -o "executable_name" launchMain.c
    ./"executable_name"

Description of files:

  1. opcode.txt - Each line contains the operation code and is integer representation separated by a space.
  2. variables.txt - Each line contains the name of the variable and its current value.
  3. processes/filein_(1/2/3/4/5).txt - Each file contains a set of instructions.
    The instruction format is as follows:
    opcode operand1 operand2 result_variable

Results: Based on the option chosen by you during the execution of "launchMain.c", logs will be stored in in 2 different files.

  1. Implementation with threads -> logs_rr_with_thread
  2. Implementation without threads -> logs_rr_without_thread

For more information about the project, please refer to the document 'OS_Project_Context_Switching.pdf'.