/Teaching/System Level Programming/Assignments/A3

Task: Memory Layout and Demand Paging


In this assignment we want to analyze memory layout and behavior of 32bit and 64bit programs (if in doubt: gcc/ g++  8 on a recent (default configured) 64bit Ubuntu Linux, binary compiled with -m32/-m64). All questions refer to 64bit systems, not 32bit systems.

We will examine differences in the behavior of the following groups of variables:

  1. Global variables (variables allocated in a global scope)
  2. Local variables (variables allocated in different threads)
  3. Static variables (variables allocated in with the static keyword)
  4. “Malloc variables” (variables allocated in with malloc)
  5. “Shared memory variables” (variables allocated in shared memory)

In order to get points on this assignment, you have to answer questions and participate in one of the discussion sessions.

Your tasks:

  • Log in to SNP Test System and go to the Questionnaire Page
  • Write short programs to answer the questions.
    • Add these programs/notes/bash commands to your repo in folder A3.
    • We will not check these programs/notes/bash commands, if they are not there, we do not care, BUT in the exercise interview you will have to demonstrate how to run one of the experiments. Worst case: you have to live-implement it within the short exercise interview. Also, if we suspect plagiarism, these files can be your defense.
    • The questions are unrestricted multiple choice. That is, any number of choices from zero to all can be correct.
    • Make sure only to submit answers you can explain.
    • Tag your submission A3 before the deadline.
  • Register and participate in one of the discussion sessions
    • The discussions will take place in person in small groups (if the situation permits)
    • We will discuss the questions and solutions from the questionnaire
    • Everyone has to give valuable contributions to the discussion to get points on the questionnaire
    • Insufficient or no contributions at all will lead to point deductions on your final A3 points
  • Final Points: Points earned in the questionnaire +/- points from the discussion session

Assignment Tutor

If you have any questions regarding this assignment, try Discord first and slp@iaik.tugraz.at second. If you have a more direct question regarding your specific solution, you can also ask the tutor who organizes this assignment:

Mathias Oberhuber, mathias.oberhuber@student.tugraz.at
Mario Bischof, mario.bischof@student.tugraz.at