CS 3733 Operating Systems, Fall 2002 Assignment 2 Comments

The assignment was graded on a basis of 30 points.
Parts 0 and 1 were worth 10 points together. You got 10 points for just handing in Part 1. It was not checked.
Parts 2 and 3 were 10 points each and I looked carefully at the answers you gave to the questions.

Part 2

• The load average uses the total waiting time, not the average.
• Look at the numbers you calculate to see of they make sense. If you calculated a load average of .3, most of the time the ready queue is empty and you would expect a low CPU utilization.
• No units are given for the simulation. Do not assume they are in microseconds or milliseconds.
• Make sure your Gantt charts are labeled appropriately.
• There is not much difference between a CPU utilization of 100% and one of 98%

• What is meant by a large quantum or a small quantum? These only make sense in comparison to something, like the CPU burst time.
• You need to show tables, not just the graphs. The graphs do not tell you about average waiting time.
• You cannot prove that things are always the same using a simulation.
• You can show that things are not always the same using a simulation.
• Don't use a CPU burst longer than the duration.
• Don't make your experiments too simple, with one burst per process or a very small number of processes.