Course Information

CS 3013: Operating Systems
Time: C-Term 2015, Tuesdays and Fridays, 9:00am to 10:50am
Location: Atwater-Kent 219

Course Catalog Description

This course provides the student with an understanding of the basic components of a general-purpose operating system. Topics include processes, process management, synchronization, input/output devices and their programming, interrupts, memory management, resource allocation, and an introduction to file systems. Students will be expected to design and implement a large piece of system software in the C programming language. Undergraduate credit may not be earned both for this course and for CS 502. Recommended background: CS 2303 or CS 2301, and CS 2011.

Instructor's Description

Operating systems are present in a broad range of devices, from embedded systems to powerful supercomputers. This course is designed to help students learn more about operating systems, allowing students to know how to write applications that leverage operating system resources or for those that wish to develop operating systems themselves. The course will introduce the concepts of concurrency, abstracton, and caching. Other topics, such as file systems or networking, appear in separate courses (CS 4513 - Distributed Systems and CS 3516 - Computer Networking, respectively).

Teaching Staff

Course Instructor: Craig A. Shue, Ph.D.
Email: please post via the class discussion board
Office: Fuller Labs 236
Office Hours: Walk-ins welcome. Appointments also available, if desired.

Teaching Assistant: Mike Calder
Office: Fuller Labs A22
Office Hours: Wednesdays/Thursdays: 1:00pm - 4:00pm

Teaching Assistant: Qingyang Wang
Office: Fuller Labs A22
Office Hours: Tuesdays/Wednesdays: 6:00pm - 9:00pm

Teaching Assistant: Jason (Zhixin) Yan
Office: Fuller Labs A22
Office Hours: Mondays/Wednesdays: 9:00am - 12:00pm


We will be using the following textbooks for the course:

  1. Required: Andrew S. Tanenbaum, Modern Operating Systems. 3rd edition, Prentice Hall, 2008. ($33 used online)
  2. Recommended: Robert Love, Linux Kernel Development, 3rd edition, Addison-Wesley, 2010. ($22 used online)

A fourth edition of the Tanenbaum book is available on the market ($154 online), which has resulted in a signicant price reduction on the third edition. As a result, we will continue using the third edition until it is no longer widely available. If you are unable to locate a copy of the third edition, please let the instructor know immediately.

Students must complete readings from the Tanenbaum book before each class. A quiz at the start of class will include contents from the readings. Failure to acquire the book will likely lead to poor performance in the course.

The instructor recognizes textbooks can impose a financial burden and tries to minimize costs while maximizing the students' education. The instructor recommends Allen Downey's "The Little Book of Semaphores" (a free online textbook) as an additional resource, but notes there currently are no free equivalents of the required textbook.

Lecture Schedule and Readings

This schedule is subject to change. Any changes will be announced in class with at least one week's advance notice, when possible. All readings are out of the Tanenbaum book unless otherwise noted. All readings are due before class on the date indicated. Students are expected to have read the readings prior to arriving for class. All projects are due at 11:59:00pm on the date indicated.

Class NumberDateReading RequiredTopic
1Jan. 161Introduction to the Course
Jan. 16Project 0 Assigned
Jan. 16Project 1 Assigned
2Jan. 202.1Introduction to Concurrency, Processes
Jan. 20Project 0 Due
Jan. 21Project 1 Checkpoint
3Jan. 231.6, 2.2, 2.3System calls, Threads, Synchronization
Jan. 27Project 1 Due
Jan. 27Project 2 Assigned
5Jan. 30Introduction to Project 2
Feb. 2Project 2 Checkpoint
6Feb. 32.3Synchronization, Concurrent Applications
7Feb. 6 Concurrent Applications, Project 3
Feb. 6Project 2 Due
Feb. 6Project 3 Assigned
8Feb. 102.4, 3.1, 3.2Scheduling, Memory Management
Feb. 11Project 3 Checkpoint
9Feb. 133.1, 3.2, 3.3Memory Management
10Feb. 173.4Caching Principles and Paging
Feb. 17Project 3 Due
Feb. 17Project 4 Assigned
11Feb. 203.5-3.7Caching and Paging Performance, Virtual Memory
Feb. 23Project 4 Checkpoint
12Feb. 244.1-4.2, 5.1-5.2File Systems, Input/Output
13Feb. 275.3, 9.1, 9.3.0-9.3.3Miscellaneous Topics
Feb. 27Project 4 Due
14Mar. 39.4System Security and Protection

Course Policies and Procedures

The following represent the official policies and procedures for the course. Please review this information and discuss any questions with the professor as soon as possible.


The university-wide myWPI system is insufficient for the course's needs. Instead, we will be using InstructAssist, a custom-built course management tool created by the instructor. This system will be used for posting grades, submitting projects, obtaining slides, scheduling project demonstrations, and posting partner evaluations. It is available at InstructAssist uses a WPI SSL certificate for authenticity and encryption to protect student records.

Official Communication

Class discussion, class hand-outs, posts on the class forum, emails to the student's WPI email account, and the course Web pages are avenues for official course communication. Students are responsible for any information distributed through any of these venues.

Class Email and Forum

Students must check their WPI email daily. The instructor and TAs will use email to send urgent information to the class. Classmates collaborating on teams may also use email to coordinate efforts, so checking email periodically will be essential for timely responses.

Students should post all questions about the course on the class discussion board. The teaching staff will use the discussion board to keep track of assistance requests. Further, posts on the discussion board will be available to all students by default, allowing everyone to learn from these questions.

By default, all students will be subscribed to receive email copies of the classwide announcements sent by the teaching staff. Students may unsubscribe from non-urgent postings by adjusting their profile settings. Students are responsible for all announcements, even if they elect not to receive email copies.

If a question is of a more personal or private nature, students can choose to create a new discussion topic and select the "Visible by Invitation Only" topic privacy option. Any communication in that topic will be visible only to the Instructor, the TAs, the student creating the topic, and any individuals the student explicitly invites to the topic. This approach will allow students to have a private discussion with the staff while still allowing the staff to keep track of unresolved issues and address them in a timely fashion.

Programming Assignments

The CS Department Documentation Format should be considered when programming. In general, code must be clean and organized. It must be appropriately commented as well. During project demonstrations, students may be graded on their ability to accurately describe what a code segment does, so students are well-advised to aim for clairity in their programming.

Submissions must include a README file and a Makefile for compilation. All programs must compile and execute on the provided virtual machines. Programs that do not compile, or programs lacking commenting, will not be graded and will be assigned a score of 0.

Students must present demonstrations for each of the course projects, except Project 0. Students who fail to appear for a demonstration may earn a score of zero on the project until a demonstration is completed. During the demonstrations, students are expected to be able to explain their code and design decisions. For team projects, both partners are expected to attend the demonstration.

For students working in pairs, each student must complete a partner evaluation indicating the contributions of each team member. Failure to complete an evaluation will result in a penalty. Students who are found to not have contributed their fair portion of the assigned deliverables may face grade deductions at the discretion of the teaching staff.

Programming Languages

Students with a strong computer science background develop the ability to quickly pick up a new programming language as needed. This provides them the flexibility to adapt to changing work requirements and the ability to recognize the most efficient tool for the job. Students pick up these abilities through exposure to different programming languages, especially those that serve as the model for future languages.

In this course, we will be using the C programming language. This language is the basis of many common operating systems and network programs, with operating system APIs designed with these languages in mind. Students without experience in C will have to develop such a background while concurrently developing course projects. This is extremely challenging and prior courses have shown that students without a background in C programming generally do not perform well in CS 3013.

The C Programming Language, by Kernighan and Ritchie, (ISBN: 0-13-110362-8) is the de facto standard guide to programming in C and provides a good reference in addition to the textbooks.

Course Participation and Professionalism

During lectures, students are to be focused on the course. Students should not use materials or electronic devices that would inhibit their attention to the course lecture and discussion. Laptops may only be used for note-taking purposes; transmission capabilities on these devices must be disabled and only appropriate note-taking application may be used in class. Mobile devices, such as phones or PDAs, are not to be used in class. Significant penalities may be assessed for repeated infractions.

Students must treat each other and the teaching staff with respect at all times. Disagreement, debates, and criticism of ideas are healthy aspects of academic environments; however, students should avoid demeaning language or comments which can be taken personally. The ability to handle conflict professionally and work with a variety of people is an acquired skill, yet is increasingly important in technical careers.

Late Submission

Students will not receive credit for Project 0 if they submit it late.

Programming projects may be submitted late, but with significant penalties. Programs that are late by a certain amount of time, denoted as t, will incur the following penalties:

0 minutes < t ≤ 1 day10% deduction from maximum grade before the rest of the grading begins
1 day < t ≤ 3 days30% deduction from maximum grade before the rest of the grading begins
3 days < t ≤ 5 days50% deduction from maximum grade before the rest of the grading begins
5 days < tno credit will be awarded

Any projects submitted after 4pm on Tuesday, March 3, 2015 will not be graded. Any projects not demonstrated by 6pm on Thursday, March 5, 2015 will not be graded.

Course Grading

The course programming assignments and in-class quizes form the basis for 90% of the course grade. The remaining 10% of the course grade will be attributed to in class participation and professionalism associated with the course. Details on each of these components are as follows:

  • Quizzes (45%): There will be a 10-15 minute quiz at the beginning of each class (except for the first day). The two lowest quiz scores will automatically be dropped, allowing for absences, illnesses, or simply "bad days". The quizes will be short, typically only two questions long. The first question will cover material from reading due before class and will be more factual (and simplistic) in nature. The second question will be more application-oriented, requiring students to apply concepts from prior class discussions to new challenges. Our class will trial a digital option for completing the quiz; however, the instructor reserves the right to require a paper-based format at his discretion. Students may not access reference materials or electronic devices during quizzes, even after a student finishes his or her quiz.
  • Projects (45%): There will be multiple programming projects in the course to allow students to apply concepts. These projects may be done individually or in pairs unless otherwise indicated. Projects may have different point values and projects may have "checkpoint" deliverables in which students must show substantial progress towards completing the project.
  • Participation and Professionalism (10%): Students are expected to be engaged in class, answer questions from the instructor and asking questions when needed. Students must regularly attend classes and show up to demonstration times they schedule. Disregard for course policies or unprofessional conduct with students or the teaching staff will be penalized. This grading component is a signed value, allowing students to earn a negative score for abusive behavior.

Student Disabilities

If you need course adaptations or accommodations because of a disability, or if you have medical information that you need to share with the instructor, please make an appointment with the instructor as soon as possible. If you have not already done so, students with disabilities who believe that they may need accommodations in this class are encouraged to contact the Office of Disability Services (ODS) as soon as possible to ensure that such accommodations are implemented in a timely fashion. This office is located in the West St. House (157 West St) and their phone number is 508.831.4908.

Academic Honesty

The WPI Academic Honesty Policy describes types of academic dishonesty and requirements in documentation. We take these matters seriously. In the case of academic dishonesty, the instructor is required to report the incident to the Dean of Student Affairs. The instructor's penalty for academic dishonesty is to assign a NR grade for the course.