Computer Science 322 Operating Systems Mount Holyoke College Spring 2008

Agenda

• Announcements
• Lab 2 due now, Lab 3 due Monday
• Exam information
  • it is a 47 hour, 10 minute take home: Monday 10:50 AM through Wednesday at 10:00 AM.
  • take as much time as you wish, but expect to spend no more than about 3 hours
  • you may consult your own notes, the SG&G text, your graded and ungraded labs and lecture assignments, class examples in the cluster shared area, any of my online lecture notes, and the assigned supplemental readings
  • you may write your answers on paper, but I would prefer typeset responses
  • topics up to the end of class today are fair game
  • old exam: see handout
• Lecture assignment recap: Dekker's Algorithm
• Bakery Algorithm wrapup
• Hadware support for process synchronization
  • atomic test-and-set
  • bounded wait using atomic test-and-set
  • using atomic swap instruction
• Semaphores
  • abstract synchronization primitive
  • wait/signal semantics

Lecture Assignment

Due at the start of class, Friday, February 29.

Turn in short answers to these questions. Please turn in a hard copy (typeset or handwritten are OK). We will discuss these questions during class, so no late submissions are accepted.

SG&G 6.3, 6.4

You need not turn in answers to the next two questions, but we will discuss them briefly in class.

SG&G 6.5, 6.6

Also, take a look at the practice exam questions handed out in class.

The reading for next time take you through SG&G Section 6.5.