Computer Science 432 Operating Systems Williams College Fall 2006

Agenda

• Announcements
  • CS Colloquium this week - CS students discuss their summer work. TCL 206 Friday 2:30.
  • I may have to cut office hours short on Friday, but I'll be there earlier.
• Lab 1 continues. You should know how to do it all today.
• More on Processes
  • fork(2)
  • Shared Memory
• Threads
  • Thread concept
  • POSIX threads

Lecture Assignment

Due at the start of class, Tuesday, September 19.

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 on Tuesday, so no late submissions are accepted.

SG&G 4.3, 4.5.

The readings for next time are in SG&G Sections 5.1-5.3.

Examples

• forking
• forkbomb
• FreeBSD fork code: /usr/src/sys/kern/kern_fork.c
• FreeBSD run/ready queues: /usr/src/sys/kern/kern_switch.c
• FreeBSD context switch: /usr/src/sys/i386/i386/swtch.s