Agenda

• Announcements
  • CS Colloquium Friday at 2:30.
• Administrative Stuff
  • lecture and reading schedule
  • SG&G web site
  • C/Unix review?
  • course expectations
• A Bit More History
  • Time sharing systems
  • PCs
  • Today's multiuser workstation/PCs
  • Parallel and distributed systems
  • Real-time systems
  • Handheld systems
• Processes
  • What is a process?
  • Process states
  • Process Control Block, context switching
  • Process creation, fork() system call

Assignment

Lab 1 due Feb. 17.

Examples

Many examples will be placed in /home/faculty/terescoj/shared/cs432/examples on the Unix lab systems.

• FreeBSD Process Control Block: see /usr/src/sys/sys/proc.h (line 125) and /usr/src/sys/sys/user.h (line 102) for architecture-independent parts of the structure, /usr/src/sys/i386/pcb.h for the i386-specific parts.
• forking
• forkbomb
• FreeBSD fork code: /usr/src/sys/kern/kern_fork.c