Computer Science 322
Operating Systems

• Announcements
• Lab 3 due
• Lab 2 aftermath
• Discrete Event Simulation and Lab 4
  • what is a discrete event simulation?
  • groups must be formed by Wednesday
  • questions and answers
• Lecture assignment recap
• CPU Scheduling
  • Multilevel feedback queues and traditional Unix scheduling
  • What about systems with multiple CPUs?
    • scaling
    • locking issues
    • processor affinity
    • load balancing
  • Examples
    • From the text: Solaris, Win XP, Linux
    • Linux 2.6 O(1) scheduler
    • From McKusick and Neville-Neil: FreeBSD 5.x ULE scheduler

Instead, get started on your simulation labs right away.