Computer Science 330
Operating Systems

Fall 2020, Siena College

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Agenda

• Announcements
  • The next readings/activities from OS zyBook: Chapter 5, due Monday, September 28 (might be delayed)
  • dialing back the pace here in Chapter 4, making sure everyone is able to get these key topics
• Programming Project 2: CPU Scheduler Simulation [HTML] [PDF]
  • groups are formed, repositories created
  • coding due in just under a week
    • it's big but with a good design it should be manageable
    • let the data structures do the work
  • questions or clarifications?
• Let's take a quick look at the Makefiles in an example
• A few in-class exercises from OS zyBook Ch. 3.3 and 3.5
• Concurrency
  • the producer-consumer problem
  • critical sections
    • requirements: mutual exclusion, progress, bounded waiting
    • 2-process algorithms
    • n-process algorithms
  • hardware support for process synchronization
    • atomic test-and-set
    • bounded wait using atomic test-and-set
    • atomic swap instruction

Examples

• https://github.com/SienaCSISOperatingSystems/prodcons-examples