Computer Science 330
Operating Systems

Fall 2022, Siena College

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Agenda

• Announcements
  • The next readings/activities from OS zyBook: Chapter 3, due Friday, September 23
  • See me in office hours if you have any trouble wrapping up Lab 1: Unix Setup [HTML] [PDF], no late penalties will apply
  • No class meeting on Friday this week, I will be out of town
    • please use the time slot for work on the project that's coming out today
• Looking at more of the exercises for OS zyBook Chapter 2
• Process creation in FreeBSD
• Programming Project 1: CPU Scheduler Simulation [HTML] [PDF] introduction
  • design for the fast-food restaurant DES model
  • a close look at this DES model

Examples

• In https://github.com/SienaCSISOperatingSystems/procsthreads-examples: forking, forkbomb

Terminology

• CPU state
• physical CPU
• time sharing
• virtual CPU
• process creation hierarchy
• create process function
• destroy process function
• resource control block (RCB)
• allocated resource/free resource
• request resource function
• release resource function
• scheduler function