Computer Science 330
Operating Systems

Fall 2022, Siena College

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Agenda

• Announcements
  • Tomorrow: faculty candidate talk here at 9 AM, please attend if you can!
  • The next readings/activities from OS zyBook: Chapter 7, due Friday, November 18
  • Lab 6: Unix Systems Programming [HTML] [PDF] wrap up soon, complete before you work on forking in the project
  • Programming Project 3: Basic Shell [HTML] [PDF] repositories should be set up by now, due Friday night
• Programming Project 3: Basic Shell [HTML] [PDF]
  • reference solution executables on noreaster in /home/cs330/basicshell
  • Q&A time
• A new shared Linux VM
• A Banker's Algorithm example
• Memory management on the Commodore 64
• Looking at (a few of) the exercises for OS zyBook Chapter 6
  • Section 6.1, we will do 1-4, look briefly at 5 and just mention 6

Terminology

• physical memory (RAM)
• physical address
• logical address space
• logical address
• source module
• object module
• load module
• static vs. dynamic relocation
• relocation register
• free-space management: first-fit, next-fit, best-fit, worst-fit
• external memory fragmentation
• swapping
• memory compaction
• linking
• sharing (of dynamic modules)
• paging
• page, page frame
• page table
• internal fragmentation
• segmentation
• segment
• segment table
• translation lookaside buffer
• principle of locality
• TLB hit ratio