Содержание
- 2. 1: Operating Systems Overview WHAT IS AN OPERATING SYSTEM? An interface between users and hardware -
- 3. 1: Operating Systems Overview OPERATING SYSTEM OVERVIEW The Layers Of A System Program Interface Humans User
- 4. 1: Operating Systems Overview A mechanism for scheduling jobs or processes. Scheduling can be as simple
- 5. 1: Operating Systems Overview The CPU is wasted if a job waits for I/O. This leads
- 6. 1: Operating Systems Overview Other Characteristics include: Time Sharing - multiprogramming environment that's also interactive. Multiprocessing
- 7. 1: Operating Systems Overview OPERATING SYSTEM OVERVIEW Characteristics Interrupts: Interrupt transfers control to the interrupt service
- 8. 1: Operating Systems Overview OPERATING SYSTEM OVERVIEW Hardware Support These are the devices that make up
- 9. 1: Operating Systems Overview OPERATING SYSTEM OVERVIEW Hardware Support Sequence of events for processing an IO
- 10. 1: Operating Systems Overview OPERATING SYSTEM OVERVIEW Hardware Support This is O.S. Bookkeeping. These structures are
- 11. 1: Operating Systems Overview Very fast storage is very expensive. So the Operating System manages a
- 12. 1: Operating Systems Overview Performance: OPERATING SYSTEM OVERVIEW Storage Hierarchy
- 13. 1: Operating Systems Overview Caching: Important principle, performed at many levels in a computer (in hardware,
- 14. 1: Operating Systems Overview The goal is protecting the Operating System and others from malicious or
- 15. 1: Operating Systems Overview Memory A user program can only access its own logical memory. For
- 16. 1: Operating Systems Overview CPU A clock prevents programs from using all the CPU time. This
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