PPT Slide
“Ancient” Memory Sharing Techniques
- Swapping: move the entire address space of a program to disk, load up another program, repeat.
- Figure 11.18.
- Program speeds approximate disk speeds as swapping increases.
- Suitable for interactive response, assuming disk drives and O/S response is quick enough.
- Not terribly efficient, however!
- Famous book quote: User needs are the primary concern in designing what operating system services to offer. Efficiency is the primary concern in designing how to implement operating system services.