Video
Lecture 22 Video
Notes
In Class
Lecture 22
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What's left?
* scheduling
* device drivers
* virtual memory
- page replacement algorithms
- predict the future (optimal)
- least recently used
- one-handed, two-handed clocks
* power management
* security
- hardening processes so coding errors don't lead to vulnerabilities
(machine code injection, e.g. buffer overflow attacks)
* virtualization
- hardware-level (run multiple kernels) <-- vmware, openstack
- OS-level (run multiple userspaces) <-- containers, web hosting
- application level (run programs on simulated machines)
- JVM
- JavaScript runtime in browsers/node
* distributed operating systems