In-class notes for 10/21/2019 (CS 273 (OS), Fall 2019)

In-class notes for 10/21/2019

CS 273 (OS), Fall 2019

HW9, due Wednesday
Web server project
- Overview of steps .
- Due date postponed to Saturday 11/9
- submit team form
- Log your time (per person), within 24 hours

Memory management overview

Swapping.
- Hole management
Paging (virtual memory).
- Terms; virtual address translation
- TLB
- Page replacement algorithms
Exercise (at the board)

Assume 8 page frames, two processes with pages A1, A2, ... and B1, B2, ...
How many page faults are needed for
```
A1    A2    A3    A4    A1    A2    A3    A4  
  \  /  \  /  \  /  \  /  \  /  \  /  \  /  \
   B1    B2    B1    B3    B1    B4    B1    B2
```
for FIFO? For NRU? (here, boldface indicates modification of a page)

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