Operating Systems - David Vernon

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Memory Management Virtual Memory – Page Replacement Algorithms » The Least Recently Used (LRU) Page Replacement Algorithm Remove the page that has been unused for the longest time Expensive (in cost) to implement in hardware Expensive (in time) to simulate in software Copyright © 2007 David Vernon (www.vernon.eu)
Memory Management Segmentation – The virtual memory systems discussed so far are 1-Dimensional and linear with a single virtual address space – Such a system requires the programmer to manage the allocation of memory effectively, especially if dealing with large arrays (tables) – Segmentation provides a very general alternative Copyright © 2007 David Vernon (www.vernon.eu)
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Operating Systems David Vernon Copy
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Course Content Historical overview
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Course Content Device management -
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Course Content Networking issues -
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Course Textbook “Modern Operating
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Assessment of Performance First exa
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The Need for Operating Systems Why
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The Need for Operating Systems Comp
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The Need for Operating Systems Exam
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Load B DR ← M(AR) A B C 11111111
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Load B Increment PC A B C 11111111
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Load B AR ← DR(address) A B C 111
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Load B AC ← DR A B 11111111 01001
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The Need for Operating Systems Mach
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What is an Operating System There a
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What is an Operating System OS as a
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History of Operating Systems First
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History of Operating Systems Second
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History of Operating Systems Third
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History of Operating Systems Third
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History of Operating Systems Fourth
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Operating System Concepts System ca
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Operating System Concepts Processes
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Operating System Concepts Files - O
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Operating System Concepts Copyright
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Operating System Concepts Files -Pr
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Operating System Concepts Files - O
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Operating System Concepts System Ca
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Operating System Concepts The Shell
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Operating System Structure Monolith
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Operating System Structure Monolith
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Operating System Structure Virtual
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Operating System Structure Virtual
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Operating System Structure Client-S
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Operating System Structure Client-S
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Processes All modern computer syste
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Processes Single program counter Fo
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Processes Because the OS schedules
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Processes Process Hierarchies - pro
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Processes Running 1 Blocked 4 3 2 R
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Processes Device I/O … the differ
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Processes Interrupts and device I/
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Processes InterProcess Communicatio
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Processes Process A Spooler directo
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Processes Process A Process B Print
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Processes /* process 0 */ main () {
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while (turn == process && intereste
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while (turn == process && intereste
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Processes void consumer(void) { int
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Processes #include “prototypes.h
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Processes void consumer(void) { int
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Processes void writer(void) { while
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Processes Process Scheduling - Crit
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Processes Process Scheduling - Roun
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Processes Process Scheduling - Prio
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Processes Process Scheduling - ‘S
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Page 173 and 174: Memory Management The part of the o
Page 175 and 176: Memory Management Memory management
Page 181 and 182: Memory Management Swapping - memory
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Page 191 and 192: Memory Management Disk Page 1 Proce
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Operating Systems - David Vernon

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