Operating Systems - David Vernon

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Memory Management 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 Incoming Virtual Address 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 010 001 110 000 100 011 000 000 000 101 000 111 000 000 000 000 1 1 1 1 1 1 0 0 0 1 0 1 0 0 0 0 110 present/absent bit Internal Operation of the MMU with 16 4k pages 1 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 Copyright © 2007 David Vernon (www.vernon.eu) Outgoing physical address
Memory Management Virtual Memory – Issues with page tables » the page table can be extremely large (consider the case of a 32-bit virtual address space: how many 4k page table entries are required? What about a 64-bit space?) » The mapping must be fast (Why? A virtual-to-physical mapping must be made for every memory reference) 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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