Operating System Concepts - Chapter 6: Process Synchronization potx

... as: x-count++; if (next-count > 0) signal(next); else signal(mutex); wait(x-sem); x-count ; 6.10 Silberschatz, Galvin and Gagne ©2005 Operating System Concepts – 7 th Edition, Feb 8, 2005 Synchronization ... x.signal can be implemented as: if (x-count > 0) { next-count++; signal(x-sem); wait(next); next-count ; } 6.8 Silberschatz, Galvin and Gagne ©2005 Operating System Con...

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... Gagne ©2005 Operating System Concepts – 7 th Edition, Feb 8, 2005 Synchronization Hardware Synchronization Hardware  Many systems provide hardware support for critical section code  Uniprocessors ... Galvin and Gagne ©2005 Operating System Concepts – 7 th Edition, Feb 8, 2005 Solution to Critical-Section Problem Solution to Critical-Section Problem 1. Mutual Exclusion -...

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... 12, 2005 Chapter 1: Introduction Chapter 1: Introduction  What Operating Systems Do  Computer -System Organization  Computer -System Architecture  Operating- System Structure  Operating- System ... manner. 1.11 Silberschatz, Galvin and Gagne ©2005 Operating System Concepts – 7 th Edition, Jan 12, 2005 Computer Computer - - System Operation System Operation ...

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... of Chapter 2 End of Chapter 2 2.4 Silberschatz, Galvin and Gagne ©2005 Operating System Concepts – 7 th Edition, Jan 14, 2005 Operating System Services Operating System Services  One set of operating- system ... execution 2.8 Silberschatz, Galvin and Gagne ©2005 Operating System Concepts – 7 th Edition, Jan 14, 2005 User Operating System Interface User Operat...

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... ©2005 Operating System Concepts - 7 th Edition, Feb 7, 2006 Process Creation Process Creation  Parent process create children processes, which, in turn create other processes, forming a tree of processes  ... and Gagne ©2005 Operating System Concepts - 7 th Edition, Feb 7, 2006 Process in Memory Process in Memory 3.39 Silberschatz, Galvin and Gagne ©2005 Oper...

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... and Gagne ©2005 Operating System Concepts – 7 th edition, Jan 23, 2005 Many Many - - to to - - One Model One Model 4.15 Silberschatz, Galvin and Gagne ©2005 Operating System Concepts – 7 th edition, ... 2005 Two Two - - level Model level Model 4.8 Silberschatz, Galvin and Gagne ©2005 Operating System Concepts – 7 th edition, Jan 23, 2005 Many Many - -...

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... Galvin and Gagne ©2005 Operating System Concepts – 7 th Edition, Feb 2, 2005 Shortest Shortest - - Job Job - - First (SJF) Scheduling First (SJF) Scheduling  Associate with each process the length ... effect short process behind long process P 1 P 3 P 2 63300 5.2 Silberschatz, Galvin and Gagne ©2005 Operating System Concepts – 7 th Edition, Feb 2, 2005 Chapter...

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... 2005 Resource Resource - - Allocation Graph and Wait Allocation Graph and Wait - - for Graph for Graph Resource-Allocation Graph Corresponding wait-for graph Chapter 7: Deadlocks Chapter 7: Deadlocks ... ©2005 Operating System Concepts - 7 th Edition, Feb 14, 2005 Graph With A Cycle But No Deadlock Graph With A Cycle But No Deadlock 7.20 Silberschatz, Galvin and Gag...

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... partitions (hole) OS process 5 process 8 process 2 OS process 5 process 2 OS process 5 process 2 OS process 5 process 9 process 2 process 9 process 10 Chapter 8: Main Memory Chapter 8: Main Memory 8.11 Silberschatz, ... Gagne ©2005 Operating System Concepts – 7 th Edition, Feb 22, 2005 Paging Example Paging Example 32-byte memory and 4-byte pages 8.18 Silbers...

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... Galvin and Gagne ©2005 Operating System Concepts – 7 th Edition, Jan 1, 2005 C C - - LOOK (Cont.) LOOK (Cont.) 12.40 Silberschatz, Galvin and Gagne ©2005 Operating System Concepts – 7 th Edition, ... redundancy. 12.2 Silberschatz, Galvin and Gagne ©2005 Operating System Concepts – 7 th Edition, Jan 1, 2005 Chapter 12: Mass Chapter 12: Mass - - Storage Systems...

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