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Operating Systems CSE 411

Operating Systems CSE 411

Operating Systems CSE 411. CPU Management Oct. 9 2006 - Lecture 13 Instructor: Bhuvan Urgaonkar. CPU Management. Last class Synchronization problem in concurrent programs Cause: Concurrent access to shared data Solution: Protect shared data using Critical Sections

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644 views • 38 slides
Chapter 6: Process Synchronization

Chapter 6: Process Synchronization

Chapter 6: Process Synchronization. Module 6: Process Synchronization. Background The Critical-Section Problem Synchronization Hardware Semaphores Classic Problems of Synchronization Synchronization Examples. Background. Concurrent access to shared data may result in data inconsistency

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371 views • 36 slides
Operating Systems CSE 411

Operating Systems CSE 411

Operating Systems CSE 411. CPU Management Oct. 13 2006 - Lecture 14 Instructor: Bhuvan Urgaonkar. Some announcements. Will discuss Exam 1 on Monday Hopefully also hand-out the graded exam The question on Quiz 4 comparing RR and PS has puzzled many Has been removed

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343 views • 34 slides
Process Synchronization

Process Synchronization

Process Synchronization. Notice: The slides for this lecture have been largely based on those accompanying the textbook Operating Systems Concepts with Java , by Silberschatz, Galvin, and Gagne (2003). Many, if not all, the illustrations contained in this presentation come from this source.

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177 views • 17 slides
Semaphores

Semaphores

Semaphores. CSCI 444/544 Operating Systems Fall 2008. Agenda. What is semaphore? Two basic operations Two types of semaphores Usage of semaphores Semaphore implementation Producer/consumer problem. Background. Semaphore = a synchronization primitive

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313 views • 16 slides
Process Synchronization

Process Synchronization

Process Synchronization. Notice: The slides for this lecture have been largely based on those accompanying the textbook Operating Systems Concepts with Java , by Silberschatz, Galvin, and Gagne (2007). Many, if not all, the illustrations contained in this presentation come from this source.

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155 views • 15 slides
Lecture 2 Part 2 Process Synchronization

Lecture 2 Part 2 Process Synchronization

Lecture 2 Part 2 Process Synchronization. Background. Processes can execute concurrently May be interrupted at any time, partially completing execution Concurrent access to shared data may result in data inconsistency

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156 views • 15 slides
Disable/Enable Interrupts

Disable/Enable Interrupts

Disable/Enable Interrupts. Disable_interrupts(); <<< critical section >>> Enable_interrupts();. Test-and-Set. TS (<mem loc>) { if (<memloc> == 0) { <mem loc> = 1; return 0; } else { return 1; }. Mutex: Spin Lock.

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238 views • 10 slides

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