'Valid invalid bit' diaporamas de présentation

Chapter 9 Virtual Memory

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Chapter 9 Virtual Memory

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Lecture 9 Virtual Memory (chapter 9)

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Chapter 9 Virtual Memory

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Chapter 9: Virtual Memory

Chapter 9: Virtual Memory. Chapter 9: Virtual Memory. Background Demand Paging Copy-on-Write Page Replacement Allocation of Frames Thrashing Memory-Mapped Files Allocating Kernel Memory Other Considerations Operating-System Examples. Objectives.

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Chapter 9: Virtual Memory

Chapter 9: Virtual Memory. Chapter 9: Virtual Memory. Background Demand Paging Copy-on-Write Page Replacement Allocation of Frames Thrashing Memory-Mapped Files Allocating Kernel Memory Other Considerations Operating-System Examples. Objectives.

931 views • 74 slides

Chapter 9: Virtual Memory

Chapter 9: Virtual Memory. Chapter 9: Virtual Memory. Background Demand Paging Copy-on-Write Page Replacement Allocation of Frames Thrashing Memory-Mapped Files Allocating Kernel Memory Other Considerations Operating-System Examples. Objectives.

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Objectives

Objectives. Chapter 9: Virtual-Memory Management. To describe the benefits of a virtual memory system To explain the concepts of demand paging , page-replacement algorithms , and allocation of page frame To discuss the principle of the working-set model.

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Memory Management

Memory Management. Background Logical versus Physical Address Space Swapping Contiguous Allocation Virtual memory Management Paging Background Implementation of Paging Demand Paging Page-Replacement Algorithms Thrashing Segmentation Segmentation with Paging. Background.

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Chapter 9: Virtual Memory

Chapter 9: Virtual Memory. Chapter 9: Virtual Memory. Background Demand Paging Copy-on-Write Page Replacement Allocation of Frames Thrashing. Objectives. To describe the benefits of a virtual memory system

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Chapter 9: Virtual Memory

Chapter 9: Virtual Memory. Objectives. To describe the benefits of a virtual memory system To explain the concepts of demand paging, page-replacement algorithms, and allocation of page frames To discuss the principle of the working-set model. Background.

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Chapter 9: Virtual Memory

Chapter 9: Virtual Memory. Chapter 9: Virtual Memory. Background Demand Paging Copy-on-Write Page Replacement Allocation of Frames Thrashing Operating-System Examples. Objectives. To describe the benefits of a virtual memory system

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Virtual Memory

Virtual Memory. OSC: Chapter 9. Demand Paging Copy-on-Write Page Replacement Allocation of Frames. Virtual Memory can be Larger Than Physical Memory. Shared Library Using Virtual Memory. Demand Paging. Bring a page into memory only when it is needed Less I/O needed Less memory needed

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Chapter 10: Virtual Memory

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Virtual Memory

576 views • 40 slides

Chapter 9: Virtual Memory

Chapter 9: Virtual Memory. Chapter 9: Virtual Memory. Background Demand Paging Copy-on-Write Page Replacement Allocation of Frames Thrashing Memory-Mapped Files Allocating Kernel Memory Other Considerations Operating-System Examples. Objectives.

541 views • 38 slides

CGS 3763 Operating Systems Concepts Spring 2013

CGS 3763 Operating Systems Concepts Spring 2013. Dan C. Marinescu Office: HEC 304 Office hours: M- Wd 11:30 - 12:30 A M. Last time: Page replacement algorithms Implementation of paging Hit and miss ratios Performance penalties Today Performance penalties

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CGS 3763 Operating Systems Concepts Spring 2013

CGS 3763 Operating Systems Concepts Spring 2013. Dan C. Marinescu Office: HEC 304 Office hours: M- Wd 11:30 - 12:30 A M. Last time: Page replacement algorithms Implementation of paging Hit and miss ratios Performance penalties Today Performance penalties

390 views • 25 slides

Chapter 10: Virtual Memory

Chapter 10: Virtual Memory. Background Demand Paging Page Replacement Allocation of Frames Thrashing Operating System Example. Virtual memory. separation of logical memory from physical memory only part of the program must be in memory for execution

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Practice Seven

Practice Seven. Chapter night. 1. Under what circumstances do page faults occur? Describe the actions taken by the operating system when a page fault occurs. Answer : A page fault occurs when an access to a page that has not been

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