'Page table entry' presentation slideshows

Virtual Memory

Virtual Memory. Chapter 8. Process Execution. The OS brings into main memory only a few pieces of the program (including its starting point) Each page/segment table entry has a present bit that is set only if the corresponding piece is in main memory

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Virtual Memory

Virtual Memory. Fred Kuhns (fredk@arl.wustl.edu, http://www.arl.wustl.edu/~fredk) Department of Computer Science and Engineering Washington University in St. Louis. Virtual Memory - A Preview. Application is allocated a large virtual address space.

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Advanced Operating Systems

Advanced Operating Systems. IV. Prof. Muhammad Saeed. Memory Management -1. Memory Management. Basic memory management Swapping Virtual memory Page replacement algorithms Modeling page replacement algorithms Design issues for paging systems Implementation issues Segmentation.

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$31,600 for an atari 2600 video game?

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Address Translation

Address Translation. Tore Larsen Material developed by: Kai Li , Princeton University. Topics. Virtual memory Virtualization Protection Address translation Base and bound Segmentation Paging Translation look-ahead buffer (TLB). The Big Picture. Memory is fast but expensive

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x86 segmentation, page tables, and interrupts

x86 segmentation, page tables, and interrupts. 3/17/08 Frans Kaashoek MIT kaashoek@mit.edu. Outline. Enforcing modularity with virtualization Virtualize processor and memory x86 mechanism for virtualization Segmentation User and kernel mode Page tables System calls.

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CSCC69: Operating Systems

CSCC69: Operating Systems. Assignment 2 Some slides are borrowed from CSCC69 offered in winter 2012. Virtual Memory. Allowing a program to be designed as though there is only one kind of memory, "virtual" memory, which behaves like directly addressable read/write memory (RAM) .

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Pintos Project #3 Virtual Memory

Pintos Project #3 Virtual Memory. CS3204: Operating System Xiaomo Liu Fall 2007. Outline. Virtual memory concept Current pintos memory management Task Lazy load Stack growth File memory mapping Swapping Suggestion How to start Implementation order. Virtual Memory Concept.

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Pintos Project #3 Virtual Memory

Pintos Project #3 Virtual Memory. CS3204: Operating System Xiaomo Liu (slightly edited by W McQuain) Spring 2008. Outline. Virtual memory concept Current pintos memory management Task Lazy load Stack growth File memory mapping Swapping Suggestion How to start Implementation order.

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Pintos Project #3 Virtual Memory

Pintos Project #3 Virtual Memory. CS3204: Operating System Xiaomo Liu Fall 2007. Outline. Virtual memory concept Current pintos memory management Task Lazy load Stack growth File memory mapping Swapping Suggestion How to start Implementation order. Virtual Memory Concept.

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Paging & Segmentation

? 11 ? : Paging ? Segmentation. Paging & Segmentation. ????? ??? ?. Swapping Overlay ??? ????. ????. ???? A. ???? B. ???? C. ? ?? List. MMU CPU ?? Memory ? ?? ??? ????. memory. CPU ? ?? ??? MMU ? ?? (Memory Management Unit). Add 10, 20 10 : 100 20 : 330 Jump 30

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Virtual Memory

Virtual Memory. Adapted from lecture notes of Dr. Patterson and Dr. Kubiatowicz of UC Berkeley. {. Thus far. {. Next: Virtual Memory. View of Memory Hierarchies. Regs. Upper Level. Instr. Operands. Faster. Cache. Blocks. L2 Cache. Blocks. Memory. Pages. Disk. Files. Larger.

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Pintos Project #3 Virtual Memory

Pintos Project #3 Virtual Memory. CS3204: Operating Systems Spring 2009 Project 3 Help Session. The following slides were created by Xiaomo Liu and others for CS 3204 Fall 2007. And Modified by Nick Ryan for Spring 2009. Outline. Virtual memory concept Current pintos memory management

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Memory Management Policies: UNIX

Memory Management Policies: UNIX. Topics. Allocating swap space Freeing swap space Swapping Demand paging. Chapter 9. THE DESIGN OF THE UNIX OPERATING SYSTEM Maurice J. bach Prentice Hall. Memory.

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CA406

CA406. Computer Architecture Memory Management Units. Memory Management Unit. Physical and Virtual Memory Physical memory presents a flat address space Addresses 0 to 2 p -1 p = number of bits in an address word User programs accessing this space Conflicts in multi-user (eg Unix)

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EEE 435 Principles of Operating Systems

EEE 435 Principles of Operating Systems. Page Replacement Algorithms Pt I (Modern Operating Systems 4.4). Quick Review. What is the problem that multi-level page tables solve? In a TLB, what kind of memory is required to look up the page frame of a physical address quickly?

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Translation Look-Aside Buffers

Translation Look-Aside Buffers. TLBs usually small, typically 128 - 256 entries Like any other cache, the TLB can be fully associative, set associative, or direct mapped. hit. PA. miss. VA. TLB Lookup. Cache. Main Memory. Processor. miss. hit. Trans- lation. data. PA. VA. TLB.

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Overview

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