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Memory Management

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MEMORY MANAGEMENT 4.1 Basic memory management 4.2 Swapping 4.3 Virtual memory 4.4 Page replacement algorithms 4.5 Modeling page replacement algorithms 4.6 Design issues for paging systems 4.7 Implementation issues 4.8 Segmentation
MEMORY MANAGEMENT ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
BASIC MEMORY MANAGEMENT MONOPROGRAMMING WITHOUT SWAPPING OR PAGING ,[object Object],[object Object]
MULTIPROGRAMMING WITH FIXED PARTITIONS ,[object Object],[object Object],[object Object]
MODELING MULTIPROGRAMMING ,[object Object],Degree of multiprogramming
ANALYSIS OF MULTIPROGRAMMING SYSTEM PERFORMANCE ,[object Object],[object Object],[object Object],[object Object]
RELOCATION AND PROTECTION ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
SWAPPING (1) ,[object Object],[object Object],[object Object],[object Object]
SWAPPING (2) ,[object Object],[object Object]
MEMORY MANAGEMENT WITH BIT MAPS ,[object Object],[object Object],[object Object],[object Object],[object Object]
MEMORY MANAGEMENT WITH LINKED LISTS ,[object Object]
VIRTUAL MEMORY PAGING (1) ,[object Object]
PAGING (2) ,[object Object]
PAGE TABLES (1) ,[object Object]
PAGE TABLES (2) ,[object Object],[object Object],Second-level page tables Top-level page table
PAGE TABLES (3) ,[object Object]
TLBS – TRANSLATION LOOKASIDE BUFFERS ,[object Object]
INVERTED PAGE TABLES ,[object Object]
PAGE REPLACEMENT ALGORITHMS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
OPTIMAL PAGE REPLACEMENT ALGORITHM ,[object Object],[object Object],[object Object],[object Object],[object Object]
NOT RECENTLY USED PAGE REPLACEMENT ALGORITHM ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
FIFO PAGE REPLACEMENT ALGORITHM ,[object Object],[object Object],[object Object],[object Object],[object Object]
SECOND CHANCE PAGE REPLACEMENT ALGORITHM ,[object Object],[object Object],[object Object]
THE CLOCK PAGE REPLACEMENT ALGORITHM
LEAST RECENTLY USED (LRU) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
SIMULATING LRU IN SOFTWARE (1) ,[object Object]
SIMULATING LRU IN SOFTWARE (2) ,[object Object],[object Object]
THE WORKING SET PAGE REPLACEMENT ALGORITHM (1) ,[object Object],[object Object]
THE WORKING SET PAGE REPLACEMENT ALGORITHM (2) ,[object Object]
THE WSCLOCK PAGE REPLACEMENT ALGORITHM ,[object Object]
REVIEW OF PAGE REPLACEMENT ALGORITHMS
MODELING PAGE REPLACEMENT ALGORITHMS BELADY'S ANOMALY ,[object Object],[object Object],[object Object]
STACK ALGORITHMS ,[object Object],7 4 6 5
THE DISTANCE STRING ,[object Object]
THE DISTANCE STRING ,[object Object],[object Object],[object Object]
DESIGN ISSUES FOR PAGING SYSTEMS LOCAL VERSUS GLOBAL ALLOCATION POLICIES (1) ,[object Object],[object Object],[object Object]
LOCAL VERSUS GLOBAL ALLOCATION POLICIES (2) ,[object Object]
LOAD CONTROL ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
PAGE SIZE (1) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
PAGE SIZE (2) ,[object Object],[object Object],[object Object],[object Object],[object Object],page table space internal fragmentation Optimized when
SEPARATE INSTRUCTION AND DATA SPACES ,[object Object],[object Object]
SHARED PAGES ,[object Object]
CLEANING POLICY ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
IMPLEMENTATION ISSUES OPERATING SYSTEM INVOLVEMENT WITH PAGING ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
PAGE FAULT HANDLING (1) ,[object Object],[object Object],[object Object],[object Object],[object Object]
PAGE FAULT HANDLING (2) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
INSTRUCTION BACKUP ,[object Object]
LOCKING PAGES IN MEMORY ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
BACKING STORE ,[object Object],[object Object]
SEPARATION OF POLICY AND MECHANISM ,[object Object]
SEGMENTATION (1) ,[object Object],[object Object]
SEGMENTATION (2) ,[object Object]
SEGMENTATION (3) ,[object Object]
IMPLEMENTATION OF PURE SEGMENTATION ,[object Object],[object Object]
SEGMENTATION WITH PAGING: MULTICS (1) ,[object Object],[object Object]
SEGMENTATION WITH PAGING: MULTICS (2) ,[object Object]
SEGMENTATION WITH PAGING: MULTICS (3) ,[object Object]
SEGMENTATION WITH PAGING: MULTICS (4) ,[object Object],[object Object]
SEGMENTATION WITH PAGING: PENTIUM (1) ,[object Object]
SEGMENTATION WITH PAGING: PENTIUM (2) ,[object Object],[object Object]
SEGMENTATION WITH PAGING: PENTIUM (3) ,[object Object]
SEGMENTATION WITH PAGING: PENTIUM (4) ,[object Object]
SEGMENTATION WITH PAGING: PENTIUM (5) ,[object Object],Level

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Memory Management

  • 1. MEMORY MANAGEMENT 4.1 Basic memory management 4.2 Swapping 4.3 Virtual memory 4.4 Page replacement algorithms 4.5 Modeling page replacement algorithms 4.6 Design issues for paging systems 4.7 Implementation issues 4.8 Segmentation
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  • 24. THE CLOCK PAGE REPLACEMENT ALGORITHM
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