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Virtual Memory: Beyond the Physical Memory
CSCE 410/611 Virtual Memory: Beyond the Physical Memory Swapping of Processes to Secondary Storage “Partial Swapping” of Process Memory? Memory Access Patterns Swapping at Page Level? Virtual Memory: Beyond Physical Memory
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libraries & dev.drivers
CSCE 410/611 Swapping of Processes Process 4 physical memory space libraries & dev.drivers OS Process 1 Process 2 Process 3 swapped processes Virtual Memory: Beyond Physical Memory
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libraries & dev.drivers
CSCE 410/611 Swapping of Processes physical memory space libraries & dev.drivers OS Process 1 Process 4 swapped processes Process 2 Process 3 Virtual Memory: Beyond Physical Memory
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“Partial Swapping” of Process Memory
CSCE 410/611 “Partial Swapping” of Process Memory Process 4 physical memory space libraries & dev.drivers OS Process 1 Process 3 Process 2 swapped memory Observation: Processes never use all their memory at once! Virtual Memory: Beyond Physical Memory
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“Partial Swapping” of Process Memory
CSCE 410/611 “Partial Swapping” of Process Memory Process 4 physical memory space libraries & dev.drivers OS Process 1 Process 3 Process 2 swapped memory Virtual Memory: Beyond Physical Memory
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“Partial Swapping” of Process Memory
CSCE 410/611 “Partial Swapping” of Process Memory Process 4 physical memory space libraries & dev.drivers OS Process 1 Process 3 Process 2 swapped memory Virtual Memory: Beyond Physical Memory
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“Partial Swapping” of Process Memory
CSCE 410/611 “Partial Swapping” of Process Memory Process 4 physical memory space libraries & dev.drivers OS swapped memory Virtual Memory: Beyond Physical Memory
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“Partial Swapping” of Process Memory
CSCE 410/611 “Partial Swapping” of Process Memory physical memory space libraries & dev.drivers OS swapped memory Virtual Memory: Beyond Physical Memory
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“Partial Swapping” of Process Memory
CSCE 410/611 “Partial Swapping” of Process Memory Process 5 physical memory space libraries & dev.drivers OS swapped memory Virtual Memory: Beyond Physical Memory
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“Partial Swapping” of Process Memory
CSCE 410/611 “Partial Swapping” of Process Memory physical memory space libraries & dev.drivers OS swapped memory Virtual Memory: Beyond Physical Memory
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“Partial Swapping” of Process Memory
CSCE 410/611 “Partial Swapping” of Process Memory Process 5 physical memory space libraries & dev.drivers OS swapped memory Virtual Memory: Beyond Physical Memory
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Memory Access Patterns
CSCE 410/611 Memory Access Patterns referenced pages execution time Virtual Memory: Beyond Physical Memory
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Memory Access Patterns
CSCE 410/611 Memory Access Patterns referenced pages execution time Virtual Memory: Beyond Physical Memory
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Memory Access Patterns
CSCE 410/611 Memory Access Patterns referenced pages execution time Virtual Memory: Beyond Physical Memory
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Memory Access Patterns
CSCE 410/611 Memory Access Patterns referenced pages execution time Virtual Memory: Beyond Physical Memory
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Memory Access Patterns
CSCE 410/611 Memory Access Patterns referenced pages execution time Virtual Memory: Beyond Physical Memory
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Page-Level on-Demand Swapping
CSCE 410/611 Page-Level on-Demand Swapping swapping device pages of process swapped pages These pages are stored in memory Virtual Memory: Beyond Physical Memory
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Page-Level on-Demand Swapping
CSCE 410/611 Page-Level on-Demand Swapping swapping device pages of process swapped pages These are stored on swapping device Virtual Memory: Beyond Physical Memory
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Page-Level on-Demand Swapping
CSCE 410/611 Page-Level on-Demand Swapping swapping device pages of process swapped pages CPU Virtual Memory: Beyond Physical Memory
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Page-Level on-Demand Swapping
CSCE 410/611 Page-Level on-Demand Swapping swapping device pages of process swapped pages CPU Virtual Memory: Beyond Physical Memory
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Page-Level on-Demand Swapping
CSCE 410/611 Page-Level on-Demand Swapping swapping device pages of process swapped pages CPU Virtual Memory: Beyond Physical Memory
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Page-Level on-Demand Swapping
CSCE 410/611 Page-Level on-Demand Swapping swapping device pages of process swapped pages CPU zzz... Virtual Memory: Beyond Physical Memory
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Page-Level on-Demand Swapping
CSCE 410/611 Page-Level on-Demand Swapping swapping device pages of process swapped pages CPU Virtual Memory: Beyond Physical Memory
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Virtual Memory: Beyond the Physical Memory
CSCE 410/611 Virtual Memory: Beyond the Physical Memory Swapping of Processes to Secondary Storage “Partial Swapping” of Process Memory? Memory Access Patterns Swapping at Page Level? On-demand Paging Virtual Memory Virtual Memory: Beyond Physical Memory
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