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Problems 3. A segmented memory has paged segments. Each virtual address has a 2- bit segment number, a 2-bit page number, and an 11-bit offset within the page. The main memory contains 32 KB, divided into 2-KB pages. Each segment is either read- only, read/execute,read/write, or read/write/execute. The page tables and protection are as follows: Segment 0 Segment 1 Read only Read/execute Virtual Page Virtual Page page frame page frame 0 0 1 2 3 23 9 3 On disk 12 On disk 0 15 8 Segment 2 Read/write/execute Page table not in main memory Segment 3 Read/write Virtual page 0 1 2 3 Page frame 14 1 6 On disk For each of the following accesses to virtual memory, tell what physical address is computed. If a fault occurs, tell which kind.

Problems 3. A segmented memory has paged segments. Each virtual address has a 2- bit segment number, a 2-bit page number, and an 11-bit offset within the page. The main memory contains 32 KB, divided into 2-KB pages. Each segment is either read- only, read/execute,read/write, or read/write/execute. The page tables and protection are as follows: Segment 0 Segment 1 Read only Read/execute Virtual Page Virtual Page page frame page frame 0 0 1 2 3 23 9 3 On disk 12 On disk 0 15 8 Segment 2 Read/write/execute Page table not in main memory Segment 3 Read/write Virtual page 0 1 2 3 Page frame 14 1 6 On disk For each of the following accesses to virtual memory, tell what physical address is computed. If a fault occurs, tell which kind.

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Problems 3. A segmented memory has paged segments. Each virtual address has a 2- bit segment number, a 2-bit page number, and an 11-bit offset within the page. The main memory contains 32 KB, divided into 2-KB pages. Each segment is either read- only, read/execute,read/write, or read/write/execute. The page tables and protection are as follows: Segment 0 Read only Virtual Page page frame 9 0 1 3 2 On disk 3 12 Segment 1 Read/execute Virtual Page frame On disk 0 15 8 page 0 1 2 3 Segment 2 Read/write/execute Access 1. fetch data 2. fetch data 3. fetch data 4. store data Page table not in main memory 5. store data 6. store data 7. branch to it 8. fetch data 9. fetch data 10. branch to it 0 1 3 0 For each of the following accesses to virtual memory, tell what physical address is computed. If a fault occurs, tell which kind. 3 3 1 Virtual Page frame Segment Page 1 1 0 2 3 page 0 1 Segment 3 Read/write 3 3 1 1 0 3 2 0 14 1 6 On Offset within page 1 10 2047 4 2 14 100 50 5 60
Transcribed Image Text:Problems 3. A segmented memory has paged segments. Each virtual address has a 2- bit segment number, a 2-bit page number, and an 11-bit offset within the page. The main memory contains 32 KB, divided into 2-KB pages. Each segment is either read- only, read/execute,read/write, or read/write/execute. The page tables and protection are as follows: Segment 0 Read only Virtual Page page frame 9 0 1 3 2 On disk 3 12 Segment 1 Read/execute Virtual Page frame On disk 0 15 8 page 0 1 2 3 Segment 2 Read/write/execute Access 1. fetch data 2. fetch data 3. fetch data 4. store data Page table not in main memory 5. store data 6. store data 7. branch to it 8. fetch data 9. fetch data 10. branch to it 0 1 3 0 For each of the following accesses to virtual memory, tell what physical address is computed. If a fault occurs, tell which kind. 3 3 1 Virtual Page frame Segment Page 1 1 0 2 3 page 0 1 Segment 3 Read/write 3 3 1 1 0 3 2 0 14 1 6 On Offset within page 1 10 2047 4 2 14 100 50 5 60
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