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As described in Section 5.7, virtual memory uses a page table to track the mapping of virtual addresses to physical addresses. This exercise shows how this table must be updated as addresses are accessed. The following data constitute a stream of virtual byte addresses as seen on a system. Assume 4 KiB pages, a fourentry fully associative TLB, and true LRU replacement. If pages must be brought in from disk, increment the next largest page number. Decimal 4669 hex |2227 |13916 |34587 |48870 |12608 |49225 0x123d 0x08b3| Ox365c |0x871b|0xbee6 | 0x3140 |0xc049 TLB Physical Page Time Since Last Valid Tag Number Access Osb 12 Ox7 1. Ox3 3. Ox4 Page table Index Valid Physical Page or In Disk Disk Disk 11 Disk 4 Disk Disk b 12 [10] <§5.7> For each access shown above, list • whether the access is a hit or miss in the TLB, • whether the access is a hit or miss in the page table, • whether the access is a page fault, • the updated state of the TLB.

As described in Section 5.7, virtual memory uses a page table to track the mapping of virtual addresses to physical addresses. This exercise shows how this table must be updated as addresses are accessed. The following data constitute a stream of virtual byte addresses as seen on a system. Assume 4 KiB pages, a fourentry fully associative TLB, and true LRU replacement. If pages must be brought in from disk, increment the next largest page number. Decimal 4669 hex |2227 |13916 |34587 |48870 |12608 |49225 0x123d 0x08b3| Ox365c |0x871b|0xbee6 | 0x3140 |0xc049 TLB Physical Page Time Since Last Valid Tag Number Access Osb 12 Ox7 1. Ox3 3. Ox4 Page table Index Valid Physical Page or In Disk Disk Disk 11 Disk 4 Disk Disk b 12 [10] <§5.7> For each access shown above, list • whether the access is a hit or miss in the TLB, • whether the access is a hit or miss in the page table, • whether the access is a page fault, • the updated state of the TLB.

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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What would be some advantages of having a larger page size of 16 KiB? What are some disadvantages?

 

 

Chapter 5.16, Problem 1E Bookmarked Show all steps: ON As described in Section 5.7, virtual memory uses a page table to track the mapping of virtual addresses to physical addresses. This exercise shows how this table must be updated as addresses are accessed. The following data constitute a stream of virtual byte addresses as seen on a system. Assume 4 KiB pages, a fourentry fully associative TLB, and true LRU replacement. If pages must be brought in from disk, increment the next largest page number. Decimal 4669 49225 0x123d 0x08b3 0x365c |0x871b | 0xbee6 |0x3140 |0xc049 2227 13916 34587 48870 12608 hex TLB Physical Page Time Since Last Valid Tag Number Access 1. Oxb 12 1. Ox7 Ox3 6 3 Ox4 Page table Index Valid Physical Page or in Disk 1 Disk Disk 1. 4 1. 9 11 Disk 7 1. 4 Disk Disk 1. by 1 12 [10] <§5.7> For each access shown above, list • whether the access is a hit or miss in the TLB, • whether the access is a hit or miss in the page table, • whether the access is a page fault, • the updated state of the TLB. !!!
Transcribed Image Text:Chapter 5.16, Problem 1E Bookmarked Show all steps: ON As described in Section 5.7, virtual memory uses a page table to track the mapping of virtual addresses to physical addresses. This exercise shows how this table must be updated as addresses are accessed. The following data constitute a stream of virtual byte addresses as seen on a system. Assume 4 KiB pages, a fourentry fully associative TLB, and true LRU replacement. If pages must be brought in from disk, increment the next largest page number. Decimal 4669 49225 0x123d 0x08b3 0x365c |0x871b | 0xbee6 |0x3140 |0xc049 2227 13916 34587 48870 12608 hex TLB Physical Page Time Since Last Valid Tag Number Access 1. Oxb 12 1. Ox7 Ox3 6 3 Ox4 Page table Index Valid Physical Page or in Disk 1 Disk Disk 1. 4 1. 9 11 Disk 7 1. 4 Disk Disk 1. by 1 12 [10] <§5.7> For each access shown above, list • whether the access is a hit or miss in the TLB, • whether the access is a hit or miss in the page table, • whether the access is a page fault, • the updated state of the TLB. !!!
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