A paged memory is shared by two processes, p1 and p2. 16 24 15 1 3 -2 9 -3 17 -12 25 -3 18 -16 19 10 8 26 27 2 3 11 12 4 -45 12 20 21 22 23 28 Page table 13-12 Page table 29 1 8 6 28 of p1 7 14 24 of p2 15 30 31 -2 • The size of each page and page table is 4. • The page table of p1 begins at address 4. The page table of p2 begins at address 12. • A dash denotes a nonexistent page. • The sign bit serves as the present bit. Thus a positive number in a page table is the address of a resident page and a negative number denotes a non-resident page. Both processes reference the virtual addresses: 0, 1, 4, 5, 8, 10, 12, 15. Fill in the missing entries in the following table. In the "Access by p1" and "Access by p2" columns, enter one of the following: • If the address being referenced is in memory, enter the value found in the associated memory location. • If the memory reference will cause a page fault, enter "Page fault" • If the memory reference is illegal, enter "Error"

A paged memory is shared by two processes, p1 and p2. 16 24 15 1 3 -2 9 -3 17 -12 25 -3 18 -16 19 10 8 26 27 2 3 11 12 4 -45 12 20 21 22 23 28 Page table 13-12 Page table 29 1 8 6 28 of p1 7 14 24 of p2 15 30 31 -2 • The size of each page and page table is 4. • The page table of p1 begins at address 4. The page table of p2 begins at address 12. • A dash denotes a nonexistent page. • The sign bit serves as the present bit. Thus a positive number in a page table is the address of a resident page and a negative number denotes a non-resident page. Both processes reference the virtual addresses: 0, 1, 4, 5, 8, 10, 12, 15. Fill in the missing entries in the following table. In the "Access by p1" and "Access by p2" columns, enter one of the following: • If the address being referenced is in memory, enter the value found in the associated memory location. • If the memory reference will cause a page fault, enter "Page fault" • If the memory reference is illegal, enter "Error"

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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Question

A paged memory is shared by two processes, p1 and p2.
8
24
25
-3
16
17-12
18-16
19
15
9
-3
1
3
10
8
26
-3
27
2
-2
11 12
4-45
8 Page table
6 28 of p1
12
20
28
29
30
13 -12 |Page table
21
22
1
24 of p2
2
14
7
-2
15
23
31
3
• The size of each page and page table is 4.
The page table of p1 begins at address 4. The page table of p2 begins at address 12.
· A dash denotes a nonexistent page.
The sign bit serves as the present bit. Thus a positive number in a page table is the address of a resident page and a
negative number denotes a non-resident page.
Both processes reference the virtual addresses: 0, 1,4, 5, 8, 10, 12, 15.
Fill in the missing entries in the following table. In the "Access by p1" and "Access by p2" columns, enter one of the following:
• If the address being referenced is in memory, enter the value found in the associated memory location.
• If the memory reference will cause a page fault, enter "Page fault"
• If the memory reference is illegal, enter "Error"
Virtual Address
Page Number (p)
Offset (w)
Access by p1
Access by p2
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1
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Blank 15
Blank 16
8
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10
Blank 21
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Blank 23
Blank 24
12
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15
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