Suppose the page table for the process currently executing on the processor looks like the following. All numbers are decimal, everything is numbered starting from zero and all addresses are memory byte addresses. The page size is 1024 bytes. Virtual page number 0 1 2 3 4 5 Valid bit 1 1 0 1 0 1 Reference bit 1 1 0 0 0 0 Modify bit 0 1 0 0 0 1 Page frame number 4 7 2 0 a. Describe exactly how, in general, a virtual address generated by the CPU is trans lated into a physical main memory address. b. What physical address, if any, would each of the following virtual addresses corre spond to? (Do not try to handle any page faults, if any.) (i) 1052 (ii) 2221 5499

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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Suppose the page table for the process currently executing on the processor looks like
the following. All numbers are decimal, everything is numbered starting from zero,
and all addresses are memory byte addresses. The page size is 1024 bytes.
Virtual page
number
0
1
2
3
4
5
Valid bit
1
1
0
1
0
1
(ii) 2221
(iii) 5499
Reference bit
1
1
0
0
0
0
Modify bit
0
1
0
0
0
1
Page frame
number
4
7
-
2
0
a. Describe exactly how, in general, a virtual address generated by the CPU is trans-
lated into a physical main memory address.
b. What physical address, if any, would each of the following virtual addresses corre-
spond to? (Do not try to handle any page faults, if any.)
(i) 1052
Transcribed Image Text:Suppose the page table for the process currently executing on the processor looks like the following. All numbers are decimal, everything is numbered starting from zero, and all addresses are memory byte addresses. The page size is 1024 bytes. Virtual page number 0 1 2 3 4 5 Valid bit 1 1 0 1 0 1 (ii) 2221 (iii) 5499 Reference bit 1 1 0 0 0 0 Modify bit 0 1 0 0 0 1 Page frame number 4 7 - 2 0 a. Describe exactly how, in general, a virtual address generated by the CPU is trans- lated into a physical main memory address. b. What physical address, if any, would each of the following virtual addresses corre- spond to? (Do not try to handle any page faults, if any.) (i) 1052
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