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Suppose the page table for process B that is currently executed on the processor is as in Table 1. The memory has four (4) frames with a page size of 1 Kbytes in memory.                              Table 1: Process B page table Page Number Present Bit Frame Number 0 1 2 1 0   2 1 0 3 1 1 4 0   5 0   6 1 3 7 0       Calculate the length (bit) of the logical and physical addresses.       List the logical address ranges for each page.       Given the following new ordered page references to the logical addresses: 1100 and 2100 Demonstrate how Least Recently Used (LRU) page replacement policy can be used to replace page fault for the above page references considering the previous occurrences of pages: 3, 2, 2, 0, 3, 6, 3.

Suppose the page table for process B that is currently executed on the processor is as in Table 1. The memory has four (4) frames with a page size of 1 Kbytes in memory.                              Table 1: Process B page table Page Number Present Bit Frame Number 0 1 2 1 0   2 1 0 3 1 1 4 0   5 0   6 1 3 7 0       Calculate the length (bit) of the logical and physical addresses.       List the logical address ranges for each page.       Given the following new ordered page references to the logical addresses: 1100 and 2100 Demonstrate how Least Recently Used (LRU) page replacement policy can be used to replace page fault for the above page references considering the previous occurrences of pages: 3, 2, 2, 0, 3, 6, 3.

Database System Concepts
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
Section: Chapter Questions
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Suppose the page table for process B that is currently executed on the processor is as in Table

  1. 1. The memory has four (4) frames with a page size of 1 Kbytes in memory.

 

                           Table 1: Process B page table

Page Number

Present Bit

Frame Number

0

1

2

1

0

 

2

1

0

3

1

1

4

0

 

5

0

 

6

1

3

7

0

 

 

 

  1. Calculate the length (bit) of the logical and physical addresses.

 

 

 

  1. List the logical address ranges for each page.

 

 

 

  1. Given the following new ordered page references to the logical addresses:

1100 and 2100

Demonstrate how Least Recently Used (LRU) page replacement policy can be used to replace page fault for the above page references considering the previous occurrences of pages: 3, 2, 2, 0, 3, 6, 3.

 

 

                                 

 

 

  1. Demonstrate the steps of the main memory address translation (logical addresses to physical addresses). If there is a page fault, compute the physical addresses (in decimal unit) after the page replacement.

 

 

  1. From your understanding, why LRU is better compare to the first-in-first-out (FIFO) policy.

 

 

             

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