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A buddy system allocates memory from a fixed-size segment consisting of physically contiguous pages using a power-of-2 allocator. Consider a computer system that has 256M memory available. By using diagram, show the results of each memory request/release via memory layout at each stage according to the followings orders: requests 25M requests 110M requests 52M Release A Release C requests 75M Page Time Loaded Last Reference R bit M bit 2 117 212 1 1 0 130 264 0 0 3 58 240 1 0 1 86 203 1 1 In your own words, explain what happened to the memory block prior to the last request allocation.   Calculate the total of internal fragmentation (in M unit) after memory allocation to request C is fulfilled

A buddy system allocates memory from a fixed-size segment consisting of physically contiguous pages using a power-of-2 allocator. Consider a computer system that has 256M memory available. By using diagram, show the results of each memory request/release via memory layout at each stage according to the followings orders: requests 25M requests 110M requests 52M Release A Release C requests 75M Page Time Loaded Last Reference R bit M bit 2 117 212 1 1 0 130 264 0 0 3 58 240 1 0 1 86 203 1 1 In your own words, explain what happened to the memory block prior to the last request allocation.   Calculate the total of internal fragmentation (in M unit) after memory allocation to request C is fulfilled

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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  1. A buddy system allocates memory from a fixed-size segment consisting of physically contiguous pages using a power-of-2 allocator. Consider a computer system that has 256M memory available.
  2. By using diagram, show the results of each memory request/release via memory layout at each stage according to the followings orders:
    • requests 25M
    • requests 110M
    • requests 52M

Release A

Release C

  • requests 75M

Page

Time Loaded

Last Reference

R bit

M bit

2

117

212

1

1

0

130

264

0

0

3

58

240

1

0

1

86

203

1

1
  1. In your own words, explain what happened to the memory block prior to the last request allocation.

 

  1. Calculate the total of internal fragmentation (in M unit) after memory allocation to request C is fulfilled.
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