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Name: 1. How does the memory allocated and released in a buddy system? Imple
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Description: 1. How does the memory allocated and released in a buddy system? Implement the following statements as an example, if there is a 1 Mbyte block of memory vacant to occupy. a) a request came to reserve 100K in the memory, b) then another request came t

Engineering

Computer Science

the memory allocated and released in a buddy system

C++ for Engineers and Scientists

4th Edition

ISBN:9781133187844

Author:Bronson, Gary J.

Publisher:Bronson, Gary J.

Chapter2: Problem Solving Using C++using

Section2.3: Data Types

Problem 9E: (Practice) Although the total number of bytes varies from computer to computer, memory sizes of...

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Exercise 2: A byte addressable memory has a size of 1024 MBytes. This memory is attached to a direct mapping cache of 32KBytes that contains 1024 lines. a. What is the memory address length? b. What is the block size? c. What is the number of blocks in main memory? d. What is the length in bit of: tag (T), line number (L) and byte number (W)? e. Determine in Hexadecimal the tag (T), line number (L) and byte number (W) of the following Hexadecimal memory address: 000008AE f. What is the block that contains the address 000000DE? g. Which line of the cache can hold the block containing 000000DE?
Assume that a memory module contains three holes of 10MB each. A sequence of 14 requests for 1MB each will be processed (See the diagram below). For each of the memory allocation methods listed below, draw a diagram representing how memory is allocated and determine the sizes of the remaining holes after all 14 requests have been satisfied. First fit Next fit C. Best fit d. a. b. Worst fit Hint - For the Next fit, the following allocation starts with the hole following the previous allocation 10 Mb 10 Mb 10 Mb
There are many parameters that could be used to describe disk performance; among them are: number of bits per track disk capacity (in bits) number of disk surfaces rotational speed rotational latency transfer rate tracks per surface sectors per track blocks per track sectors per block seek time speed of disk arm block-read time number of blocks Some of these parameters are independent, and others are (approximately) linearly related. That is, doubling one doubles the other. Decide which of these parameters are linearly related. Then, select from the list below, the relationship that is true, to within a close approximation. Note: none of the statements may be true exactly, but one will always be much closer to the truth than the other three. Also note: you should assume all dimensions and parameters of the disk are unchanged except for the ones mentioned. a) If you divide tracks into half as many blocks, then you double the read time for a block.…
Q4: Disk controllers map logical blocks to physical locations on the disk. Suppose that a 10MB file consisting of 1024-byte logical blocks is stored on a disk drive with the following characteristics: Rotational rate: Average seek time: Average sectors/track: Surfaces: Sector size: 12,000 RPM 8ms 1024 8 1024 bytes Suppose that a program reads all the blocks of this file sequentially, and that the time to position the head over the first block is the average seek time plus the average rotational latency. 4a) What is the best case for mapping logical blocks to disk sectors? Estimate the time required to read the file in this best-case scenario. 4b) Suppose that the logical blocks are mapped randomly to disk sectors. Estimate the time required to read the file in this scenario
There are many parameters that could be used to describe disk performance; among them are: number of bits per track disk capacity (in bits) number of disk surfaces rotational speed rotational latency transfer rate tracks per surface sectors per track blocks per track sectors per block seek time speed of disk arm block-read time number of blocks Some of these parameters are independent, and others are (approximately) linearly related. That is, doubling one doubles the other. Decide which of these parameters are linearly related. Then, select from the list below, the relationship that is true, to within a close approximation. Note: none of the statements may be true exactly, but one will always be much closer to the truth than the other three. Also note: you should assume all dimensions and parameters of the disk are unchanged except for the ones mentioned. a) If you double the number of sectors per block, then you double the number of blocks on the disk. b)…
(Practice) Although the total number of bytes varies from computer to computer, memory sizes of millions and billions of bytes are common. In computer language, the letter M representsthe number 1,048,576, which is 2 raised to the 20th power, and G represents 1,073,741,824, which is 2 raised to the 30th power. Therefore, a memory size of 4 MB is really 4 times 1,048,576 (4,194,304 bytes), and a memory size of 2 GB is really 2 times 1,073,741,824 (2,147,483,648 bytes). Using this information, calculate the actual number of bytes in the following: a. A memory containing 512 MB b. A memory consisting of 512 MB words, where each word consists of 2 bytes c. A memory consisting of 512 MB words, where each word consists of 4 bytes d. A thumb drive that specifies 2 GB e. A disk that specifies 4 GB f. A disk that specifies 8 GB
The Tower of Hanoi Problem Tower of Hanoi is a mathematical game consisting of three pegs (P1, P2 and P3) and a stack of disks of different diameters. Disks can slide onto any peg. The game starts with all disks stacked on P1 and ends at the point where all disks stacked on P3. The game player is required to move all disks from P1 to P3 using P2 as a buffer. Three rules must be followed when playing the game (1) Only one disk may be moved at a time. (2) Each move involves taking a disk on the top of a peg and place it on the top of another peg. (3) A disk of a larger diameter should never be placed on top of a disk of a smaller diameter. The diagrams below demonstrate the starting state and goal state of the game with 5 disks. starting sate p1 to goal state p3 Requirements In this assignment, students are required to solve the Tower of Hanoi (with five disks) using state space search algorithms implemented in Python. Two state space search algorithms: (1) a blind search (depth-first…
Please refer to this textbook: “A. Silberschatz, P. B. Galvin and G. Gagne, “Operating System Principles,”7th Edition, John Wiley & Sons Inc., 2006.” And answer the following questions: Question:15 A system has the following blocks queued for writing: 8000, 3000, 5000, 2000. The most recently written block was 4500. The block read before that was 2500. (a) What sequence of writes will a C-SCAN algorithm generate? (b) What sequence of writes will a SCAN algorithm generate? (c) What sequence of writes will a FCFS algorithm generate? (d) What sequence of writes will a SSTF algorithm generate? (e) What sequence of writes will a LOOK algorithm generate?
Given the following: Logical Memory size of 1000 Physical Memory size of 2000 Page (and frame) size of 100 Block A contains data for a program Select Block A’s size and its starting point in both memories. Then write the page table for Block A based on your selections. See below for the layout of both memories and an example of Block A of size 200. Logical Memory Physical Memory location/ page location/frame 0 to 99/ 0 0 to 99/ 0 100 to 199 /1 Block A 100 to 199/ 1 200 to 299/ 2 Block A 200 to 299/ 2 300 to 399/ 3 300 to 399/ 3 400 to 499/ 4 400 to 499/ 4 500 to 599/ 5 500 to 599/ 5 600 to 699/ 6 600 to 699/ 6 700 to 799/ 7 700 to 799/ 7 800 to 899/ 8 800 to 899/ 8 900 to 999/ 9 900 to 999/ 9 1000 to 1099/ 10 1100 to 1199/ 11 1200 to 1299/ 12 1300 to 1399/ 13 Block A 1400 to 1499/ 14 Block…
Problem DescriptionThe Tower of Hanoi ProblemTower of Hanoi is a mathematical game consisting of three pegs (P1, P2 and P3) and a stack of disks of different diameters. Disks can slide onto any peg. The game starts with all disks stacked on P1 and ends at the point where all disks stacked on P3. The game player is required to move all disks from P1 to P3 using P2 as a buffer. Three rules must be followed when playing the game(1) Only one disk may be moved at a time.(2) Each move involves taking a disk on the top of a peg and place it on the top of another peg. (3) A disk of a larger diameter should never be placed on top of a disk of a smaller diameter. The diagrams below demonstrate the starting state and goal state of the game with 5 disks.Starting state Goal stateP1 P2 P3 P1 P2 P32RequirementsIn this assignment, students are required to solve the Tower of Hanoi (with five disks) using state space search algorithms implemented in Python.Two state space search algorithms: (1) a blind…
Oeew s Sat DO D 4 Hene et e H P E Dei vi At D Metig eta O t TE Fie • REC In Net ASSIGNMENT 1. The table below presents a list of devices that are to be addressed in a certain memory space. They have been ordered in the manner in which S S they are to be addressed with the first component being placed on the upper end of memory, starting at address $000000. By considering the size each component, provide the start and end address using the appropriate hexadecimal value. l Device Description Device Name Amount of memory to address ROM Chip ROM 1 RAM 1 4KB RAM Chip 8KB ROM Chip ROM 2 4KB Peripheral PER 1 4 bytes Peripheral PER 2 2 bytes 2. Assume a very simple microprocessor with 12 address lines Let's assume we wish to implement all its memory space and we use 517x8 memory chigs. a. What is the size of the largest addressable memory? 1aa H Q O B CEOE
The control signal Ep or iEnableoutput allows the program counter to decrement its value. True False The control signal Ep or iEnableoutput sends the content of the program counter to the W bus. True False A tri-state buffer is needed for all data going to the W bus. True False In using 'assign' statement in Verilog, the left hand side must always be a register. True False In declaring a register in Verilog, the following format must be followed: reg [LSB:MSB] identifier; True False