In this project, we are to design and implement a multithreaded or multiprocessed program to determine if a given number is a perfect number. The objectives of this project are,
computer science
Description
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Project : Perfect Number on Multicore Systems |
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In this project, we are to design and implement a multithreaded or multiprocessed program to determine if a given number is a perfect number. The objectives of this project are, |
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• to design and implement multithreaded or multiprocessed programs; • to gain hands-on experience to speed up computation on multicore systems; • to identify critical sections in multithreaded or multiprocessed programs; |
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• and use appropriate synchronization primitives (e.g., mutex locks, semaphores) to coordinate multiple threads or processes. |
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1 Project Description |
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An positive integer N is a perfect number if the sum of all its factors excluding itself is N, where a factor is a perfect divisor of N. Let’s examine the following examples. |
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• Given number 6, we know its factors are 1, 2, and 3 excluding itself. Since 1 + 2 + 3 = 6, 6 is a perfect number. |
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• Given number 28, its factors are 1, 2, 4, 7, and 14 excluding itself, and since 1+2+4+7+14 = 28, 28 is also a perfect number. |
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• Given number 496, its factors are 1, 2, 4, 8, 16, 31, 62, 124, and 248 excluding itself, and since 496 = 1 + 2 + 4 + 8 + 16 + 31 + 62 + 124 + 248, 496 is too a perfect number. |
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• Given number 30, its factors are 1, 2, 3, 5, 6, 10, and 15 excluding itself, since 1 + 2 + 3 + 5 + 6 + 10 + 15 = 426= 30, 30 isn’t a perfect number. |
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You are to design and implement either a multithreaded or a multiprocessed program to deter- mine whether a number is a perfect number. Your program must meet the following requirements, |
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1. The input to the program is an integer, denoted as N. The output of the program is 0 if N is a perfect number and 1 otherwise. The program will read the number N from the command line, and the program does not print out the output, instead, it returns to the calling process with exit code 0, 1, and -1. As indicated, 0 means that the number is a perfect number, 1 otherwise, and -1 if error occurs. |
