--%>
Assignment Help - homework help

Networking, Distributed and Concurrent Programming

Homework Assignment : A Barbershop Problem Due: November 20, 2012 In this assignment, you are asked to write a multithreading problem to simulate the barbershop problem, which is a classical synchronization problem. The problem is taken from William Stallings's Operating Systems: Internals and Design Principles, 3rd Edition, 1998. Barber problem: Orchestrating activities in a barbershop 1. 3 chairs, 3 barbers, 1 cash register, waiting area includes 4 customers on a sofa, plus additional standing room for 7 customers. 2. A customer : • Will not enter the shop if it is filled to capacity • Takes a seat on the sofa, or stands if sofa is filled • When a barber is free, the customer waiting longest on sofa is served, the customer standing longest takes up seat on the sofa • When a customer's haircut is finished, any barber can accepted payment but because of the single cash register, only one payment is accepted at a time • Barbers divide their time between cutting hair, accepting payment and sleeping Assume the arrival rate of customers is 1 customer/3 minutes, the haircut speed of three barbers are the same 5 minutes. Initially, all three barbers are sleeping, and there is no guest in the barbershop. The output of your program is the snapshot of the barbershop at a given time (an input parameter of the program), including how many customers in the barbershop, how many are seated, how many are on the barber chairs, current status of three barbers, current status of cashier, and how many customers are dropped. Hints: • You can start from the code included in the slides, and try to solve the remaining problems (slides) step by step. • The interval of your simulation step should not larger than 1 minute. Extra credits: You can get 0.5 extra credit if you can handle the poisson arrival of customers. You can get 0.5 extra if you can handle varied hair cutting speed.

   Related Questions in Programming Languages

  • Q : What is Big-endian Big-endian : This is

    Big-endian: This is a common difference among machines, the order in which they store individual bytes of multi-byte numerical data. Big-endian machine stores the higher-order bytes previous to the lower-order bytes.

    		•
  • Q : What is BLAST in program model checking

    What is BLAST in program model checking: The abbreviation is Berkeley Lazy Abstraction Software Verification Tool (BLAST) is a software model checker for C programs. The main goal of BLAST (BLAST website) is to be able to check that software satisfies

    		•
  • Q : Why do I require TC Trustcenter

    Why do I require TC Trustcenter Publisher ID?

    		•
  • Q : Explain Assignment operator Assignment

    Assignment operator: The operator (=) employed to store the value of an expression into the variable, for example: Variable = expression; The right-hand

    		•
  • Q : What is an Exception Exception : An

    Exception: An object symbolizing the occurrence of an exceptional circumstance - usually, something which has gone wrong in the smooth running of a program. Exception objects are made from classes which expand the Throwable class.

    		•
  • Q : Write a program that enters some text

    Write a program that enters some text into a char string called char text[100] and does the following: a) Calls a function called void vowels(char text[]) that prints out how many times each vowel (a/A, e/E, I/i, O/o, U/u) was foun

    		•
  • Q : What is an Instantiation What is an

    What is an Instantiation: It is a creation of an instance of a class, i.e., an object.

    		•
  • Q : Main purpose of Child Header files

    Illustrate what is the main purpose of Child Header files?

    		•
  • Q : Recursive Matlab function Write a

    Write a recursive Matlab function TriUVRCol that solves a virtually upper triangular system of equations accessing the matrix by column. Write another recursive Matlab function LUPivRec that recursively computes the LU decomposition of a matrix using partial pivoting.

    		•
  • Q : Define the term Host system Define the

    Define the term Host system: It is a computer system on which a process is executed or run.

    		•