--%>
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 : How much does Symbian Signed

    How much does Symbian Signed certification and testing cost? Answer: Test houses contain their own prices for Symbian Signed testing. So you can check that prices through searching over the internet.

    		•
  • Q : What is Class header Class header : It

    Class header: It is a header of class definition. The header provides a name to the class and states its access. It too explains whether the class expands a super class or implements any interfaces.

    		•
  • Q : What is Reflection Reflection : It is

    Reflection: It is the ability to find out what fields, methods, constructors, and so forth, are stated for an object or class. Reflection is supported by the Class ‘class’, and other classes in the java.lang.reflect package. Reflection mak

    		•
  • Q : Define the term Identifier Define the

    Define the term Identifier: It is a programmer-defined name for a method, variable, class and interface.

    		•
  • Q : Explain Cohesion Cohesion : The level

    Cohesion: The level to which a component executes a single well-stated task. A strongly cohesive technique, for example, will execute a single task, like adding an item to a data structure, or sorting several data, while a weakly cohesive technique wi

    		•
  • Q : Types of rings in CPU Name the

    Name the different kinds of rings presented in CPU?

    		•
  • Q : Acknowledge inside a transaction Normal

    Normal 0 false false

  • Q : Define Bootstrap classes Bootstrap

    Bootstrap classes: The classes which make up the Java Platform Core Application Programming Interface (API), like those found in the java.lang, java.io and java.io packages.

    		•
  • Q : Define the term Key value Define the

    Define the term Key value: The object employed to produce an associated hash code for look-up in an associative data structure.

    		•
  • Q : Define Anonymous object Anonymous

    Anonymous object: An object formed without an identifier. They are generally formed as array elements, actual arguments or method outcomes. For example:     private Point[] vertices = { &n

    		•