--%>
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 : Alice 2.2 bucking bronc How do i create

    How do i create the bucking bronco in alice 2.2

    		•
  • Q : Define Unbounded repetition Unbounded

    Unbounded repetition: The repetition where statements in a loop's body are executed an arbitrary number of times, according to the consequences of the statements in the loop's body. All of the loop control structures in the Java offer for unbounded re

    		•
  • Q : What is Super type Super type : It is a

    Super type: It is a type with a child sub type. The sub-type or super-type relationship is more common than the sub-class or super-class relationship. An interface which is implemented by the class is a super type of the class. The interface which is

    		•
  • Q : Define the term RGB Color Model Define

    Define the term RGB Color Model: It is a color model based on representing a color as three components: green, red, and blue.

    		•
  • 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 : Explain Inheritance hierarchy

    Inheritance hierarchy: The relationship among super-classes and sub-classes is termed as an inheritance hierarchy. The single inheritance of classes means that each and every class has simply a single `parent' class and that Object class is the eventu

    		•
  • Q : When does a name clash take place in

    When does a name clash take place in programming?

    		•
  • Q : Explain SQA personnel regarding

    Do you think that the role of SQA personnel regarding inspections or testing?

    		•
  • Q : What is a Method body What is a Method

    What is a Method body: It is a body of a method: everything within the outermost block of the method.

    		•
  • Q : Define the term Binary Binary : This is

    Binary: This is the number representation in base 2. In base 2, only digits 0 and 1 are utilized. Digit positions symbolize successive powers of 2.

    		•