--%>
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 : Write a program using simple loop

    Objective:  The purpose of this problem is to gain experience with the principles necessary to write a program using simple loop, decision processing, counters and accumulators Save the Barns, a bi-partisan po

    		•
  • Q : What is Search path Search path : It is

    Search path: It is a list of folders (that is, directories) to be searched - for a program or class, for example.

    		•
  • Q : Illustrates the parts of an XML

    Illustrates the parts of an XML document are case-sensitive.

    		•
  • Q : State the term multi tasking State the

    State the term multi tasking.

    		•
  • Q : Define Formal argument Formal argument

    Formal argument: The definition of a method’s argument is the part of a method header. Each and every formal argument has an associated type. Whenever a method is called, the actual argument values are copied into the analogous formal arguments.

    		•
  • Q : What is SLAM SLAM is a Microsoft

    SLAM is a Microsoft project that blurs the line between static analysis and model checking and deductive reasoning. The main goal of SLAM is to check temporal safety properties of C programs (it actually checks that a program correctly uses the interf

    		•
  • Q : Explain Method overriding Method

    Method overriding: It is a method stated in a super class might be overridden by a method of similar name stated in a sub class. The two methods should have similar name and number and types of formal arguments. Any checked exception thrown by sub-cla

    		•
  • Q : Define Package Package : The named

    Package: The named grouping of classes and interfaces which gives a package namespace. Classes, interfaces and class members devoid of an explicit public, protected or private access modifier {access!modifier} encompass package visibility. The public

    		•
  • Q : How XML web services integrate two

    How can XML web services integrate two legacy distributed systems, one based on Corba and one based on Java RMI?

    		•
  • Q : What is a Port Port: It is a number

    Port: It is a number employed by a procedure to communicate with the other procedure across a network, employing the Transmission Control Protocol (abbreviated as TCP) or User Datagram Protocol (abbreviated as UDP), for instance.

    		•