--%>
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 : Intermediate language concept Describe

    Describe the term Intermediate language? Illustrate in brief.

    		•
  • Q : Define the reasons of Process Handle

    Define the reasons of Process Handle Table.

    		•
  • Q : Explain the distributed systems Explain

    Explain the distributed systems.

    		•
  • Q : What is an Internet Service Provider

    Internet Service Provider: It is an Internet Service Provider (abbreviated as ISP) gives connections to the Internet for users who do not contain their own network. The ISP gives such user with their own IP address which enables them to interact with

    		•
  • Q : Define the term Interprocess

    Define the term Interprocess communication: It is the ability of two or more separate processes to communicate with each other.

    		•
  • Q : What is Datagram Datagram : It is a

    Datagram: It is a packet of information passed between the two communicating procedures across a network. Both the Transmission Control Protocol (abbreviated as TCP) and the User Datagram Protocol (abbreviated as UDP) are indirectly comprised in sendi

    		•
  • Q : Define Well-known port Well-known port

    Well-known port: It is a port number at which a server provides a familiar service. For example, 80 is well-known port number for the servers employing the HyperText Transfer Protocol (abbreviated as HTTP).

    		•
  • Q : Generating uniform random numbers using

    In .NET, write a simple web service in C# to generate uniform random numbers. Use the class System.Random to generate the random numbers. What part of the code is specifically associated with web services? How could you deploy the web service?

    		•
  • Q : Define CORBA Define CORBA ? What does

    Define CORBA? What does it do?

    		•
  • Q : Explain While loop While loop: It is

    While loop: It is one of Java's three control structures employed for looping. The other two are: do loop and for loop. The while loop comprises of a Boolean expression and a loop body. The condition is tested prior to the loop body is entered for the

    		•