--%>
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 no-arg constructor no-arg

    no-arg constructor: It is a constructor which takes no arguments. By default, each and every class without an explicit constructor has a default no-arg constructor with the public access. Its role is entirely to invoke the no-arg constructor of the in

    		•
  • Q : What is Client Client : It is a user of

    Client: It is a user of a service. The Web client requests resources from Web server, for example: Whenever the client is an object then this is the sender of messages to its object servers.

    		•
  • Q : Acknowledge inside a transaction Normal

    Normal 0 false false

  • Q : Explain Look-and-feel Look-and-feel :

    Look-and-feel: The visual impression and interaction style given by a user interface. This is mainly the responsibility of the window manager (that is, in collaboration with the fundamental operating system) running on a specific computer. This refers

    		•
  • Q : Maximum clock frequency of the circuit

    What do you mean by the term set up time and hold time constraints? Explain what do they mean? Which one is vital for estimating the maximum clock frequency of the circuit?

    		•
  • Q : Define Sign bit Sign bit : In

    Sign bit: In 2s-complement notation, the most important bit in an integer value is employed to determine the sign of the value. A 1-bit point out a negative number and a 0 bit point out a positive number.

    		•
  • Q : Program to controls a quiz show in C++

    Foundations of Computer Science In this project, we will write a program that controls a quiz show, much like the many popular TV shows. The program will read in a group of questions and thei

    		•
  • Q : Explain script recorded over tested web

    Why is the script recorded over the tested web pages not playback correctly?

    		•
  • Q : Edit things in Moodle Normal 0 false

    Normal 0 false false

  • 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

    		•