--%>
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 to display its negative

    Write a program in object code that reads a single digit decimal number and displays its negative in binary.  To do this, you must first read the number as a character and then convert it to its numeric value, as discussed in class.  Then, you're going to change this to a negative numbe

    		•
  • Q : Describe Overriding for restriction

    Overriding for restriction: It is a form of method overriding in which the sub-class version of a method calls the super-class version first of all and then employs or manipulates the outcome or consequences of that call in some manner.

    		•
  • Q : ASP.NET Session handling How to set

    How to set Session time out in ASP.NET. I tries changing in config file but still facing issue. Please help..

    		•
  • Q : What is a Micro-chip Micro-chip : It is

    Micro-chip: It is a small electronic device employed to build computers and other electronic equipment. The chips are generally employed to supply the memory and processing components of the computer.

    		•
  • Q : Use Finite-State Space Abstractions Use

    Use Finite-State Space Abstractions: In order to successfully apply explicit-state model checking, defects must be detectable in a sufficiently small state space. This can be achieved either by means of heuristics that constrain the way the state spac

    		•
  • Q : Describe the Binders Briefly describe

    Briefly describe the Binders?

    		•
  • Q : Explain the java applets with a

      APPLET: an applet is an application designed to tra

    		•
  • Q : What is Lexicographic ordering

    Lexicographic ordering: It is the ordering of words as they would be easily found in a dictionary. It must be noted that dissimilar locales order identical looking words according to their own conventions - this exerts, in specific, to accented charac

    		•
  • Q : Commands used to create the files

    Specify different commands which are used in order to create the files?

    		•
  • Q : Define difference between write through

    Define the difference between write through and write back cache?

    		•