--%>
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 : Define Java 2 SDK Java 2 SDK : It is a

    Java 2 SDK: It is a particular implementation of the abstract functionality explained in Sun's specification of Java 2 Platform.

    		•
  • Q : Class and Object and explain diverse

    Q. Define class and object with example and explain diverse specifies.  

    		•
  • 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 : Define White space White space :

    White space: Characters employed to make visual spacing in a program. White spaces comprise space, tab, carriage return and the line feed characters.

    		•
  • Q : Define Livelock Livelock : It is a

    Livelock: It is a situation in which a thread waits to be notified of a condition however, on waking, finds that the other thread has inverted the condition another time. The primary thread is forced to wait again. Whenever this occurs for an indefini

    		•
  • Q : Define the term Manifest file Define

    Define the term Manifest file: It is a file which is held in a Java Archive (JAR) file, explaining the contents of the archive.

    		•
  • Q : State the term VHDL or Verilog State

    State the term VHDL or Verilog? Answer: VHDL is extremely high speep integrated chips hardware descripted language as well as verilog is use to verify logic.

    		•
  • Q : Describe Method Method : The portion of

    Method: The portion of a class definition which implements some of the behavior of objects of the class. The body of the method includes declarations of local variables and statements to execute the behavior. The method receives input through its argu

    		•
  • Q : What is Character Set What is Character

    What is Character Set. Briefly explain it?

    		•
  • Q : Explain Infinite loop Infinite loop :

    Infinite loop: The loop whose termination test never computes to false. At times this is a deliberate act on the portion of the programmer, employing a construct like:         whi

    		•