--%>
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 : Overloading and overriding in the

    Illustrate the difference between overloading and overriding in the programming language?

    		•
  • Q : Explain Aggregation Aggregation : It is

    Aggregation: It is a relationship in which an object has one or more other subordinate objects as portion of its state. The subordinate objects usually have no self-governing existence separate from their containing object. Whenever the containing obj

    		•
  • Q : How can you highlight several goodies

    How can you highlight several goodies or addons the Orbeon?

    		•
  • Q : What is Runtime stack Runtime stack :

    Runtime stack: It is a stack structure maintained by the Java Virtual Machine which records that methods are presently being executed. The most of late entered technique will be at the top of the stack and the main technique of an application will be

    		•
  • Q : Define Method header Method header : It

    Method header: It is the header of a method, comprising of the method name, its outcome type, formal arguments and any exceptions thrown. Also termed as a method signature.

    		•
  • Q : Features of WordPress Normal 0 false

    Normal 0 false false

  • Q : Define the term Inheritance Inheritance

    Inheritance: It is a feature of object-oriented programming languages in which a sub-type inherits methods and variables from its super-type. The Inheritance is most generally employed as a synonym for class inheritance {class!inheritance}, however in

    		•
  • Q : What is an Arithmetic expression

    Arithmetic expression: It is an expression comprising numerical values of integer or floating point kinds. For example, operators like +, -, *, / and % get arithmetic expressions as their operands and generate arithmetic values as their outcomes.

    		•
  • Q : Explain For loop For loop : This is one

    For loop: This is one of the Java's three control structures employed for looping. The other two are while loop and do loop. A for loop includes of a loop header and a loop body. The header comprises of three expressions separated by two semicolons an

    		•
  • 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.

    		•