--%>
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 HyperText Markup Language

    HyperText Markup Language: The HyperText Markup Language (abbreviated as HTML) is a simple presentation language employed to markup the content of the Web pages. Its tags appear frequently in pairs to mark sections of text which must be represented in

    		•
  • Q : What is Classpath Classpath : The path

    Classpath: The path searched by interpreter and compiler for class definitions. The class path might be set by a command-line argument to either, or through an environment variable.

    		•
  • Q : Define Certificates Define Certificates

    Define Certificates: They are digital documents attesting to the binding of a public key to an individual or another entity. They permit verification of the claim which a given public key does in fact fit in to a given individual. The certificates hel

    		•
  • Q : What is Cascading if-else statement

    Cascading if-else statement: A form of if-else statement in which all else-part (apart from the last) comprises of a further nested if-else statement. Employed to overcome the trouble of textual drift frequently related with nested if statements.

    		•
  • Q : Data type conversion Data type

    Data type conversion: Conversion of one data type into the other data type. Two kind of conversion that is, A) Implicit Conversion: This is automatically taken care

    		•
  • Q : Use of setjmp and longjmp Use of

    Use of setjmp() and longjmp(): In C/C++, setjmp() saves the contents of the registers at a particular state in the program and longjmp() will restore that state later. In this way, longjmp() “returns” to the state of the program when setjm

    		•
  • Q : State the term SOAP and explain its

    State the term SOAP and explain its relation with XML.

    		•
  • Q : Simple Sorting Program in C Shell

    Assignment: Sorting You will write a simple sorting program. This program should be invoked as follows: shell% ./fastsort -i inputfile -o outputfile

    		•
  • Q : Explain the common uses of XML Explain

    Explain the common uses of XML.

    		•
  • Q : What do you mean by data movement What

    What do you mean by data movement? Describe in brief.

    		•