User Account

All Pages

Concurrent Programming, JAVA Programming

Assignment Help:
Problem 1
A savings account object holds a non-negative balance, and provides deposit(k )
and withdraw(k ) methods, where deposit(k ) adds k to the balance, and
withdraw(k ) subtracts k, if the balance is at least k, and otherwise blocks until
the balance becomes k or greater. getbalance() gives the current balance.
1. Implement this savings account using locks and conditions (use
java.util.concurrent.locks.ReentrantLock). Test by using the 3
functions.
2. Now suppose there are two kinds of withdrawals: ordinary and preferred.
Devise an implementation that ensures that no ordinary withdrawal occurs
if there is a preferred withdrawal waiting to occur.
Problem 2
Consider the following conditions: An enqueuer waiting on a full-queue or
a dequeuer waiting on an empty queue sleep indefinitely, unless woken up by
another thread. A thread must send a signal ONLY when it adds an element
to an empty queue or removes an element from a full-queue.
1. Implement a bounded partial queue using a signaling mechanism that
signals to all waiting dequeuers.
2. Implement the bounded partial queue by using a signaling mechanism
(your own scheme) that signals to only one waiting dequeuer or enqueuer,
and ensure that the lost-wake-up problem does not happen.
1
Problem 3
We have n threads, each of which executes method foo() followed by bar().
We want to add synchronization to ensure that no thread starts executing bar()
until all threads have finished executing foo(). To achieve this, we will insert
some barrier code between the two methods. Implement the following two
schemes for barrier code:
• Use a shared counter protected by test-and-test-and-set lock. Each thread
locks the counter, increments it, releases the lock, and repeatedly reads
the counter until it reaches n.
• Use an n-element Boolean array A. Initially all entries are 0. When thread
0 executes its barrier, it sets b[0] to 1, and repeatedly reads b[n - 1]
until it becomes 1. Every other thread i, repeatedly reads b[i - 1] until
it becomes 1, then it sets b[i] to 1, and repeatedly reads b[n - 1] until
it becomes 1.
Implement both these schemes in Java. Each of the methods foo() and
bar() just sleeps for 20 milliseconds. Test the two schemes for n = 16. Run
each scheme at least ten times, measure the total runtime in each test run,
discard the highest and lowest values, take the average, and use it to compare
the two schemes. Which performs better? Can you explain the reason? You
can run the experiments on ecen5033.colorado.edu. Submit the code as well as
experimental results.

Related Discussions:- Concurrent Programming

Implement the list calss, Your next task is to implement the MovieList clas...

Your next task is to implement the MovieList class that manages the details for a list of DVD Movies read from the specified data file. The constructor will include a parameter tha

Give an example of class or static members, Give an example of Class or sta...

Give an example of Class or static Members? Below is a Car class along with such a speedLimit field and getSpeedLimit() method. public class Car { private String licensePla

Alreadyboundexception thrown and by which method, When is AlreadyBoundExcep...

When is AlreadyBoundException thrown and by which method? Ans) AlreadyBoundException is thrown by bind(String name) method when a remote object is already registered with the re

Assignment, For this Assignment, submit the following program: Create an ap...

For this Assignment, submit the following program: Create an application for an animal-fur trimming service. The business is open 15 weeks of the year, from April through July. The

Explain different advice types in spring, 1) Around : org.aopalliance.inter...

1) Around : org.aopalliance.intercept.MethodInterceptor 2) Before : org.springframework.aop.BeforeAdvice 3)  After : org.springframework.aop.AfterReturningAdvice 4) Throws

Thread, create thread without extending anything

create thread without extending anything

Array, public class Tester { static void test(int[] a) { int[] b = new in...

public class Tester { static void test(int[] a) { int[] b = new int[2]; a = b; System.out.print(b.length); System.out.print(a.length); } public static void main(String[] arg

Develop a shopping carts application , To develop a shopping carts applicat...

To develop a shopping carts application for an online store of your choice Outcomes: 1. Apply the GUI components of Java and other tools to create user-friendly interfaces.

Arithmetic, 1-4 Problem Set: Arithmetic Consider the following statement wh...

1-4 Problem Set: Arithmetic Consider the following statement when responding to questions 1 and 2: Jim develops 5 Java applications a year. Joe develops 10 Java applications a year

Program for users to play the game of brick, Task Your task is  to  w...

Task Your task is  to  write  a  Java  program  that  allows  users  to  play  the  game  of  Brickles. (note:  it  is  up  to  you  whether  to  use the  skeleton).  The prog

Write Your Message!

Captcha
Order Assignment

Featured Services

Order Now

Popular Subjects

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +91-977-207-8620

Phone: +91-977-207-8620

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd