Ask Question, Ask an Expert


Ask Programming Language Expert

problem1. describe why interrupts are not appropriate for implementing synchronization primitive in multiprocessor systems and why spinlocks are not appropriate for single-processor systems yet are often used in multiprocessor systems.

Mutual exclusion primitives can be implemented with busy waiting or with blocking. Discuss the applicability and relative merits of each approach.

Synchronization within monitors uses condition variables and two special operation wait and signal. A more general form of synchronization would be to have a single primitive, waituntil, that had an arbitrary boolean predicate as a parameter. Thus, one could say, for ex waituntil x < 0 or y+z < nThe signal primitive would no longer be needed. This scheme is clearly more general, but it is not used. Why not? Hint, think about the implementation.

Suppose there are 2 threads T1, T2. Please describe if the following solution provides the correct synchronization for critical section that satisfies three conditions:  mutual exclusion, bounded wait and make progress.

problem5. Please prepare the pseudocode for the following problems:

1. Semaphore operation wait() and signal() implemented using block waiting.

2. Consider a pizza store which has 10 seats. A customer comes to buy pizza. If there is any unsold pizza left in the kitchen, he can get it immediately. If not, (s)he  need wait for chef to make one. After the customer gets the pizza, (s)he will grab a seat and start eating. If there is no seat, (s)he needs to wait. When (s)he finishes eating, (s)h will left the store. The chef in the kitchen just keeps making pizza. However, (s)he stops if there are 5 unsold pizza left in the kitchen. If a customer come to buy one, (s)he resumes the work to make new pizza. Please prepare pseudocode for both customer and chef using semaphore to solve this problem, and synchronize chef and customers.

Programming Problem:  

problem6. prepare a multi-threaded program to solve producer and consumer problem.

- There are two types of worker thread: producer and consumer. A producer thread randomly generate an integer between 0-100 (You can use random()/srandom()  or drand48()/srand48() to generate random number in C), and put it into the buffer. A consumer thread simple take the first integer from the buffer. A circular array should be used for the buffer. You do not need loop for both types of thread. Each thread will exit after only consuming or producing one item (only once).

- Assume total number of worker thread is 20, and buffer size is 10. Your program should randomly generate the number of producers and consumers. Their relationship should be : num_producers + num_consumers = num_threads, num_producer - num_consumer <= buffer_size, num_consumer <= num_producer, so that no thread will be blocked forever.  The order between consumer and producer threads should be arbitrary. For ex, you shall not generate all producers (consumers) and then all consumers (producers).  (5 points)

- Synchronize the producer and consumer.  

- You can choose any type of language (e.g. C/C++/Java) to implement this program.

Your output will look like the following:  

Number of producer: 12 Number of consumer: 8
Thread 0 produce 63 in buffer 0, current number of items is 1
Thread 1 consume item 63 in buffer 0, current number of items is 0
Thread 3 produce 45 in buffer 1, current number of items is 1
Thread 5 produce 88 in buffer 2, current number of items is 2
Thread 4 consume item 45 in buffer 1, current number of items is 0

There are still 4 items left in the buffer: 96,26,52,81

- Please check blackboard for more reference about pthread library if you choose to use it.

- Please submit all source code and a simple readme file on how to compile your code and the sample output. Please zip all files into a single zip file and submit through blackboard.

You can choose any of the following problems:

problem7. prepare a program to simulate pizza store problem in problem 3.2.

problem8. Describe how spinlock is implemented in Linux kernel and how/where it is used? Please give some concrete exs, e.g. list the data structure/functions related to spinlock implementation, describe the code of some spinlock functions, and describe how to use these functions for synchronization, list the functions that use spinlocks and their purpose.

Programming Language, Programming

  • Category:- Programming Language
  • Reference No.:- M9870
  • Price:- $55

Guranteed 36 Hours Delivery, In Price:- $55

Have any Question? 

Related Questions in Programming Language

Complete the below two problems each problem is a separate

Complete the below two problems. Each problem is a separate program (project). Question 1 Write a program that calculates and prints the monthly paycheck for an employee. The net pay is calculated after taking the follow ...

Design and implement your own simple class to represent any

Design and implement your own simple class to represent any household item of your choice (toaster, fan, hair dryer, piano ...) Your class should have a constructor, one additional method and at least one member variable ...

Write a program where you create a class called bankaccount

Write a program where you create a class called BankAccount. The BankAccount class should contain a String to store the customer name and a double to store the account balance. The BankAccount class should have two const ...

Assignment problem missing number gamewrite the missing

Assignment Problem: Missing Number Game Write the Missing Number Game Program. You will write a program that will allow a user to play the missing number game.  The game will display a 4 (rows) x 3 (columns) board of num ...

Creating methodssince you have created the data objects for

Creating Methods Since you have created the data objects for Harbor View Mooring, you now need to create processes associated with each object. In order to keep with good object-oriented practices of implementation hidin ...

Assignmentwrite a narrative describing the objective of the

Assignment Write a narrative describing the objective of the program, and what each routine will do, including the reason for and purpose of the array(s), in addition to the selection statement and use of iterations Expl ...

Assignmentquestion 1consider the following class the

Assignment Question 1 Consider the following class. The purpose of each block of code within the class is written in comments within the code. But the following class contains a number of errors. Errors can occur at comp ...

Programming computer science assignmmentprogramming1

Programming Computer Science Assignmment Programming 1) Explain the difference between an event and an event handler. Provide at least two examples of an event. 2) Explain how an animation uses still images and loops to ...

Note that these regular expressions give all of the

Note that these regular expressions give all of the following symbols (operator characters) a special meaning: \ " . - $ [ ] * + ? { } | / Their special meaning must be turned off if they are needed to represent them-sel ...

Lab ordered doublylinked listobjectivesto introduce the

Lab: Ordered DoublyLinked List Objectives: To introduce the doubly linked list data structure. Converting an implementation of singly-linked lists to an implementation of doubly-linked lists. Strengthen the students unde ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen