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

Create a very basic calculator map out the numeric keypad

Create a very basic calculator, map out the numeric keypad (17 buttons) and an EditText view. If text is given, prompt the user with a message that complains about the error. Toast.makeToast(getApplicationContext() , "er ...

Project instructionsinstructions complete the following two

Project Instructions Instructions: Complete the following two assignments as your final project. These two assignments review everything you learned from Chapters 1-8. Assignment 1 Write an application containing three p ...

The concepts discussed in this section can also be applied

The concepts discussed in this section can also be applied to eliminate partially dead code. A definition of a variable is partial ly dead if the variable is live on some paths and not others. We can optimize the program ...

Working at the gm used car dealership you need to create an

Working at the GM used car dealership you need to create an object oriented application to handle inventory. To start you create a detailed uml diagram that helps to plan your solution. Based on this uml diagram translat ...

The car classdefine a class called car that implements the

The Car Class Define a class called "Car" that implements the parameterized Comparable interface. Each object of this class represents a type of car. Your class must provide all the methods in the public interface. Be su ...

1 solve a simple payroll calculation find amount of pay

1. Solve a simple payroll calculation. Find amount of pay given hours worked and hourly rate. (pay = hourly rate * hours worked.) Run this values (hours = 30 and rate = 8.52) and with (hours = 53 and rate = 11.54). Show ...

Assignment programming project expression treesthis project

Assignment Programming Project: Expression Trees This project deals with a simple kind of expression trees, in which there are two kinds of nodes: (a) Leaf nodes, which contain a real number as their clement; and (b) Non ...

Assignmenta finance company provides loans for motorcycles

Assignment A finance company provides loans for motorcycles at different rates depending on how much the total loan amount is and how many payments will be made on the loan. Using the information in the table below, writ ...

Complete case programming assignment at the end of chapter

Complete Case Programming Assignment at the end of Chapter 4, page 283. Be sure to create an event planning document for each event in the program prior to writing code. Write the code that will execute the program requi ...

Spreadsheet exercise1 run the spreadsheet program in your

Spreadsheet Exercise 1. Run the spreadsheet program in your computer and type the following:   A B C D E F 1 PAYROLL 2 XYZ COMPANY Employee Name Department Degree Salary Need Increase? 3 Nasser Mechanical Master 15000   ...

  • 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

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

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