Explain about deadlocks, Operating System

Assignment Help:

Q. Explain about Deadlocks?

Deadlocks

for (int i = 0; i < n; i++) {

// first find a thread that can finish

for (int j = 0; j < n; j++) {

if (!finish[j]) {

boolean temp = true;

for (int k = 0; k < m; k++) {

if (need[j][k] > work[k])

temp = false;

}

if (temp) { // if this thread can finish

finish[j] = true;

for (int x = 0; x < m; x++)

work[x] += work[j][x];

}

}

}

}

At present there are two resources available. It is an system is in an unsafe state as process P1 could complete thereby freeing a total of four resources. But we can't guarantee that processes P0 and P2 can complete. Nevertheless it is possible that a process may release resources before requesting any further. For instance process P2 could release a resource thereby increasing the total number of resources to five. This permit process P0 to complete which would free a total of nine resources thereby allowing process P2 to complete as well.


Related Discussions:- Explain about deadlocks

What are the issues in designing a network-fault tolerance, Fault tolerance...

Fault tolerance : Machine failures, Communication faults, storage device crashes, and decays of storage media must be tolerated by the system to some extent. A fault tolerant sy

Explain secondary-storage management, What are the three main activities of...

What are the three main activities of an operating system in regard to secondary-storage management? a) Free-space management. b) Storage allocation. c) Disk scheduling.

Create a gantt chart for scheduling algorithms, Question: (a) The follo...

Question: (a) The following table (table 1.0) gives the length of the CPU burst time in milliseconds of processes P 1 to P 4 . Assume the processes arrived in the order P 1 ,

Address operator and pointers, We are use to using variables within C witho...

We are use to using variables within C without thinking about where they are stored. Most variables are dynamic i.e. can change, therefore they are stored in Ram, unlike a program

Processes and threads, Processes and threads each have their place in multi...

Processes and threads each have their place in multi-programming, generally to hide latency and to maximize CPU utilization. With the continuing spread of multi-core processors in

Principles of operating systems, Objective - Tiny Shell (tish) In this...

Objective - Tiny Shell (tish) In this exercise you will write a small shell program to run different programs in foreground and background mode. Background Usually when

What is the translation lookaside buffer, What is the Translation Lookaside...

What is the Translation Lookaside Buffer (TLB) In a cached system, the base addresses of the last few referenced pages is maintained in registers known as the TLB that aids in

Define the main reason to encrypt a file, Define the Main reason to encrypt...

Define the Main reason to encrypt a file Major reason to encrypt a file is secure it for transmission.

What are turnaround time and response time, What are turnaround time and re...

What are turnaround time and response time? Turnaround time is the interval among the submission of a job and its completion. Response time is the interval among submission

Explain the architecting for processes, Explain the Architecting For Proces...

Explain the Architecting For Processes Processes are very important to the server application developer, as they may be used to increase responsiveness, deduction time, and tur

Write Your Message!

Captcha
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!

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