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

Explain the types of system calls, Explain the Types of System Calls Th...

Explain the Types of System Calls The major types of system calls are like this: a. Process Control: These types of system calls are employed to control the processes.

Write a note on multithreading, Write a note on multithreading. Multith...

Write a note on multithreading. Multithreading is the capability of an operating system to execute different parts of a program called as threads, at the same time. The program

Define what an assembler is, Define what an assembler is An assembler i...

Define what an assembler is An assembler is machine dependant.

DMA block diagram, I need help,i want a brief and easy explanation to under...

I need help,i want a brief and easy explanation to understand and write in exams and easy to understand topic of DMA block diagram which Is of I/O management and scheduling? can u

Data races, Research the phenomenon of data races. Give an example of how...

Research the phenomenon of data races. Give an example of how an unprotected data race can give rise to data inconsistency. How do OpenMP and Cilk resolve this problem? Data

Explain the protection problems, Q. In some systems a subdirectory is able...

Q. In some systems a subdirectory is able to be read and written by an authorized user just as ordinary files can be. a. Explain the protection problems that could arise. b.

How does communication takes place in a distributed system?, How does commu...

How does communication takes place in a distributed system? Distributed systems depend on the networking for their functionality. A network is a communication path among two

What is a semaphore, What is a semaphore? A semaphore 'S' is a synchron...

What is a semaphore? A semaphore 'S' is a synchronization tool which is  an integer value that, apart from initialization, is accessed only by two standard atomic operations; w

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