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

System call, how the system call is work?

how the system call is work?

What are the reasons for process suspension, Q. What are the reasons for pr...

Q. What are the reasons for process suspension? Reasons for process suspension 1.  Swapping 2.  Timing 3.  Interactive user request 4.  Parent process request

Process creation, what is process creation and how to create a process

what is process creation and how to create a process

Explain lru approximation page replacement in detail, LRU approximation pag...

LRU approximation page replacement In this we utilize the reference bit associated with the page entry to choose a page to be removed. The various algorithms used for the imp

Calculate the number of processes to avoid race condition, To evade race co...

To evade race condition, the maximum number of processes that may be at the same time inside the critical section is The maximum number of processes which may be at the same t

Process destruction, Most process abstractions support processes being dest...

Most process abstractions support processes being destroyed when the program terminates, or in response to a specific kill directive. There are two common implementations, one a "p

Process states in linux, Process states in Linux OS Running:  Process ...

Process states in Linux OS Running:  Process is either ready to run or running Interruptible:  a Blocked part of a process and waiting for a signal or an event from anothe

Interpreters, Use and overview? Pure and impure interpreter?

Use and overview? Pure and impure interpreter?

Multiprogramming., In a multiprogramming and time sharing environment sever...

In a multiprogramming and time sharing environment several users share the system simultaneously .what are two such problems?

Aggregate planning, Prepare a report that motivates alternatives reactive s...

Prepare a report that motivates alternatives reactive strategies that can be used by wind Mud clothing factory

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