Explain resource allocation graph, Operating System

Assignment Help:

RESOURCE ALLOCATION GRAPH

When a process Pi wishes an instance of resource type Rj, a request edge is inserted in the resource allocation graph. When this request is able to be fulfilled, the request edge is immediately transformed to an assignment edge. When the process no longer requires access to the resource, it liberate the resource as a result the assignment edge is deleted.

Process states:

  • Process p1 is embrace an instance of r2 and is waiting for an instance of r1.
  • Process p2 is embrace an instance of r1 and an instance of r2 and is waiting for an instance of r3.
  • Process p3 is embracing an instance of r3.

If there is a cycle in the reallocation graph then there is deadlock, else no.

 

 


Related Discussions:- Explain resource allocation graph

What is the hardware support required to implement paging, What is the hard...

What is the hardware support required to implement paging? Each operating system has its own techniques for storing page tables. The majority allocates a page table for each pr

Backup and recovery, what is it all about? why do we need? what are the typ...

what is it all about? why do we need? what are the types of backup? how is it done in unix?

What is a buddy system?, What is a buddy system? We are dividing the me...

What is a buddy system? We are dividing the memory as powers of two therefore the division will be 2, 4, 8, 16, 32, 64, 128, 256...i.e. in powers of 2 as well as we are selecti

Define drawback of distributed systems, Define drawback of Distributed syst...

Define drawback of Distributed systems Reliability is a drawback of Distributed systems

What is process migration, Question: (a) Describe blocking and non-bloc...

Question: (a) Describe blocking and non-blocking types of inter-process communication. What is easier to implement and why? Discuss their relative advantages and disadvantage

Implementation of locks, How could we implement locks? No matter how we cho...

How could we implement locks? No matter how we choose to implement them, we must have some hardware support. One possibility for implementing locks on a uniprocessor machine is is

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

Explain how the system can deal with the starvation problem, Q. Can a syste...

Q. Can a system detect that some of its processes are starving? If you answer "yes," explain how it can. If you answer "no," explain how the system can deal with the starvation pro

Explain the fork function, Explain the Fork Function Fork function caus...

Explain the Fork Function Fork function causes a new process to be created. The calling progress is duplicated as an exact copy (called the child process) that differs only in

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