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 spooling, What is spooling? Spooling overlaps the I/O of single...

What is spooling? Spooling overlaps the I/O of single job with the computation of other jobs.

Explain about file allocation methods, Explain about file allocation method...

Explain about file allocation methods? The main problem in direct-access nature is how to assign space to these files so that disk space if utilized effectively and files can b

What is preallocation, What is preallocation? Why do it? Allocating spa...

What is preallocation? Why do it? Allocating space for a file before making the file to allow for expansion. This reserves space for a certain file so that other files can't gr

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?

Deadlock, Suppose we have 3 processes running at the same time as shown in ...

Suppose we have 3 processes running at the same time as shown in the following table. Each resource only has one instance. Show a possible scenario of resource allocation that r

Explain fifo page replacement, Explain FIFO page replacement A FIFO rep...

Explain FIFO page replacement A FIFO replacement algorithm associates with every page the time when that page was brought into memory. When a page must be changed, the oldest p

Application of consumer behaviour, Q. Explain application of consumer behav...

Q. Explain application of consumer behaviour? Consumer behaviour is described as the dynamic interaction of affect and cognition and behaviour and the environment by human bein

What are the five major activities of an operating system, What are the fiv...

What are the five major activities of an operating system in regard to process management? The creation and deletion of both user and system processes The suspension and res

What is a relocatable program, What is a Relocatable program? The Reloc...

What is a Relocatable program? The Relocatable programs can be loaded almost anywhere in memory.

Briefly explain the process management in unix., Briefly explain the proces...

Briefly explain the process management in UNIX. UNIX makes use of the easy but powerful process facility that is visible to the user. UNIX follows the model in which the majori

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