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

Briefly discuss on i/o hardware, Briefly discuss on I/O hardware? A con...

Briefly discuss on I/O hardware? A controller is a collection of electronics that can operate a port, a bus, or a device. A serial-port controller is an easy controller. It is

Explain about paging, Explain about paging? Answer: Paging is a memory-...

Explain about paging? Answer: Paging is a memory-management scheme that permits the physical-address space of process to be noncontiguous. Paging avoids the considerable proble

Advanced synchronization, Synchronization serves two purposes: 1) to ensure...

Synchronization serves two purposes: 1) to ensure safety for updates on shared data (e.g. to avoid races conditions), and 2) to coordinate and order actions taken by threads (e.g.

SCAN SHUDULLING, EXPLAIN THE SCAN SHUDDULING WITH DIAGRAM

EXPLAIN THE SCAN SHUDDULING WITH DIAGRAM

Explain the concept of reentrancy, Concept of Reentrancy   It is a ...

Concept of Reentrancy   It is a useful, memory-saving method for multiprogrammed timesharing machines. A Reentrant method is one in which multiple clients can share a singl

Batch oriented and interactive operating system., properies of Batch orient...

properies of Batch oriented and interactive operating system.

What do you mean by semaphore?, What do you mean by semaphore?  Semap...

What do you mean by semaphore?  Semaphore : A synchronization variable that acquires on positive integer values. Invented by the Dijkstra P (semaphore): an atomic proce

Explain what isam, Explain what ISAM is. Indexed sequential access meth...

Explain what ISAM is. Indexed sequential access method. The file is stored in sorted order. ISAM has a master index file, indicating in what part of another index file the key

Define loader that executed when system is first turned on, Define a loader...

Define a loader that is executed when a system is first turned on or restarted? Bootstrap loader is executed when a system is first turned on or restarted

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