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

Explain the threadswitchwithdelay function used in netware, Explain the Thr...

Explain the ThreadSwitchWithDelay Function used in Netware ThreadSwitchWithDelay( )   This command is used when threads are waiting for an event or resource but don't want t

Differences among user-level threads and kernel-level thread, What are two ...

What are two differences among user-level threads and kernel-level threads? Under what circumstances is one type better than the other? (1) User-level threads are unknown by th

Process execution priorities, Priority Scheduling leads to the risk of star...

Priority Scheduling leads to the risk of starvation: a process is ready, but never is given the processor. Some preemptive priority schedulers therefore reserve a fraction of the p

What is an effector process, What is an effector process? The effector ...

What is an effector process? The effector process is a method that verifies itself.The effector process exists in particular criteria.

What is co-operative process, What is co-operative process? A process i...

What is co-operative process? A process is co-operating if it can influence or be affected by the other processes implementing in the system. Any process that share data with o

What does verification represent, What does Verification represent? Ver...

What does Verification represent? Verification shows the set of activities that are carried out to confirm that the software correctly executes the specific functionality.

What are race conditions?, What are race conditions? Race conditions ar...

What are race conditions? Race conditions are problems that take place due to the sharing of the same file by several processes. In such a case none of the processes is able to

Deadlock detection, Deadlocks can be detected while the program is running,...

Deadlocks can be detected while the program is running, by running cycle detection algorithms on the graph that de?nes the current use of resources. De?ne this graph as follows:

Explain threads for executing concurrent application code, Explain Threads ...

Explain Threads for Executing Concurrent Application Code The thread has been introduced in many operating systems as an efficient mechanism for executing concurrent applicatio

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