Customer Service Chat
Get quote & make Payment
what is deadlock ?Differentiate two types of resources ?, Basic Computer Science
• A set of process is in a deadlock state if each process in the group is waiting for an event that can be caused by only another process in the set. In other words, each member of the group of deadlock processes is waiting for a resource that can be released only by a deadlock process. Not any of the processes can run, none of them can release any resources, and not any of them can be awakened. It is significant to note that the number of processes and the number and kind of resources possessed and requested are unimportant.
• The simplest instance of deadlock is where process 1 has been allocated non-shareable resources A, say, a tap drive, and process 2 has be owed non-sharable resource B, say, a printer. At present, if it turns out that process 1 needs resource B (printer) to proceed and process 2 needs resource A (the tape drive) to proceed and these are the only two processes in the system, each one is blocked the other and all valuable work in the system stops. This state is termed deadlock. The system is in deadlock state since each process holds a resource being requested by the other process neither process is willing to release the resource it holds.
• The resources may be either physical or logical. Instances of physical resources are Printers, Tape Drivers, Memory Space, and CPU Cycles. Instances of logical resources are Files, Semaphores, and Monitors.
• Preemptable and Nonpreemptable Resources
Resources come in two types: preemptable and nonpreemptable.
A preemptable resource is one that can be taken away from the process with no ill effects. Memory is an instance of a preemptable resource. Alternatively, a nonpreemptable resource is one that cannot be taken away from process (with no causing ill effect). For instance, CD resources are not preemptable at an arbitrary instant.
Reallocating resources can determine deadlocks that involve preemptable resources. Deadlocks that occupy nonpreemptable resources are hard to deal with.
Posted Date: 5/3/2012 1:18:06 AM | Location : United States
Ask an Expert
what is deadlock ?Differentiate two types of resources ?, Assignment Help, Ask Question on what is deadlock ?Differentiate two types of resources ?, Get Answer, Expert's Help, what is deadlock ?Differentiate two types of resources ? Discussions
Write discussion on what is deadlock ?Differentiate two types of resources ?
Your posts are moderated
Write your message here..
Rooted tree, Ask qu The figure below shows a rooted tree, 756_Find the hei...
Ask qu The figure below shows a rooted tree, 756_Find the height.png 1.1. Find the height/level of the tree as shown above?estion #Minimum 100 words accepted#
C programming, a cloth merchant A cloth showroom has announced the followin...
a cloth merchant A cloth showroom has announced the following seasonal discounts on purchase of items: Purchase amount Discount Mill items Handloom items 0-100 - 5% 101-200 5% 7.5%
Definition of algorithm , Definition of Algorithm An algorithm is a ...
Definition of Algorithm An algorithm is a design or plan of obtaining a solution to a problem. The solution is presented by listing all steps in which they are carried out.
Importance of good database design , Importance of Good Database Design Poo...
Importance of Good Database Design Poor database design may have results in unwanted data redundancy Poor database design keeps errors leading to bad decisions and results Practica
E-mail, E-MAIL: Internet has changed the art of writing letters to ema...
E-MAIL: Internet has changed the art of writing letters to email. Email is one of the ways on Internet to send messages to another person across the network. E-mail and posta
Bidirectional search-artificial intelligence, Bidirectional Search-Artifici...
Bidirectional Search-Artificial intelligence: We've concentrated so far on searches where the point of the search is to search a solution, not the path to the solution. In anot
Describe four types of abstracts, QUESTION 1 Write short notes on cont...
QUESTION 1 Write short notes on controlled vocabulary indexing. QUESTION 2 (a) List five types of abstracts. (b) Describe four types of abstracts. QUESTION 3
Multithread 1:1 Model, Given an operating system that supports a one – to ...
Given an operating system that supports a one – to –one relationship between user-level threads and kernel – level threads and allows one or more threads from a process to issue b
Create a queue, QUESTION (a) Give the representation of a queue as an a...
QUESTION (a) Give the representation of a queue as an abstract data type. (b) What is a priority queue? Give two types of priority queues. (c) The following program does
Human computer Interface, discuss waterfall
Accounting Assignment Help
Economics Assignment Help
Finance Assignment Help
Statistics Assignment Help
Physics Assignment Help
Chemistry Assignment Help
Math Assignment Help
Biology Assignment Help
English Assignment Help
Management Assignment Help
Engineering Assignment Help
Programming Assignment Help
Computer Science Assignment Help
Why Us ?
~24x7 hrs Support
~Quality of Work
~Time on Delivery
~Privacy of Work
Human Resource Management
Literature Review Writing Help
Follow Us |
T & C
Copyright by ExpertsMind IT Educational Pvt. Ltd.