Deadlock in operating system with real life example.pptx

Deadlock necessary conditions
Deadlock prevention
Deadlock avoidance

1. Understanding Deadlock in nn
Operating Systems

Concept of Deadlock , Necessary Conditions for Deadlock and Handling
Deadlock

2. Understanding
Deadlock in
Operating

Systems

An Overview of Deadlock and Its
Management

© Definition of Deadlock

Deadlock occurs when two or more processes are unable to proceed because each is waiting
for the other to release resources.

© Significance in Operating Systems
Understanding deadlock is crucial as it can lead to resource wast
ifnot managed properly.

nd system inefficiency

© Strategies for Managing Deadlock
Deadlock can be managed through prevention, avoidance, detection, and recovery
techniques.

3. Four Necessary Conditions for Deadlock

Understanding the key components that lead to deadlock

ML Mutual Exctusion
Ti

€) 42 one resource must beheld ina nor sharesble mode, preventing others from using

Hold and Wait
A process holding resources is waiting to acquire additional resources, potentially causing a wait condition.

No Preemption

Resources cannot be forcibly taken from processes until they voluntarily release them, which can lead to deadlock.

Circular Wait
A circular chain of processes exists where each is waiting for a resource held by the next, creating a deadlock scenario.

4. Deadlock Prevention Strategies Overvie
‘Strategies to Mitigate Deadlgck'in Systems \

sharing to minimize
deadlock chances.

5. Deadlock Avoidance Techniques

Understanding Resource Allocation Graphs

Understanding Resource Allocation

‘Graphs visually represent processes and
resources in a system.

Identifying Cycles in Graphs
A cycle indicates potential deadlock, requiring
careful resource management.

Visual Representation
Each process and resource is a node, with
‘edges showing allocation and requests.

6. Deadlock Detection: Algorithms and Techniques

Understanding algorithms for detecting deadlocks in systems

Detection Algorithms
Algorithms that identify deadlocks by checking for cycles in the wait-for graph.

Wait-For Graph
A directed graph showing processes as nodes and wait relationships as edges.

7. Techniques for Deadlock Recovery

Essential Techniques and Considerations for System Recovery

Process Termination
‘Abort one or more processes to resolve deadlock situations effectively.

Resource Preemption
Temporarily reclaim resources from certain processes to alleviate the deadlock.

Termination Criteria
Select processes to terminate based on priority, resource use, and wait time.

Performance Impact
Ensure that the recovery methods minimally affect overall system performance.

8. Understanding Real-World Deadlocks

orld Deadlock Cases

Example 1: Database

Diagram of Real-World

Deadlock Deadlock

rating for each
sources, leading to

Refer to the di
in real-world scenar

9. Understanding Deadlock Management

Recognizing and Managing Deadlocks Effectively

@ critical Nature of Deadlocks
Deadlocks can halt processes in an operating system, impacting system
performance,

© Conditions Leading to Deadlocks
Understanding the necessary conditions for deadlock occurrence is crucial
for prevention.

© types of Deadlocks
Different types of deadlocks exist, each requiring specific strategies for
management.

© Prevention Strategies
‘Implementing strategies can help prevent deadlocks from occurring in the
first place.

© avoidance Techniques
Avoidance techniques can be employed to ensure deadlocks are less likely
tohappen.

© recovery Methods
Recovery methods must bein place to handle deadlocks if they do occur.

© Real-World Examples
Case studies illustrate the importance of effective deadlock management
ae