'Deadlock' diaporamas de présentation

Chapter 6 Concurrency: Deadlock and Starvation

Chapter 6 Concurrency: Deadlock and Starvation. Operating Systems: Internals and Design Principles. Operating Systems: Internals and Design Principles.

876 views • 69 slides

Behavioral Design

Behavioral Design. Topics in Behavioral Design. Based on Material in [Rosenblum94][Budgen94] [Ghezzi91] [Harel88]. Behavioral Design Topics. State Transition Diagrams Petri Nets Higraphs and Statecharts. State Transition Diagrams. State Transition Diagrams (STD).

860 views • 59 slides

High Performance Computing: Concepts, Methods & Means MPI: The Message Passing Interface

High Performance Computing: Concepts, Methods & Means MPI: The Message Passing Interface. Prof. Daniel S. Katz Department of Electrical and Computer Engineering Louisiana State University February 22 nd , 2007. Topics. Introduction MPI Standard MPI-1.x Model and Basic Calls

839 views • 58 slides

High Performance Computing: Concepts, Methods & Means Parallel Threads Computing

High Performance Computing: Concepts, Methods & Means Parallel Threads Computing. Prof. Thomas Sterling Department of Computer Science Louisiana State University February 6 th , 2007. Topics. Introduction Performance: CPI and memory behavior Overview of threaded execution model

867 views • 57 slides

Object-Oriented Software Engineering Practical Software Development using UML and Java

Object-Oriented Software Engineering Practical Software Development using UML and Java. Chapter 10: Testing and Inspecting to Ensure High Quality. 10.1 Basic definitions. A failure is an unacceptable behavior exhibited by a system The frequency of failures measures the reliability

730 views • 52 slides

A Randomized Dynamic Program Analysis for Detecting Real Deadlocks

A Randomized Dynamic Program Analysis for Detecting Real Deadlocks. Koushik Sen CS 265. What is a Deadlock?. An unintended condition in a shared-memory, multi-threaded program in which: a set of threads blocks forever

548 views • 44 slides

Lecture 7 on Database Concurrency Control

Lecture 7 on Database Concurrency Control.

813 views • 38 slides

CH 3 Deadlock

CH 3 Deadlock. When 2 (or more) processes remain blocked forever !. Process a Down x Gets x Down y Blocks. Process b Down y Gets y Down x Blocks. How can this happen?. Both are blocked forever !. Resources. Things for which we request exclusive access.

671 views • 34 slides

Deadlock

Deadlock. Examples: Traffic Jam : Dining Philosophers Device allocation process 1 requests tape drive 1 & gets it process 2 requests tape drive 2 & gets it process 1 requests tape drive 2 but is blocked process 2 requests tape drive 1 but is blocked

688 views • 33 slides

Advanced Operating Systems

Advanced Operating Systems. VII. Prof. Muhammad Saeed. Deadlocks. Overview. Why do deadlocks occur? Dealing with deadlocks Ignoring them: ostrich algorithm Detecting & recovering from deadlock Avoiding deadlock Preventing deadlock. When do deadlocks happen?. Suppose

502 views • 31 slides

DININING PHILOSOPHER PROBLEM

423 views • 26 slides

4.5 Distributed Mutual Exclusion

4.5 Distributed Mutual Exclusion. Presenter: Long Ma Advisor: Dr. Zhang. Agenda. Mutual Exclusion What is Mutual Exclusion How to enforce Mutual Exclusion Algorithm in Distributed Mutual Exclusion Future Researches Conclusion

587 views • 25 slides

CSE 451: Operating Systems

CSE 451: Operating Systems. Section 7: Project 2b; Virtual Memory. Project 2a grading. Grades will be sent out later tonight. Debugging threaded programs. What techniques have you used? printf statements: macros are helpful #define print_debug(f, a...) do {

331 views • 22 slides

Deadlock

Deadlock. Permanent blocking of a set of process that compete for system resources or communicate with each other. Conditions that characterizes deadlock Mutual exclusion Hold and wait No pre-emption Circular wait. P 5. R 1. R 3. R 4. P 1. P 2. P 3. P 4. R 2. R 5.

558 views • 21 slides

Deadlocks

Deadlocks. pp. 309. System Model. A process may utilize a resource in only the following sequence:. Request Use Release. Necessary Conditions. ???????????????? ????? necessary condition ??? ???????? ?????????? ????????. Mutual exclusion (non-sharable)

403 views • 19 slides

Transaction Cycle and Key Documents

192 views • 15 slides

Scotland and the Impact of the Great War

Scotland and the Impact of the Great War. From the source. Points from the source which show the candidate has interpreted the significant views: The war caused tremendous excitement across the country which resulted in magnificent displays of patriotism.

213 views • 11 slides

The Awakening Kate Chopin

233 views • 8 slides

Simple Deadlock

Simple Deadlock. Thread A: Thread B: lock_acquire(l1); lock_acquire(l2); lock_acquire(l2); lock_acquire(l1); ... ... lock_release(l2); lock_release(l1); lock_release(l1); lock_release(l2 );. Circular Requests. P2. P4. R4. "Owned by". R2. R3. R4. R2. R3. Resource. P3. P1. P1.

91 views • 3 slides

Simple Deadlock

Simple Deadlock. Thread A: Thread B: lock_acquire (l1); lock_acquire (l2); lock_acquire (l2); lock_acquire (l1); ... ... lock_release (l2); lock_release (l1); lock_release (l1); lock_release (l2 );. Circular Requests. T2. T4. R4. "Owned by". R2. R3. R4. R2. R3. Resource. T3.

115 views • 3 slides