PPT-Chapter 7, Deadlocks 1 7.1 System Model

In order to talk about deadlocks in a system its helpful to have a model of the system A system consists of a set of resources The resources can be grouped into types Processes compete to have unique access to instances of the types. 1 List three examples of deadlocks that are not related to a computer system environment Answer Two cars crossing a singlelane bridge from opposite directions A person going down a ladder while another person is climbing up the ladder Two trains In our simple model the memory system is a linear array of bytes and the CP U can access each memory location in a constant amount of time While this is an effective model as f ar as it goes it does not re64258ect the way that modern systems really 1 List three examples of deadlocks that are not related to a computer system environment Answer Two cars crossing a singlelane bridge from opposite directions A person going down a ladder while another person is climbing up the ladder Two trains tr 1 List three examples of deadlocks that are not related to a computer system environment Answer Two cars crossing a singlelane bridge from opposite directions A person going down a ladder while another person is climbing up the ladder Two trains Chapter 7: Deadlocks. The Deadlock Problem. System Model. Deadlock Characterization. Methods for Handling Deadlocks. Deadlock Prevention. Deadlock Avoidance. Deadlock Detection . Recovery from Deadlock . Lecture 1. 1. Chapter 6 Architectural design. Topics covered. Architectural design decisions. Architectural views. Architectural patterns. Application architectures. 2. Chapter 6 Architectural design. Spring 2013. Deadlocks. Dan Tsafrir (13/5/2013). Partially based on slides by Hagit Attiya. OS (234123) - spring 2013 - deadlocks. 1. Text @ OS notes book. Much of the material appears in Section 3.2 in Feitelson’s OS notes book. 1. 7.1 System Model. In order to talk about deadlocks in a system, it’s helpful to have a model of the system. A . system consists of a set of resources. The resources can be grouped into types. Processes compete to have (unique) access to instances of the types. DEADLOCKS. Manju Muralidharan . Priya. Objective. At the end of this presentation, you will know:. What is a Deadlock?. Preventing and Avoiding Deadlocks. Detecting Deadlocks. Recovery Schemes. 2. CS 561 Deadlocks. Chapter 5 – System Modeling. Lecture 1. 1. Chapter 5 System modeling. Topics covered. Context models. Interaction models. Structural models. Behavioral models. Model-driven engineering . 2. Chapter 5 System modeling. 1. 7.1 System Model. A system consists of a set of resources. The resources can be grouped into types. Processes compete to have (unique) access to instances of the types. 2. Examples of resource types:. Lecture 1. 1. Chapter 6 Architectural design. Topics covered. Architectural design decisions. Architectural views. Architectural patterns. Application architectures. 2. Chapter 6 Architectural design. OPERATING SYSTEMS . DEADLOCKS. 7: Deadlocks. 2. What Is In This Chapter?. What is a deadlock?. Staying Safe: Preventing and Avoiding Deadlocks. Living Dangerously: Let the deadlock happen, then detect it and recover from it.. Chapter 7: Deadlocks Chapter 7: Deadlocks The Deadlock Problem System Model Deadlock Characterization Methods for Handling Deadlocks Deadlock Prevention Deadlock Avoidance Deadlock Detection Recovery from Deadlock