'Average waiting time' diaporamas de présentation

Chapter 5: Process Scheduling

Chapter 5: Process Scheduling. Chapter 5: Process Scheduling. Basic Concepts Scheduling Criteria Scheduling Algorithms (6) Multiple-Processor Scheduling Thread Scheduling OS Examples Algorithm Evaluation. Basic Concepts.

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HBDHB meetings, Tuesday 22 February and Wednesday 23 February, 2011.

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Chapter 5: Process Scheduling

Chapter 5: Process Scheduling. Chapter 5: CPU Scheduling. Basic Concepts Scheduling Criteria Scheduling Algorithms. Objectives. To introduce CPU scheduling, which is the basis for multiprogrammed operating systems To describe various CPU-scheduling algorithms. Basic Concepts.

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Tutorial 5

Tutorial 5. Test1 Review. Q1: Which of the following is an operating system theme or model as defined in lectures?. Q1: Which of the following is an operating system theme or model as defined in lectures?. The donkey model The processor model The onion model The distribution model.

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CHAPTER 6 CPU SCHEDULING

CHAPTER 6 CPU SCHEDULING. CGS 3763 - Operating System Concepts UCF, Spring 2004. OVERVIEW. CPU/IO Burst Cycle Scheduling Criteria Scheduling Algorithms First Come, First Serve (FCFS) Priority Scheduling Shortest Job First Round Robin Multi-Level Queuing Scheduling for Multi-Processors

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Queuing Systems: basic elements

Processing order. Arrivals. Waiting line. Service. Exit. System. Queuing Systems: basic elements. Queuing Systems: multiple phases. Multiple channel. Multiple phase. Modeling with Queuing Theory. System Characteristics Population source: finite, infinite No. of servers

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Queuing Systems: basic elements

Processing order. Arrivals. Waiting line. Service. Exit. System. Queuing Systems: basic elements. Queuing Systems: multiple phases. Multiple channel. Multiple phase. Modeling with Queuing Theory. System Characteristics Population source: finite, infinite No. of servers

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Chapter 5 Processor Scheduling

Chapter 5 Processor Scheduling. 5.1 Introduction. Processor (CPU) scheduling is the sharing of the processor(s) among the processes in the ready queue The critical activities are: the ordering of the allocation and de-allocation of the CPU to the various processes and threads, one at a time

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Incoming Call Analysis for the Legal Advice & Referral Center (LARC)

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Lecture Topics: 11/15

Lecture Topics: 11/15. CPU scheduling: Scheduling goals and algorithms. Review: Process State. A process can be in one of several states (new, ready, running, waiting, terminated). The OS keeps track of process state by maintaining a queue of PCBs for each state.

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Chapter 7 TN Waiting Line Management

Chapter 7 TN Waiting Line Management. Waiting line characteristics Some waiting line management tips Examples (Models 1, 2, 3, and 4). 2. Suggestions for Managing Queues. Do not overlook the effects of perceptions management. Determine the acceptable waiting time for your customers.

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Simulation

Simulation. A Queuing Simulation. Example. The arrival pattern to a bank is not Poisson There are three clerks with different service rates A customer must choose which idle server to go to These conditions do not meet the restrictions of queuing models developed earlier.

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Simulation by Hand: Setup

Simulation by Hand: Setup. Simulation by Hand: t = 0.00, Initialize. Simulation by Hand: t = 0.00, Arrival of Part 1. 1. Simulation by Hand: t = 1.73, Arrival of Part 2. 2. 1. Simulation by Hand: t = 2.90, Departure of Part 1. 2. Simulation by Hand: t = 3.08, Arrival of Part 3. 3.

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Topic 5: Simple Queueing Theory

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Queue Length

Queue Length. Before anything else. Read the manual carefully. It is your homework What is covered in the following slides is just general. General. Customer service analysis (restaurants) Toll booth Parking garage Intersections Poisson distribution. Data Collection.

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CPU Scheduler

CPU Scheduler. In multiprogramming, more than one process may be in memory ready to execute QUESTION: In what order these processes will be executed?. Criteria Fair All processes should be able to access all resources in a fair manner Discriminatory

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CPU Scheduling

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CSC 205 Programming II

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4-5 December 2006 Hobart

Orthopaedic Physiotherapy Screening Clinic in a Specialist Spinal Service Presenter: Brett Baxter Hospital: Eagle. 4-5 December 2006 Hobart. Spinal Orthopaedic Outpatient Waiting list. Waiting list for this service is long As of March 06 there were 806 patients on the waiting list

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