'Context switch' diaporamas de présentation

Chapter 6, Process Synchronization

Chapter 6, Process Synchronization. 6.1 Background. Cooperating processes can affect each other This may result from message passing It may result from shared memory space The general case involves concurrent access to shared resources.

3.59k views • 349 slides

Chapter 5, CPU Scheduling

Chapter 5, CPU Scheduling. 5.1 Basic Concepts. The goal of multi-programming is to maximize the utilization of the CPU as a system resource by having a process running on it at all times

1.53k views • 140 slides

Real Time Operating Systems

Real Time Operating Systems. Fateha Khanam Bappee ID: 201104674 Dept. of Mathematics, Statistics & Computer Science St. Francis Xavier University Antigonish , NS June 11, 2012. Presentation Outline. Introduction Time Services and Scheduling Mechanisms

1.1k views • 74 slides

Outline

Outline. Computer Organization Computer architecture Central processing unit Instruction execution Devices Interrupts. Please pick up Homework #1 from the front desk if you have not got a copy. Review: System Overview. Pattern. Jacquard Loom. Variable Program. Stored Program Device.

794 views • 52 slides

Operating Systems CMPSC 473

Operating Systems CMPSC 473. Processes August 31, 2010 - Lecture 3 Instructor: Bhuvan Urgaonkar. Teaching Assistant. Name : Ohyoung Jang Office Hour : 2:30pm ~ 4:30pm, Mon Wed Location : 338E IST E-mail : oyj5007@cse.psu.edu. 2 /22. Contents. Sample Program Compiling in Unix

674 views • 47 slides

Unified Communications APIs

645 views • 43 slides

Chapter 9 - Scheduling

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Process Scheduling

Process Scheduling. Fred Kuhns. Policy versus Mechanism. Policies set rules for determining when to switch and which process/thread to run Implementation consists of the data structures and algorithms used to implement policy

549 views • 37 slides

Context-addressed communication dispatch

Context-addressed communication dispatch. Licentiate defense presentation Alisa Devlic 2 9 May 200 9. Introduction. Communication An essential part of life Increasing globalization and user mobility ? device-mediated communication:

471 views • 37 slides

Software Security: A call to action

Software Security: A call to action. From Jeanette Wing IEEE Security and Privacy 2003. Attacks. Today: code-level attacks, like buffer overflows. Tomorrow? Attacks are increasingly more sophisticated. If the defense gets better, the attackers get better.

453 views • 35 slides

Operating Systems

650 views • 30 slides

Address Translation

Address Translation. Tore Larsen Material developed by: Kai Li , Princeton University. Topics. Virtual memory Virtualization Protection Address translation Base and bound Segmentation Paging Translation look-ahead buffer (TLB). Issues. Many processes running concurrently

515 views • 30 slides

Concurrency: Threads, Address Spaces, and Processes

Concurrency: Threads, Address Spaces, and Processes. Andy Wang Operating Systems COP 4610 / CGS 5765. Why Concurrency ?. Allows multiple applications to run at the same time Analogy: juggling. Benefits of Concurrency. Benefits of Concurrency.

535 views • 29 slides

Midterm Review

Midterm Review. CS460. Delay. Speed of light 3.0 x 10 8 meters/second in a vacuum 2.3 x 10 8 meters/second in a cable 2.0 x 10 8 meters/second in a fiber. Delay x Bandwidth Product. Delay. Bandwidth. Sequence Number.

393 views • 27 slides

Unix Process Control

Unix Process Control. B.Ramamurthy. Process images in virtual memory. Creation of a process. Assign a unique pid to the new process. Allocate space for all the elements of the process image. How much? The process control block is initialized. Inherit info from parent.

383 views • 22 slides

Windows CE Memory Management

Windows CE Memory Management. Virtual Memory Simplicity Efficient use of physical memory Code and Data share-ability Protection But CE shares the address space between processes (not really switching them). Use of 32-bit Addressing. FFFF FFFF. Process Slots. Reserved for OS (on ROM?).

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PROCESS Control BLOCK & PROCESS SCHEDULING

1.69k views • 19 slides

CMSC421: Principles of Operating Systems

CMSC421: Principles of Operating Systems. Nilanjan Banerjee. Assistant Professor, University of Maryland Baltimore County nilanb@umbc.edu http://www.csee.umbc.edu/~nilanb/teaching/421/. Principles of Operating Systems

298 views • 18 slides

Protocol Implementation

Protocol Implementation. An Engineering Approach to Computer Networking. Protocol implementation. Depends on structure and environment Structure partitioning of functionality between user and kernel separation of layer processing ( interface ) Environment data copy cost

256 views • 14 slides

Round Robin (RR)

Round Robin (RR). Each process gets a small unit of CPU time ( time quantum ), usually 10-100 milliseconds. After this time has elapsed, the process is preempted and added to the end of the ready queue.

422 views • 13 slides