operating system internals and design principles pdf

... operating system running on the hardware platform • Platforms and the operating systems of client and server may differ • These lower-level differences are irrelevant as long as a client and ... resources are always available Trang 45Operating System Design Trang 46Operating System Design Trang 47Cluster Computer Architecture• Cluster middleware services and functions – Single entry point ... of the disks Trang 42Clustering Methods: Benefits and Limitations Trang 43Clustering Methods: Benefits and Limitations Trang 44Operating System Design Issues • Failure management – Highly available

Ngày tải lên: 16/05/2017, 13:42

... Processors, I/O channels, main and secondary memory, devices, and data structures such as files, databases, and semaphores • Deadlock occurs if each process holds one resource and requests the other ... Trang 1Chapter 6 Concurrency: Deadlock and ©2008, Prentice Hall Trang 3DeadlockTrang 6Reusable Resources• Used by only one process at a time and not depleted by that use • Processes obtain ... Request 80 Kbytes; Trang 10Consumable Resources• Created (produced) and destroyed (consumed) • Interrupts, signals, messages, and information in I/O buffers • Deadlock may occur if a Receive message

Ngày tải lên: 16/05/2017, 13:52

... Operating Systems: Internals and Design Principles, 6/E William Stallings Chapter Memory Management Patricia Roy Manatee ... Segmentation The need for memory management • Memory is cheap today, and getting cheaper – But applications are demanding more and more memory, there is never enough! • Memory Management, involves ... address is not within bounds, an interrupt is generated to the operating system Paging • Partition memory into small equal fixed-size chunks and divide each process into the same size chunks • • The

Ngày tải lên: 16/05/2017, 13:52

... Trang 1Chapter 9 Uniprocessor SchedulingOperating Systems: Internals and Design Principles, 6/E William Stallings Dave Bremer Otago Polytechnic, N.Z. ©2008, ... interrupts – I/O interrupts – Operating system calls – Signals Trang 15Aim of Short Term Scheduling• Main objective is to allocate processor time to optimize certain aspects of system behaviour • A set ... Criteria: User vs System• We can differentiate between user and Trang 17Short-Term Scheduling Criteria: Performance• We could differentiate between performance related criteria, and those unrelated

Ngày tải lên: 16/05/2017, 13:52

... Trang 1Chapter 11 I/O Management and Disk Scheduling Dave Bremer Otago Polytechnic, NZ ©2008, Prentice Hall Operating Systems: Internals and Design Principles, 6/E William Stallings Trang ... – Operating System Design Issues – I/O Buffering Trang 3Categories of I/O Devices• Difficult area of OS design – Difficult to develop a consistent solution due to a wide variety of devices and ... of the I/O Function – Operating System Design Issues – I/O Buffering Trang 58• Redundant Array of Independent Disks • Set of physical disk drives viewed by the operating system as a single logical

Ngày tải lên: 16/05/2017, 13:53

... Prentice Hall Operating Systems: Internals and Design Principles, 6/E William Stallings Trang 2• Secondary Storage Management• File System Security • Unix File Management • Linux Virtual File System ... Storage Management• File System Security • Unix File Management • Linux Virtual File System • Windows File System Trang 59Secondary Storage Management • The Operating System is responsible for ... Virtual File System • Windows File System Trang 95Linux Virtual File System• Uniform file system interface to user Trang 96Key ingredients of VFS Strategy • A user process issues a file system call

Ngày tải lên: 16/05/2017, 13:53

... Embedded SystemsDave Bremer Otago Polytechnic, N.Z. ©2008, Prentice Hall Operating Systems: Internals and Design Principles, 6/E William Stallings Trang 3Embedded System• One of the most important and ... categories of operating systems • Hardware and software designed to perform a dedicated function • Tightly coupled to their environment • Often, embedded systems are part of a larger system or product, ... and Condition Variables Trang 32Mutexes and Condition Variables Trang 34• 400 bytes of code • Not a real-time OS – No kernel – There are no processes; – OS doesn’t have a memory allocation system

Ngày tải lên: 16/05/2017, 13:53

... Operating Systems: Internals and Design Principles, 6/E William Stallings Chapter 14 Computer Security Threats Roadmap • • • • • • Computer Security Concepts Threats, Attacks, and Assets ... other systems • Remote execution capability – A worm executes a copy of itself on another system • Remote log-in capability – A worm logs on to a remote system as a user and then uses commands ... Attacks, and Assets Intruders Malicious Software Overview Viruses, Worms, and Bots Rootkits Rootkit • Set of programs installed on a system to maintain administrator (or root) access to that system

Ngày tải lên: 16/05/2017, 13:53

... Operating Systems: Internals and Design Principles, 6/E William Stallings Chapter Computer System Overview Patricia Roy Manatee Community College, Venice, FL ©2008, Prentice Hall Operating System ... store program and data files Cache Memory • • Processor speed faster than memory access speed Exploit the principle of locality with a small fast memory Cache and Main Memory Cache Principles • ... Secondary Memory Devices – Communications equipment – Terminals • System bus – Communication among processors, main memory, and I/O modules Computer Components: Top-Level View Processor Registers

Ngày tải lên: 16/05/2017, 14:03

... 53Modern Operating SystemsTrang 54Modern Operating SystemsTrang 55Modern Operating Systems• Symmetric multiprocessing (SMP) – There are multiple processors – These processors share same main memory and ... 56Multiprogramming and Multiprocessing Trang 57Modern Operating Systems• Distributed operating systems – Provides the illusion of a single main memory space and single secondary memory space Trang 58Modern Operating ... 11• Portion of operating system that is in main memory • Contains most frequently used functions • Also called the nucleus Trang 15Evolution of Operating Systems • Simple batch system – Monitor

Ngày tải lên: 16/05/2017, 14:03

... Description and ControlOperating Systems: Internals and Design Principles, 6/E William Stallings Dave Bremer Otago Polytechnic, N.Z. ©2008, Prentice Hall Trang 2– How are processes represented and ... to user programs – Operating system code is executed as a separate entity that operates in privileged mode Trang 54Process-based Operating System• Process-based operating system – Implement the ... 29Processes and Resources Trang 30Operating System Control Structures• For the OS is to manage processes and resources, it must have information about the current status of each process and resource

Ngày tải lên: 16/05/2017, 14:03

... Threads, SMP, and Microkernels Dave Bremer Otago Polytechnic, N.Z. ©2008, Prentice Hall Operating Systems: Internals and Design Principles, 6/E William Stallings Trang 3Processes and Threads• ... the sending and receiving process and – A body that contains direct data, a pointer to a block of data, or some control information about the process. Trang 43Microkernal Design:I/O and interrupt ... other processes • These two characteristics are treated independently by the operating system Trang 4Processes and Threads• The unit of dispatching is referred to as a thread or lightweight

Ngày tải lên: 16/05/2017, 14:04

... Operating Systems: Internals and Design Principles, 6/E William Stallings Chapter Concurrency: Mutual Exclusion and Synchronization Dave Bremer Otago Polytechnic, ... applications – Extension of modular design • Operating system structure – OS themselves implemented as a set of processes or threads Key Terms Interleaving and Overlapping Processes • Earlier ... Monitors Message Passing Readers/Writers Problem Multiple Processes • Central to the design of modern Operating Systems is managing multiple processes – Multiprogramming – Multiprocessing – Distributed

Ngày tải lên: 16/05/2017, 14:04

... 1Computer System Overview Chapter 1 Trang 2Operating System• Exploits the hardware resources of one or more processors • Provides a set of services to system users • Manages secondary memory and I/O ... references by optimizing register use • Control and status registers – Used by processor to control operating of the processor – Used by privileged operating-system routines to control the execution ... programs and system programs • Types of registers – Data – Address • Index • Segment pointer • Stack pointer Trang 8• When memory is divided into segments, memory is referenced by a segment and an

Ngày tải lên: 09/01/2018, 12:01

... Computer System Trang 5• Access to I/O devices• Controlled access to files • System access Trang 6Services Provided by the Operating System • Error detection and response – Internal and external ... to the operating system for the user Trang 49and I/O facilities– All processors can perform the same functions Trang 5050Multiprogramming and Multiprocessing Trang 51Modern Operating Systems ... Distributed operating systems – Provides the illusion of a single main memory space and single secondary memory space Trang 52– Enables programmers to customize an operating system without disrupting system

Ngày tải lên: 09/01/2018, 12:01

... 28Processes and Resources Trang 29Operating System Control Structures • Information about the current status of each process and resource • Tables are constructed for each entity the operating system ... Trang 5353Trang 5454Trang 55Execution of the Operating System • Process-Based Operating System – Implement operating system as a collection of system processes – Useful in processor or multi-computer ... Processes– Operating system software within context of a user process – Process executes in privileged mode when executing operating system code Trang 5353Trang 5454Trang 55Execution of the Operating

Ngày tải lên: 09/01/2018, 12:01

... by the operating system Process • Dispatching is referred to as a thread or lightweight process • Resource of ownership is referred to as a process or task Multithreading • Operating system supports ... Microkernel Design • Interprocess communication • I/O and interrupt management 38 Windows Processes • Implemented as objects • An executable process may contain one or more threads • Both processes and ... within the same process share memory and files, they can communicate with each other without invoking the kernel Uses of Threads in a SingleUser Multiprocessing System • • • • Foreground to background

Ngày tải lên: 09/01/2018, 12:01

... Wait M01_STAL6329_06_SE_C01.QXD 2/13/08 1:48 PM Page 19 54 CHAPTER 2 / OPERATING SYSTEM OVERVIEW Ease of Evolution of an Operating System A major operating system will evolve over time for a number of reasons: ã ... EVOLUTION OF OPERATING SYSTEMS In attempting to understand the key requirements for an OS and the significance of the major features of a contemporary OS, it is useful to consider how operating ... versions of UNIX and the Macintosh operating system did not employ a paging mech- anism because they were run on processors without paging hardware. 1 Subse- quent versions of these operating systems...

Ngày tải lên: 19/03/2014, 13:41

... three-phase system are only half those of the three separate single-phase systems, and the line-voltage drop between the source and load in the three-phase system is half that of each single-phase system. ... three-phase systems over sepa- rate single-phase systems is reduced capital and operating costs of transmis- sion and distribution, as well as better voltage regulation. Some three-phase systems ... functions for both the distributed energy system and the local electric power system that allow paral- leling and disconnection from the electric power system. These power electronic interfaces...

Ngày tải lên: 30/03/2014, 07:20

... done. 2.2.3. Design of System After the system has been analyzed by the analyst, the design stage of system life cycle begins. In design phase, the structure or design for the proposed system is ... and Design? System development can generally be thought of having two major components: systems analysis and systems design. In System Analysis more emphasis is given to understanding the details ... done and the need for new or improved system is established, all possible alternate solutions are chalked out. All these systems are known as "candidate systems". All the candidate systems...

Ngày tải lên: 27/10/2013, 23:15