OPERATING SYSTEM CONCEPTS SILBERSCHATZ PDF

Chapter 19: RealChapter 19: Real--Time SystemsTime Systems19.2Silberschatz, Galvin and Gagne ©2005Operating System Concepts – 7thEdition, Jan 1, 2005Chapter 19: RealChapter 19: Real--Time SystemsTime Systems System Characteristics Features of Real-Time Systems Implemen[r]

I/O HardwareI/O Hardware Incredible variety of I/O devices Common conceptsz Portz Bus (daisy chain or shared direct access)z Controller (host adapter) I/O instructions control devices Devices have addresses, used by z Direct I/O instructionsz Memory-mapped I/O13.5Silberschatz, Galvin and Gagne ©[r]

Operating System Concepts – 7th Edition, Apr 11, 2005Principles of ProtectionPrinciples of Protection■Guiding principle – principle of least privilege●Programs, users and systems should be given just enough privileges to perform their tasks14.6Silberschatz, Galvin and Gagne ©200[r]

HydraFixed set of access rights known to and interpreted by the system.Interpretation of user-defined rights performed solely by user's program; system provides access protection for use of these rights.Cambridge CAP System Data capability - provides standard read, write, ex[r]

Chapter 13: I/O SystemsChapter 13: I/O Systems13.2Silberschatz, Galvin and Gagne ©2005Operating System Concepts – 7th Edition, Jan 2, 2005Chapter 13: I/O SystemsChapter 13: I/O SystemsI/O HardwareApplication I/O InterfaceKernel I/O SubsystemTransforming I/O Requests to Hardw[r]

1INTRODUCTION1.1 WHAT IS AN OPERATING SYSTEM?1.2 HISTORY OF OPERATING SYSTEMS1.3 THE OPERATING SYSTEM ZOO1.4 COMPUTER HARDWARE REVIEW1.5 OPERATING SYSTEM CONCEPTS1.6 SYSTEM CALLS1.7 OPERATING SYSTEM STRUCTURE1.8 RESEARCH ON[r]

 Consider the ReadFile() function in the Win32 API—a function for reading from a file A description of the parameters passed to ReadFile()z HANDLE file—the file to be readz LPVOID buffer—a buffer where the data will be read into and written fromz DWORD bytesToRead—the number of bytes to be read i[r]

Disk StructureDisk Structure■Disk drives are addressed as large 1-dimensional arrays of logical blocks, where the logical block is the smallest unit of transfer. ■The 1-dimensional array of logical blocks is mapped into the sectors of the disk sequentially.●Sector 0 is the first sector of the first[r]

Operating System ConceptsDispatcher■Dispatcher module gives control of the CPU to the process selected by the short-term scheduler; this involves:✦switching context✦switching to user mode✦jumping to the proper location in the user program to restart that program■Dispatch latency – time[r]

Issues such as parent/child relationships or process hierarchies are left to the particular environmental subsystem that owns the process.Silberschatz, Galvin and Gagne 200221.22Operating System ConceptsExecutive — Local Procedure Call Facility■The LPC passes requests and resul[r]

Disk StructureDisk Structure■Disk drives are addressed as large 1-dimensional arrays of logical blocks, where the logical block is the smallest unit of transfer. ■The 1-dimensional array of logical blocks is mapped into the sectors of the disk sequentially.●Sector 0 is the first sector of the first[r]

NtCreateProcessEx is the internal system service the Windows CreateProcess function calls to Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. 14create a new process. (For a definition of native functions, see the section “System Service Dispatc[r]

common bus providing access to shared memoryz Concurrent execution of CPUs and devices competing for memory cycles1.11Silberschatz, Galvin and Gagne ©2005Operating System Concepts – 7thEdition, Jan 12, 2005ComputerComputer--System OperationSystem Operation I/O devices an[r]

 Scheduling under 1 and 4 is nonpreemptive All other scheduling is preemptive5.7Silberschatz, Galvin and Gagne ©2005Operating System Concepts – 7thEdition, Feb 2, 2005DispatcherDispatcher Dispatcher module gives control of the CPU to the process selected by the short-term sch[r]

access. User programs could neither ensure adherence to protection methods nor betrusted to allocate only free blocks and deallocate blocks on file deletion.Communications. Message passing between systems requires messages be turnedinto packets of information, sent to the network controller, transmit[r]

user modez Modular structure allows additional environmental subsystems to be added without affecting the executive Portability — 2000 can be moved from on hardware architecture to another with relatively few changesz Written in C and C++z Processor-dependent code is isolated in a dynamic link libr[r]

generating messages from ciphertexts.  Both D and D(k) for any k should be efficiently computable functions. An encryption algorithm must provide this essential property: Given a ciphertext c ∈C, a computer can compute m such that E(k)(m) = c only if it possesses D(k). z Thus, a computer holding D[r]

Operating System ConceptsNỘI DUNG CHÍNH:I.Khái niệmII. Các điều kiện hình thành DeadlockIII. Xử lý DeadlockIII.1. Ngăn chặn và tránh DeadlockIII.2. Phát hiện và phục hồi DeadlockIII.3. Bỏ qua DeadlockHình ảnh tắc nghẽn trong đời sống thường ngàyI.KHÁI NIỆM:Deadlock bắt nguồn từ sự xun[r]

another resource that cannot be immediately allocated to it, then all resources currently being held are released.z Preempted resources are added to the list of resources for which the process is waiting.z Process will be restarted only when it can regain its old resources, as well as the new ones t[r]

Edition, Feb 6, 2005Process ManagementProcess Management UNIX process management separates the creation of processes and the running of a new program into two distinct operations.z The fork system call creates a new processz A new program is run after a call to execve Under UNIX, a process[r]