PPT
... – Creates L4 threads for its user processes – Maps parts of its address space to user process threads (using L4 primitives) – Acts as pager thread for its user threads – Has its own logical page table – Multiplexes its own single thread (to avoid having to change Linux source code) ...
... – Creates L4 threads for its user processes – Maps parts of its address space to user process threads (using L4 primitives) – Acts as pager thread for its user threads – Has its own logical page table – Multiplexes its own single thread (to avoid having to change Linux source code) ...
PDF
... – Creates L4 threads for its user processes – Maps parts of its address space to user process threads (using L4 primitives) – Acts as pager thread for its user threads – Has its own logical page table – Multiplexes its own single thread (to avoid having to change Linux source code) ...
... – Creates L4 threads for its user processes – Maps parts of its address space to user process threads (using L4 primitives) – Acts as pager thread for its user threads – Has its own logical page table – Multiplexes its own single thread (to avoid having to change Linux source code) ...
lecture8
... critical section is running in one thread that no other thread be able to access that data structure. Synchronization is necessary to ensure that only one thread can execute in a critical section at a time. This synchronization is accomplished through the use of some type of Windows synchronization ...
... critical section is running in one thread that no other thread be able to access that data structure. Synchronization is necessary to ensure that only one thread can execute in a critical section at a time. This synchronization is accomplished through the use of some type of Windows synchronization ...
Preface
... prevalent in virtually every arena of day-to-day life —from embedded devices in automobiles through the most sophisticated planning tools for governments and multinational firms. Yet the fundamental concepts remain fairly clear, and it is on these that we base this book. We wrote this book as a text ...
... prevalent in virtually every arena of day-to-day life —from embedded devices in automobiles through the most sophisticated planning tools for governments and multinational firms. Yet the fundamental concepts remain fairly clear, and it is on these that we base this book. We wrote this book as a text ...
1: Operating Systems Overview
... Concurrent threads might interfere with others. This leads to protection of resources by user/supervisor mode. These resources include: I/O Define I/O instructions as privileged; they can be executed only in Supervisor mode. System calls get us from user to supervisor mode. ...
... Concurrent threads might interfere with others. This leads to protection of resources by user/supervisor mode. These resources include: I/O Define I/O instructions as privileged; they can be executed only in Supervisor mode. System calls get us from user to supervisor mode. ...
OPERATING SYSTEMS:
... • If it is, information used directly from the cache (fast) • If not, data copied to cache and used there •Cache smaller than storage being cached • Cache management important design problem • Cache size and replacement policy ...
... • If it is, information used directly from the cache (fast) • If not, data copied to cache and used there •Cache smaller than storage being cached • Cache management important design problem • Cache size and replacement policy ...
Minor Thesis presentation
... • The concept of operating system for FPGA platform was first proposed by (Wigley & Kearney 2001). They introduced ReConfigMe operating system for FPGA boards. It allows execution of multiple applications simultaneously. Then an embedded Linux for FPGA was introduced by (William & Bergmann 2004). ...
... • The concept of operating system for FPGA platform was first proposed by (Wigley & Kearney 2001). They introduced ReConfigMe operating system for FPGA boards. It allows execution of multiple applications simultaneously. Then an embedded Linux for FPGA was introduced by (William & Bergmann 2004). ...
Chapter 1
... Timesharing (multitasking) is logical extension of multiprogramming in which CPU switches jobs so frequently that users can interact with each job while it is running, creating interactive computing (e.g., a lawyer doesn’t work on one case at a time) ...
... Timesharing (multitasking) is logical extension of multiprogramming in which CPU switches jobs so frequently that users can interact with each job while it is running, creating interactive computing (e.g., a lawyer doesn’t work on one case at a time) ...
Commercial Real-Time Operating Systems – An
... Microkernel design – kernel provides essential threads and real-time services use of a microkernel allows users (developers) to turn off any functionality they do not require without having to change the OS itself. The system is quite small, fitting in a minimal fashion on a single floppy, and is co ...
... Microkernel design – kernel provides essential threads and real-time services use of a microkernel allows users (developers) to turn off any functionality they do not require without having to change the OS itself. The system is quite small, fitting in a minimal fashion on a single floppy, and is co ...
第二章
... Operating system indexes into I/O device table to determine device status and to modify table entry to include interrupt.操作系统引用设备状态表以确定设备 ...
... Operating system indexes into I/O device table to determine device status and to modify table entry to include interrupt.操作系统引用设备状态表以确定设备 ...
Processes
... understand the file system implemented by the “big” O/S kernel • File systems are complex data structures and different kernels implement them in different ways • The small version of the O/S is stored in a small, special-purpose file system that the BIOS does understand ...
... understand the file system implemented by the “big” O/S kernel • File systems are complex data structures and different kernels implement them in different ways • The small version of the O/S is stored in a small, special-purpose file system that the BIOS does understand ...
slides - Simon Fraser University
... One or more CPUs, device controllers connect through common bus providing access to shared memory ...
... One or more CPUs, device controllers connect through common bus providing access to shared memory ...
OPERATING SYSTEMS QUESTIONS
... 10. What is the cause of thrashing? How does the system detect thrashing? Once it detects thrashing, what can the system do to eliminate this problem? - Thrashing is caused by under allocation of the minimum number of pages required by a process, forcing it to continuously page fault. The system can ...
... 10. What is the cause of thrashing? How does the system detect thrashing? Once it detects thrashing, what can the system do to eliminate this problem? - Thrashing is caused by under allocation of the minimum number of pages required by a process, forcing it to continuously page fault. The system can ...
Discovering Computers Fundamentals 3rd Edition
... With a command-line interface, a user types commands or presses special keys on the keyboard to enter data and instructions ...
... With a command-line interface, a user types commands or presses special keys on the keyboard to enter data and instructions ...
Chapter 1: Introduction What is an Operating System?
... in memory and on disk (the CPU is allocated to a job only if the job is in memory). A job swapped in and out of memory to the disk. On-line communication between the user and the system is provided; when the operating system finishes the execution of one command, it seeks the next “control state ...
... in memory and on disk (the CPU is allocated to a job only if the job is in memory). A job swapped in and out of memory to the disk. On-line communication between the user and the system is provided; when the operating system finishes the execution of one command, it seeks the next “control state ...
Chapter I Introduction
... • Delayed writes work quite well – Most systems use it • It has a major drawback – We will lose data if the system or the program crashes • After the program issued a write but • Before the data were saved to disk ...
... • Delayed writes work quite well – Most systems use it • It has a major drawback – We will lose data if the system or the program crashes • After the program issued a write but • Before the data were saved to disk ...
LINUX Virtualization
... AMD is producing hardware-assisted virtualization technology, under the name Pacifica which Pacifica maintains a control block for guest operating systems that are saved on execution of special instructions. This allows a virtual machine (and its associated guest operating system) to run until the V ...
... AMD is producing hardware-assisted virtualization technology, under the name Pacifica which Pacifica maintains a control block for guest operating systems that are saved on execution of special instructions. This allows a virtual machine (and its associated guest operating system) to run until the V ...
PPT
... loaders, linkage editors, and overlay-loaders, debugging systems for higher-level and machine language Communications - Provide the mechanism for creating virtual connections among processes, users, and computer systems Allow users to send messages to one another’s screens, browse web pages, sen ...
... loaders, linkage editors, and overlay-loaders, debugging systems for higher-level and machine language Communications - Provide the mechanism for creating virtual connections among processes, users, and computer systems Allow users to send messages to one another’s screens, browse web pages, sen ...
Lecture-2
... conclusion. It treats hardware and the operating system kernel as though they were all hardware A virtual machine provides an interface identical to the underlying bare hardware The operating system creates the illusion of multiple processes, each executing on its own processor with its own (vir ...
... conclusion. It treats hardware and the operating system kernel as though they were all hardware A virtual machine provides an interface identical to the underlying bare hardware The operating system creates the illusion of multiple processes, each executing on its own processor with its own (vir ...
Abstract View of System Components
... 2. Operating system – controls and coordinates the use of the hardware among the various application programs for the various users 3. Applications programs – define the ways in which the system resources are used to solve the computing problems of the users ...
... 2. Operating system – controls and coordinates the use of the hardware among the various application programs for the various users 3. Applications programs – define the ways in which the system resources are used to solve the computing problems of the users ...
Operating System Overview
... • Some instructions are not available any more • Programs can be modified and substituted by user ...
... • Some instructions are not available any more • Programs can be modified and substituted by user ...
System Calls
... • Each interrupt has a number associated that is an index into the interrupt vector table • Table also has address of the code to handle that specific interrupt ...
... • Each interrupt has a number associated that is an index into the interrupt vector table • Table also has address of the code to handle that specific interrupt ...
Chapter 1: Introduction What is an Operating System? Computer
... ) initial control in monitor ) control transfers to job ) when job completes control transfers back to monitor Operating System Concepts ...
... ) initial control in monitor ) control transfers to job ) when job completes control transfers back to monitor Operating System Concepts ...