ch2
... concurrently, resources must be allocated to each of them Many types of resources - Some (such as CPU cycles, main memory, and file storage) may have special allocation code, others (such as I/O devices) may have general request and release code. Accounting - To keep track of which users use how ...
... concurrently, resources must be allocated to each of them Many types of resources - Some (such as CPU cycles, main memory, and file storage) may have special allocation code, others (such as I/O devices) may have general request and release code. Accounting - To keep track of which users use how ...
A high-performance, POSIX compatible, multicore real-time
... Easy migration and portability Enea OSE® provides integrated POSIX support with unified file descriptors for file systems as well as for TCP/IP, proven in crash-safe journaling file systems. The file system can transparently be located on another processor (as in a Linux case via NFS). POSIX makes E ...
... Easy migration and portability Enea OSE® provides integrated POSIX support with unified file descriptors for file systems as well as for TCP/IP, proven in crash-safe journaling file systems. The file system can transparently be located on another processor (as in a Linux case via NFS). POSIX makes E ...
operating system design
... understand, it should be no surprise that the results are often far from optimal. Operating systems are not the most complex systems around. Aircraft carriers are far more complicated, for example, but they partition into isolated subsystems better. The people designing the toilets on a aircraft car ...
... understand, it should be no surprise that the results are often far from optimal. Operating systems are not the most complex systems around. Aircraft carriers are far more complicated, for example, but they partition into isolated subsystems better. The people designing the toilets on a aircraft car ...
Operating-System Structures
... logical conclusion. It treats hardware and the operating system kernel as though they were all hardware A virtual machine provides an interface identical to ...
... logical conclusion. It treats hardware and the operating system kernel as though they were all hardware A virtual machine provides an interface identical to ...
Operating Systems, 082
... All I/O instructions are privileged instructions I/O devices and CPU can execute concurrently CPU moves data between main memory and device controllers' buffers (done by device drivers) Device controllers interrupt upon completion Interrupts or Traps enable mode switching Operating syste ...
... All I/O instructions are privileged instructions I/O devices and CPU can execute concurrently CPU moves data between main memory and device controllers' buffers (done by device drivers) Device controllers interrupt upon completion Interrupts or Traps enable mode switching Operating syste ...
Document
... The main mode of access to a UNIX machine is through a terminal, which usually includes a keyboard, and a video monitor. For each terminal connected to the UNIX system, the kernel runs a process called a tty that accepts input from the terminal, and sends output to the terminal. Tty processes are ge ...
... The main mode of access to a UNIX machine is through a terminal, which usually includes a keyboard, and a video monitor. For each terminal connected to the UNIX system, the kernel runs a process called a tty that accepts input from the terminal, and sends output to the terminal. Tty processes are ge ...
Advanced Operating Systems
... 1. Breadth helps depth. The more you understand, the more you'll understand about each individual thing. Seeing how things in different areas are similar or different is a very good way of seeing what's important. 2. Breakthroughs often occur when people can cross traditional boundaries: compilers a ...
... 1. Breadth helps depth. The more you understand, the more you'll understand about each individual thing. Seeing how things in different areas are similar or different is a very good way of seeing what's important. 2. Breakthroughs often occur when people can cross traditional boundaries: compilers a ...
Introduction
... I/O devices and CPU can execute concurrently CPU moves data between main memory and device controllers' buffers (done by device drivers) Device controllers interrupt upon completion Interrupts or Traps enable mode switching Operating systems are interrupt-driven Traps/signals: software i ...
... I/O devices and CPU can execute concurrently CPU moves data between main memory and device controllers' buffers (done by device drivers) Device controllers interrupt upon completion Interrupts or Traps enable mode switching Operating systems are interrupt-driven Traps/signals: software i ...
A Real-Time Linux
... great variety of demands on real-time scheduling, a real-time operating system should also include a exible and reprogrammable task scheduling discipline. These requirements are not easy to satisfy, but it has been increasingly clear over the last several years that realtime operating systems also ...
... great variety of demands on real-time scheduling, a real-time operating system should also include a exible and reprogrammable task scheduling discipline. These requirements are not easy to satisfy, but it has been increasingly clear over the last several years that realtime operating systems also ...
A Real-Time Linux
... great variety of demands on real-time scheduling, a real-time operating system should also include a exible and reprogrammable task scheduling discipline. These requirements are not easy to satisfy, but it has been increasingly clear over the last several years that realtime operating systems also ...
... great variety of demands on real-time scheduling, a real-time operating system should also include a exible and reprogrammable task scheduling discipline. These requirements are not easy to satisfy, but it has been increasingly clear over the last several years that realtime operating systems also ...
Introduction to Programming Methodology Notes
... The fifth generation programming language or visual programming language is also known as natural language. Provides a visual or graphical interface, called a visual programming environment, for creating source codes. Fifth generation programming allows people to interact with computers without need ...
... The fifth generation programming language or visual programming language is also known as natural language. Provides a visual or graphical interface, called a visual programming environment, for creating source codes. Fifth generation programming allows people to interact with computers without need ...
Windows, Linux and Mac Operating system Booting Process: a
... Operating system is the program which operates all other program in the computer system. Whenever we want to interact with the computers we must have an operating system on it. The operating system was developed for the better computer usage and providing better platform to the users application. Ac ...
... Operating system is the program which operates all other program in the computer system. Whenever we want to interact with the computers we must have an operating system on it. The operating system was developed for the better computer usage and providing better platform to the users application. Ac ...
High Performance Application-Oriented Operating Systems
... express their applications’ needs. An E POS inflated interface embraces most of the consensual definitions for a system abstraction. It is inflated because it brings together not a single view of the abstraction it exports, but a collection of its most usual representations. Examples of inflated int ...
... express their applications’ needs. An E POS inflated interface embraces most of the consensual definitions for a system abstraction. It is inflated because it brings together not a single view of the abstraction it exports, but a collection of its most usual representations. Examples of inflated int ...
Module 3: Operating
... secondary storage to back up main memory Most modern computer systems use disks as the principle on-line storage medium, for both programs and data The operating system is responsible for the following activities in connection with disk management: Free space management Storage allocation ...
... secondary storage to back up main memory Most modern computer systems use disks as the principle on-line storage medium, for both programs and data The operating system is responsible for the following activities in connection with disk management: Free space management Storage allocation ...
Construction of a Highly Dependable Operating System,
... 3. Analysis of Drivers in the Base System As the base for our work we started with an existing hybrid microkernel-based operating system, MINIX 2, which we then heavily modified. This approach allowed us to focus on mechanisms for improving dependability without having to write large amounts of code ...
... 3. Analysis of Drivers in the Base System As the base for our work we started with an existing hybrid microkernel-based operating system, MINIX 2, which we then heavily modified. This approach allowed us to focus on mechanisms for improving dependability without having to write large amounts of code ...
2.01 - Kangwon
... Once a program is assembled or compiled, it must be loaded into memory to be executed. Absolute loaders, re-locatable loaders, linkage editors, and overlay-loaders, debugging systems for higher-level and machine ...
... Once a program is assembled or compiled, it must be loaded into memory to be executed. Absolute loaders, re-locatable loaders, linkage editors, and overlay-loaders, debugging systems for higher-level and machine ...
Chapter 13 I/O Hardware
... i.e., Printing Device reservation - provides exclusive access to a ...
... i.e., Printing Device reservation - provides exclusive access to a ...
11. Kernel Design
... Wait for pre-existing RCU readers to complete (for deletion) Maintain multiple versions of recently updated objects (for readers) ...
... Wait for pre-existing RCU readers to complete (for deletion) Maintain multiple versions of recently updated objects (for readers) ...
Shared Memory IPC
... Many aspects of IPC mechanisms are duals of each other Which implies that these mechanisms have the same power First recognized in context of messages vs. procedure calls At least, IPC mechanisms can be simulated by each other Depends on model of computation And on philosophy of user In particular c ...
... Many aspects of IPC mechanisms are duals of each other Which implies that these mechanisms have the same power First recognized in context of messages vs. procedure calls At least, IPC mechanisms can be simulated by each other Depends on model of computation And on philosophy of user In particular c ...
Standard Operating and Maintenance Procedures
... Downloads – for downloaded files, such as from the Internet. Library – for support files, such as fonts used by the account. Movies – for movies that can be played on the computer. Music - for music files. Pictures – for picture files. Public – for files to share with others over a network. Sites – ...
... Downloads – for downloaded files, such as from the Internet. Library – for support files, such as fonts used by the account. Movies – for movies that can be played on the computer. Music - for music files. Pictures – for picture files. Public – for files to share with others over a network. Sites – ...
Berkeley Software Distribution
Berkeley Software Distribution (BSD) is a Unix operating system derivative developed and distributed by the Computer Systems Research Group (CSRG) of the University of California, Berkeley, from 1977 to 1995. Today the term ""BSD"" is often used non-specifically to refer to any of the BSD descendants which together form a branch of the family of Unix-like operating systems. Operating systems derived from the original BSD code remain actively developed and widely used.Historically, BSD has been considered a branch of Unix, Berkeley Unix, because it shared the initial codebase and design with the original AT&T Unix operating system. In the 1980s, BSD was widely adopted by vendors of workstation-class systems in the form of proprietary Unix variants such as DEC ULTRIX and Sun Microsystems SunOS. This can be attributed to the ease with which it could be licensed, and the familiarity the founders of many technology companies of the time had with it.Although these proprietary BSD derivatives were largely superseded by the UNIX System V Release 4 and OSF/1 systems in the 1990s (both of which incorporated BSD code and are the basis of other modern Unix systems), later BSD releases provided a basis for several open source development projects, e.g. FreeBSD, OpenBSD, NetBSD, Darwin or PC-BSD, that are ongoing. These, in turn, have been incorporated in whole or in part in modern proprietary operating systems, e.g. the TCP/IP networking code in Windows NT 3.1 and most of the foundation of Apple's OS X and iOS.