Chapter 3 Operating-System Structures 2
... • A virtual-machine system is a perfect vehicle for operating-systems research and development. System development is done on the virtual machine, instead of on a physical machine and so does not disrupt normal system operation. • The virtual machine concept is difficult to implement due to the effo ...
... • A virtual-machine system is a perfect vehicle for operating-systems research and development. System development is done on the virtual machine, instead of on a physical machine and so does not disrupt normal system operation. • The virtual machine concept is difficult to implement due to the effo ...
unix intro
... markets, is often the most reliable software, and in many cases has the best performance. OSS/FS scales, both in problem size and project size. OSS/FS software often has far better security, perhaps due to the possibility of worldwide review. Total cost of ownership for OSS/FS is often far less than ...
... markets, is often the most reliable software, and in many cases has the best performance. OSS/FS scales, both in problem size and project size. OSS/FS software often has far better security, perhaps due to the possibility of worldwide review. Total cost of ownership for OSS/FS is often far less than ...
python - WordPress.com
... evaluates to None • This is primarily code that is executed for side effect: assignments, print statements, calls to “non-fruitful” functions ...
... evaluates to None • This is primarily code that is executed for side effect: assignments, print statements, calls to “non-fruitful” functions ...
UNIX Notes:
... Ctrl-H or [BACKSPACE] Erase character to left of cursor Ctrl-Q Restart output after paused by Ctrl-S Ctrl-S Pauses output to the screen Ctrl-U Erase the whole input line so you can start over ...
... Ctrl-H or [BACKSPACE] Erase character to left of cursor Ctrl-Q Restart output after paused by Ctrl-S Ctrl-S Pauses output to the screen Ctrl-U Erase the whole input line so you can start over ...
OSPP: The Kernel Abstraction
... Save current stack pointer (SS:ESP) Save current program counter (CS:EIP) Save current processor status (EFLAGS) Switch to interrupt stack; push saved values onto that stack • Switch to kernel mode • Get handler address from interrupt vector table • Interrupt handler saves registers it might clobber ...
... Save current stack pointer (SS:ESP) Save current program counter (CS:EIP) Save current processor status (EFLAGS) Switch to interrupt stack; push saved values onto that stack • Switch to kernel mode • Get handler address from interrupt vector table • Interrupt handler saves registers it might clobber ...
PowerPoint Format
... Linux uses two techniques to protect critical sections: 1. Normal kernel code is nonpreemptible – when a time interrupt is received while a process is executing a kernel system service routine, the kernel’s need_resched flag is set so that the scheduler will run once the system call has completed an ...
... Linux uses two techniques to protect critical sections: 1. Normal kernel code is nonpreemptible – when a time interrupt is received while a process is executing a kernel system service routine, the kernel’s need_resched flag is set so that the scheduler will run once the system call has completed an ...
Virtual Machine Monitors - Computer Sciences User Pages
... setting (again, without virtualization), the flow of control would be like what you see in Table B.1. On a virtualized platform, things are a little more interesting. When an application running on an OS wishes to perform a system call, it does the exact same thing: executes a trap instruction with ...
... setting (again, without virtualization), the flow of control would be like what you see in Table B.1. On a virtualized platform, things are a little more interesting. When an application running on an OS wishes to perform a system call, it does the exact same thing: executes a trap instruction with ...
Introduction to Linux
... Linux Command-Line Interface ■ Linux shells: A shell is a command interpreter that allows you to type commands from the keyboard to interact with the operating system kernel. ■ sh (Bourne Shell) The sh shell was the earliest shell, being developed for UNIX back in the late 1970s. ■ bash (Bourne-Aga ...
... Linux Command-Line Interface ■ Linux shells: A shell is a command interpreter that allows you to type commands from the keyboard to interact with the operating system kernel. ■ sh (Bourne Shell) The sh shell was the earliest shell, being developed for UNIX back in the late 1970s. ■ bash (Bourne-Aga ...
Intro to CS162
... • UCB Academic Honor Code: "As a member of the UC Berkeley community, I act with honesty, integrity, and respect for others." ...
... • UCB Academic Honor Code: "As a member of the UC Berkeley community, I act with honesty, integrity, and respect for others." ...
Module 3: Operating
... small to accommodate all data and programs permanently, the computer system must provide 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 act ...
... small to accommodate all data and programs permanently, the computer system must provide 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 act ...
I/O Systems
... “dirty” blocks Some use object-oriented methods and message passing to implement I/O ...
... “dirty” blocks Some use object-oriented methods and message passing to implement I/O ...
2. Operating Systems
... principle on- line storage medium, for both programs and data. The operating system is responsible for the following activities in connection with disk ...
... principle on- line storage medium, for both programs and data. The operating system is responsible for the following activities in connection with disk ...
Introduction to Programming Methodology Notes
... We shall discuss these concepts in some detail in this section. Objects Objects are the basic run time entities in an object oriented system. They may represent a person, a place, a bank account, a table of data or any item that the program has to handle. They may also represent user-defined data su ...
... We shall discuss these concepts in some detail in this section. Objects Objects are the basic run time entities in an object oriented system. They may represent a person, a place, a bank account, a table of data or any item that the program has to handle. They may also represent user-defined data su ...
No Slide Title
... Linux uses two techniques to protect critical sections: 1. Normal kernel code is nonpreemptible – when a time interrupt is received while a process is executing a kernel system service routine, the kernel’s need_resched flag is set so that the scheduler will run once the system call has completed ...
... Linux uses two techniques to protect critical sections: 1. Normal kernel code is nonpreemptible – when a time interrupt is received while a process is executing a kernel system service routine, the kernel’s need_resched flag is set so that the scheduler will run once the system call has completed ...
2.01 - Kangwon
... When multiple users or multiple jobs running 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. ...
... When multiple users or multiple jobs running 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. ...
ch18
... Linux uses two techniques to protect critical sections: 1. Normal kernel code is nonpreemptible (until 2.6) – when a time interrupt is received while a process is executing a kernel system service routine, the kernel’s need_resched flag is set so that the scheduler will run once the system call has ...
... Linux uses two techniques to protect critical sections: 1. Normal kernel code is nonpreemptible (until 2.6) – when a time interrupt is received while a process is executing a kernel system service routine, the kernel’s need_resched flag is set so that the scheduler will run once the system call has ...
What are the Basic Components of computer
... c. New hardware is designed and implemented in the computer system d. All of the above ANS: C 20. A major problem with early serial processing systems was: a. Setup time b. Lack of input devices c. Inability to get hardcopy output d. All of the above ANS: A 21. An example of a hardware feature that ...
... c. New hardware is designed and implemented in the computer system d. All of the above ANS: C 20. A major problem with early serial processing systems was: a. Setup time b. Lack of input devices c. Inability to get hardcopy output d. All of the above ANS: A 21. An example of a hardware feature that ...
Week-3
... and interpreters sometimes provided Program loading and execution- Absolute loaders, relocatable 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 interpreters sometimes provided Program loading and execution- Absolute loaders, relocatable 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, ...
Running Linux and AUTOSAR side by side
... system is to implement all parts to the same standards according to the highest level of criticality on top of a common real-time operating system. This means all interactive parts, including driver software and the complete user interface would have to be implemented as real-time tasks. This introd ...
... system is to implement all parts to the same standards according to the highest level of criticality on top of a common real-time operating system. This means all interactive parts, including driver software and the complete user interface would have to be implemented as real-time tasks. This introd ...
2. Operating System Case Study: Linux
... multiuser: OS that can simultaneously serve a number of users multitasking: OS that can simultaneously execute a number of programs ...
... multiuser: OS that can simultaneously serve a number of users multitasking: OS that can simultaneously execute a number of programs ...
Acorn MOS
Acorn's Machine Operating System (MOS) or OS was a computer operating system used in the Acorn BBC computer range. It included support for four-channel sound and graphics, file system abstraction, and digital and analogue I/O including a daisy-chained fast expansion bus. The implementation was single-tasking, monolithic and non-reentrant.Versions 0.10 to 1.20 were used on the BBC Micro, version 1.00 on the Electron, version 2 was used on the B+, and versions 3 to 5 were used in the BBC Master Series range.The final BBC computer, the BBC A3000, was 32-bit and ran RISC OS. Its operating system used portions of the Acorn MOS architecture and shared a number of characteristics (commands, VDU system) with the earlier 8-bit MOS.Versions 0 and 1 of the MOS were 16KiB in size, written in 6502 machine code, and held in ROM on the motherboard. The upper quarter of the 16-bit address space (0xC000 to 0xFFFF) is reserved for its ROM code and I/O space.Versions 2 to 5 were still restricted to a 16KiB address space but managed to hold more code and hence more complex routines, partly because of the alternative 65C102 CPU with its denser instruction set plus the careful use of paging.