Disco: Running Commodity Operating Systems on Scalable
... All disk DMA requests are caught and analyzed. If the data is already in memory, we don’t have to go to disk for it. If the request is for a full page, we just update a pointer in the requesting virtual machine. So what? Multiple VM’s can share data without being aware of ...
... All disk DMA requests are caught and analyzed. If the data is already in memory, we don’t have to go to disk for it. If the request is for a full page, we just update a pointer in the requesting virtual machine. So what? Multiple VM’s can share data without being aware of ...
Kernel designs explained
... the original beef, plus that of the plastic bags and string. Therefore, while a microkernel may appear simple on a very local level, at a global level it will be much more complex than a similar monolithic kernel. This complexity also creates performance issues (Chen & Bershad, 1994). Simply put, th ...
... the original beef, plus that of the plastic bags and string. Therefore, while a microkernel may appear simple on a very local level, at a global level it will be much more complex than a similar monolithic kernel. This complexity also creates performance issues (Chen & Bershad, 1994). Simply put, th ...
CITS2002 Systems Programming An Introduction to Operating
... Another major development occurring in parallel was the phenomenal growth in minicomputers, starting with the DEC (Digital Equipment Corporation) PDP1 (Programmed Data Processor) in 1961. The PDP-1, with 4K of 18-bit words cost only US$120,000 - 5% of the IBM 7094. The trend was towards many small m ...
... Another major development occurring in parallel was the phenomenal growth in minicomputers, starting with the DEC (Digital Equipment Corporation) PDP1 (Programmed Data Processor) in 1961. The PDP-1, with 4K of 18-bit words cost only US$120,000 - 5% of the IBM 7094. The trend was towards many small m ...
Chapter 6: Operating Systems: The Genie in the Computer
... The operating system: A collection of programs that manages and controls applications and other software, and coordinates the various hardware components to perform tasks requested by the user. • Allows use of (partial list!) – the keyboard – the mouse – printing to a printer of your choice – viewin ...
... The operating system: A collection of programs that manages and controls applications and other software, and coordinates the various hardware components to perform tasks requested by the user. • Allows use of (partial list!) – the keyboard – the mouse – printing to a printer of your choice – viewin ...
1 CS323-554 Systems Programming chapter1 page Chapter 1
... Each device controller is in charge of a specific type of device (for example, disk drives, tape drives, line printers). A device controller maintains some local buffer storage and a set of special purpose registers. The device controller is responsible for moving data between the peripheral device ...
... Each device controller is in charge of a specific type of device (for example, disk drives, tape drives, line printers). A device controller maintains some local buffer storage and a set of special purpose registers. The device controller is responsible for moving data between the peripheral device ...
Support Notes for SUSE LINUX Enterprise Servers HP Part Number: 5900-0402
... 15. The ELILO bootloader can pass command-line options to the Linux kernel. The max_addr= and mem= options limit the amount of memory used by the kernel. Some versions of the kernel handle these arguments incorrectly, resulting in an MCA that crashes the system during boot. If the system boots succe ...
... 15. The ELILO bootloader can pass command-line options to the Linux kernel. The max_addr= and mem= options limit the amount of memory used by the kernel. Some versions of the kernel handle these arguments incorrectly, resulting in an MCA that crashes the system during boot. If the system boots succe ...
Mod1: Chapter 1 (and a little extra)
... primarily in C language.It can be changed up slightly to work on different hardware (which is why we have so many versions from the different companies) ...
... primarily in C language.It can be changed up slightly to work on different hardware (which is why we have so many versions from the different companies) ...
- Saraswathi Velu College of Engineering
... An operating system is a program that manages the computer hardware. it act as an intermediate between a users of a computer and the computer hardware. It controls and coordinates the use of the hardware among the various application programs for the various users. 2.What is the kernel? A more commo ...
... An operating system is a program that manages the computer hardware. it act as an intermediate between a users of a computer and the computer hardware. It controls and coordinates the use of the hardware among the various application programs for the various users. 2.What is the kernel? A more commo ...
Fundamental Concepts of Operating Systems
... Pace University December 4, 2002 Chapter 1: Introduction ...
... Pace University December 4, 2002 Chapter 1: Introduction ...
The Operating System As A Signalling Mechanism
... our architecture easily takes advantage of such programmable peripherals, as opposed to the awkward manner in which they are used by current operating systems. Even when programmability is not a feature, scatter-gather I/O can be used to compose the data with network headers without having to copy t ...
... our architecture easily takes advantage of such programmable peripherals, as opposed to the awkward manner in which they are used by current operating systems. Even when programmability is not a feature, scatter-gather I/O can be used to compose the data with network headers without having to copy t ...
Server Security Policy
... This document and the information contained herein are confidential to and the property of Webdunia (I) Pvt. Ltd. Unauthorized access, copying and replication are prohibited. This document must not be copied in whole or part by any means, without the written authorization of Webdunia (India) Pvt. Lt ...
... This document and the information contained herein are confidential to and the property of Webdunia (I) Pvt. Ltd. Unauthorized access, copying and replication are prohibited. This document must not be copied in whole or part by any means, without the written authorization of Webdunia (India) Pvt. Lt ...
Linux - the most important … Linux: SHELL ~$ command –options
... history – list sheel command history, to select from the list type (!number) whereis, whatis, locate, which, type – Locate / display a command info sort - Sorts standard input then outputs the sorted result on standard output. uniq - Given a sorted stream of data from standard input, it removes dupl ...
... history – list sheel command history, to select from the list type (!number) whereis, whatis, locate, which, type – Locate / display a command info sort - Sorts standard input then outputs the sorted result on standard output. uniq - Given a sorted stream of data from standard input, it removes dupl ...
Cont.
... • hence the programs share the CPU • but, this is a different kind of sharing than before... • Time-multiplexed sharing • “a resource is not divided into units, but instead, one program is assigned the entire resource for a period of time” ...
... • hence the programs share the CPU • but, this is a different kind of sharing than before... • Time-multiplexed sharing • “a resource is not divided into units, but instead, one program is assigned the entire resource for a period of time” ...
... other processes have access to those resources, and what level of trust they place in those other processes. As an example, consider the semantics of the UNIX fork system call. It spawns a new process initially identical to the currently running one. This involves copying the entire virtual address ...
Operating system
... • Program creation: The OS provides a variety of facilities and services, such as editors and debuggers, to assist the programmer in creating programs. Typically, these services are in the form of utility programs that are not actually part of the OS but are accessible through the OS. • Program exec ...
... • Program creation: The OS provides a variety of facilities and services, such as editors and debuggers, to assist the programmer in creating programs. Typically, these services are in the form of utility programs that are not actually part of the OS but are accessible through the OS. • Program exec ...
slides - Embedded System and Wireless Networking Lab National
... The operating system must switch rapidly from one job (for one user) to next, such that each user is given the impression that the entire computer system is dedicated to his use. ...
... The operating system must switch rapidly from one job (for one user) to next, such that each user is given the impression that the entire computer system is dedicated to his use. ...
Kernel Control Path
... • Kernel control path can preempt a running process; however, when an interrupt handle terminates, the process resumes. • Only kernel control path can interrupt another kernel control path. ...
... • Kernel control path can preempt a running process; however, when an interrupt handle terminates, the process resumes. • Only kernel control path can interrupt another kernel control path. ...
Linux+ Guide to Linux Certification
... hierarchical and indented list – Options allow user to delete files while tree is being generated – TREE /F displays names of files in each directory – Can also be used to delete file that’s duplicated on several different directories ...
... hierarchical and indented list – Options allow user to delete files while tree is being generated – TREE /F displays names of files in each directory – Can also be used to delete file that’s duplicated on several different directories ...
Linux+ Guide to Linux Certification
... • UNIX file management system organizes disk into blocks of 512 bytes each • Divides disk into four basic regions: – First region (address 0) reserved for booting – Second region contains size of disk and boundaries of other regions – Third region includes list of file definitions, “i-list,” – Remai ...
... • UNIX file management system organizes disk into blocks of 512 bytes each • Divides disk into four basic regions: – First region (address 0) reserved for booting – Second region contains size of disk and boundaries of other regions – Third region includes list of file definitions, “i-list,” – Remai ...
No Slide Title - ECE Users Pages
... user of a computer and the computer hardware. • Operating system goals: – Execute user programs and make solving user problems easier. – Make the computer system convenient to use. • Use the computer hardware in an efficient manner. • Make it easy to write programs by handling common tasks like text ...
... user of a computer and the computer hardware. • Operating system goals: – Execute user programs and make solving user problems easier. – Make the computer system convenient to use. • Use the computer hardware in an efficient manner. • Make it easy to write programs by handling common tasks like text ...
PDF
... eventually forwards them to the physical devices. Installing drivers for DISCO I/O in the guest OS. DISCO must intercept DMA requests to translate the physical addresses into machine addresses. DISCO’s device drivers then interact directly with the physical device. All the virtual machines can ...
... eventually forwards them to the physical devices. Installing drivers for DISCO I/O in the guest OS. DISCO must intercept DMA requests to translate the physical addresses into machine addresses. DISCO’s device drivers then interact directly with the physical device. All the virtual machines can ...
Windows_NT_4
... The Virtual Memory Manager creates and manages address maps for processes. The Virtual Memory Manager also does all physical memory allocation. To improve performance, the VMM implements file memory mapping, memory sharing, and copy-on-write page protection. File memory mapping involves the automati ...
... The Virtual Memory Manager creates and manages address maps for processes. The Virtual Memory Manager also does all physical memory allocation. To improve performance, the VMM implements file memory mapping, memory sharing, and copy-on-write page protection. File memory mapping involves the automati ...
Lecture 1: Course Introduction and Overview
... • “Everything a vendor ships when you order an operating system” is good approximation – But varies wildly ...
... • “Everything a vendor ships when you order an operating system” is good approximation – But varies wildly ...
• Chapter 1: Introduction
... • Distribute the computation among several physical processors. • Loosely coupled system – involves connecting 2 or more independent computer systems via communication link. So, each processor has its own O.S. and local memory; processors communicate with one another through various communications l ...
... • Distribute the computation among several physical processors. • Loosely coupled system – involves connecting 2 or more independent computer systems via communication link. So, each processor has its own O.S. and local memory; processors communicate with one another through various communications l ...