lec1
... Requirements: Process isolation, automatic allocation and maintenance, protection and access control, long-term storage facilities. Virtual memory and file system facilities together satisfy all these requirements. Virtual memory allows programs to address the memory from a logical point of view wit ...
... Requirements: Process isolation, automatic allocation and maintenance, protection and access control, long-term storage facilities. Virtual memory and file system facilities together satisfy all these requirements. Virtual memory allows programs to address the memory from a logical point of view wit ...
pdf
... • Soft real-time • OS provides prioritization, on a best-effort basis • No deadline guarantees, but bounded delays • Examples: most electronic appliances ...
... • Soft real-time • OS provides prioritization, on a best-effort basis • No deadline guarantees, but bounded delays • Examples: most electronic appliances ...
hw_ch1
... (10) 4. (text 1.10) What is the difference between kernel and user mode? Explain how having two distinct modes aids in the design of an operating system? ...
... (10) 4. (text 1.10) What is the difference between kernel and user mode? Explain how having two distinct modes aids in the design of an operating system? ...
Course Overview, History
... – Overlaps I/O processing of a job with computation of another – Benefits from I/O devices that can operate asynchronously – Requires the use of interrupts and DMA – Optimizes for throughput at the cost of response time ...
... – Overlaps I/O processing of a job with computation of another – Benefits from I/O devices that can operate asynchronously – Requires the use of interrupts and DMA – Optimizes for throughput at the cost of response time ...
Windows File System
... perform more primitive functions • It provides services to the next higher layer. • Changes in one layer should not require changes in other layers ...
... perform more primitive functions • It provides services to the next higher layer. • Changes in one layer should not require changes in other layers ...
CSC 150 UNGRADED QUIZ - Concordia University Wisconsin
... Allocates and deallocates memory (RAM) for programs and data; Avoids conflicts (protects O/S and application instructions and data); Creates virtual memory, e.g. in Windows by demand paging. Creates illusion we have more memory than we do. ...
... Allocates and deallocates memory (RAM) for programs and data; Avoids conflicts (protects O/S and application instructions and data); Creates virtual memory, e.g. in Windows by demand paging. Creates illusion we have more memory than we do. ...
Microsoft & Linux What Is an Operating System?
... A typical configuration for a network operating system would be a collection of personal computers along with a common printer server and file server for archival storage, all tied together by a local network. Generally speaking, such a system will have most of the following characteristics that dis ...
... A typical configuration for a network operating system would be a collection of personal computers along with a common printer server and file server for archival storage, all tied together by a local network. Generally speaking, such a system will have most of the following characteristics that dis ...
The Unix Philosophy
... that run simultaneously (for example, the Unix OS Kernel is a job which creates other jobs such as scheduling tasks, etc). Running many processes at the same time can allow many users to connect to and use the computer resources at the same time (This concept is referred to as "multitasking"). The U ...
... that run simultaneously (for example, the Unix OS Kernel is a job which creates other jobs such as scheduling tasks, etc). Running many processes at the same time can allow many users to connect to and use the computer resources at the same time (This concept is referred to as "multitasking"). The U ...
Deployment of Sensing Devices on Critical Infrastructure
... – Provides user interface ...as we saw. – Allows applications to run. – What are some tasks you need done even when no apps are running? – Does nearly half of what we ask an application program to do! • Common tasks useful to all programs —put those in the OS (the most basic are put in BIOS) so each ...
... – Provides user interface ...as we saw. – Allows applications to run. – What are some tasks you need done even when no apps are running? – Does nearly half of what we ask an application program to do! • Common tasks useful to all programs —put those in the OS (the most basic are put in BIOS) so each ...
Lecture 5 - Rabie A. Ramadan
... – Provides user interface ...as we saw. – Allows applications to run. – What are some tasks you need done even when no apps are running? – Does nearly half of what we ask an application program to do! • Common tasks useful to all programs —put those in the OS (the most basic are put in BIOS) so each ...
... – Provides user interface ...as we saw. – Allows applications to run. – What are some tasks you need done even when no apps are running? – Does nearly half of what we ask an application program to do! • Common tasks useful to all programs —put those in the OS (the most basic are put in BIOS) so each ...
Multiprogrammed Batch Systems
... Time-Sharing Systems–Interactive Computing Time-sharing or multitasking is an extension of multiprogramming; users can interact with program while it is running and many users to share the computer simultaneously. The CPU is multiplexed among several jobs that are kept in memory and on disk (the CPU ...
... Time-Sharing Systems–Interactive Computing Time-sharing or multitasking is an extension of multiprogramming; users can interact with program while it is running and many users to share the computer simultaneously. The CPU is multiplexed among several jobs that are kept in memory and on disk (the CPU ...
EEN 542 – Digital Integrated Circuits
... Relationship to the Computer Engineering Program Outcomes: (see note below). ...
... Relationship to the Computer Engineering Program Outcomes: (see note below). ...
Lecture1
... Operating System Definition OS is a resource allocator Manages all resources Decides between conflicting requests for efficient and fair resource use OS is a control program Controls execution of programs to prevent errors and improper use of the computer ...
... Operating System Definition OS is a resource allocator Manages all resources Decides between conflicting requests for efficient and fair resource use OS is a control program Controls execution of programs to prevent errors and improper use of the computer ...
unit-1-The-UNIX-Operating-System
... and CPU power were at a premium in those days, UNICS (eventually shortened to UNIX) used short commands to minimize the space needed to store them and the time needed to decode them - hence the tradition of short UNIX commands we use today, e.g. ls, cp, rm, mv etc. Ken Thompson then teamed up with D ...
... and CPU power were at a premium in those days, UNICS (eventually shortened to UNIX) used short commands to minimize the space needed to store them and the time needed to decode them - hence the tradition of short UNIX commands we use today, e.g. ls, cp, rm, mv etc. Ken Thompson then teamed up with D ...
The Evolution of OS
... Simple => minimize the size of the monitor. A job was always loaded into the same location => no need for relocation at load time. • Minimized disk activity. • Problems Raised: – Multiple jobs in memory => memory protection – Multiple users in the system => file protection – Contention for resources ...
... Simple => minimize the size of the monitor. A job was always loaded into the same location => no need for relocation at load time. • Minimized disk activity. • Problems Raised: – Multiple jobs in memory => memory protection – Multiple users in the system => file protection – Contention for resources ...
system call
... series of independent processes called servers each server provides a set of services to other parts of the operating system or to user programs via a defined interface of service requests requesting process (client) requests service by sending a message to server service usually involves messages b ...
... series of independent processes called servers each server provides a set of services to other parts of the operating system or to user programs via a defined interface of service requests requesting process (client) requests service by sending a message to server service usually involves messages b ...
PowerPoint XP
... system: collects a batch of jobs before processing them and printing out results ...
... system: collects a batch of jobs before processing them and printing out results ...
Heading Goes Here
... verification. The major difficulty with layered approach is careful definition of layers, because a layer can only use the layers below it Less efficient than other approaches ...
... verification. The major difficulty with layered approach is careful definition of layers, because a layer can only use the layers below it Less efficient than other approaches ...
slides.01.pdf
... machine, extending the hardware functionality, or (2) bunch of software that manages the hardware resources. Virtual machine: • hide all the messy details of programming the hardware. • construct layers of software that provide more and ...
... machine, extending the hardware functionality, or (2) bunch of software that manages the hardware resources. Virtual machine: • hide all the messy details of programming the hardware. • construct layers of software that provide more and ...
Lecture 1: Overview
... Each level relies on the next lower level to perform more primitive functions This decomposes a problem into a number of more manageable subproblems ...
... Each level relies on the next lower level to perform more primitive functions This decomposes a problem into a number of more manageable subproblems ...
Operating Systems
... program (or OS) what to do next. Command Line Interfaces The GUI has become the standard, for years however computer OS used command line interfaces which are environments that use typewritten commands rather than graphical objects to execute tasks and process data. During the 1980s the most popular ...
... program (or OS) what to do next. Command Line Interfaces The GUI has become the standard, for years however computer OS used command line interfaces which are environments that use typewritten commands rather than graphical objects to execute tasks and process data. During the 1980s the most popular ...
PPT - CSE Home
... written in a high-level language (C) virtual memory hierarchical file system; "everything" is a file lots of small programs that work together to solve larger problems security, users, access, and groups human-readable documentation included ...
... written in a high-level language (C) virtual memory hierarchical file system; "everything" is a file lots of small programs that work together to solve larger problems security, users, access, and groups human-readable documentation included ...
operating system
... frequently needed software modules. Linkers process the machine language code produced by assemblers or compilers and create the final executable module, ready to be run by computer. File handling programs perform a number of low-level tasks for users, such as creating, deleting, moving, copying and ...
... frequently needed software modules. Linkers process the machine language code produced by assemblers or compilers and create the final executable module, ready to be run by computer. File handling programs perform a number of low-level tasks for users, such as creating, deleting, moving, copying and ...
