Chapter I Introduction
... – 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 ...
... – 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 ...
壹 - 國立彰化師範大學進修學院
... a. memory b. process c. device d. files 53. To prevent , an operating system can put resource restrictions on process. a. starvation b. synchronization c. paging d. deadlock ...
... a. memory b. process c. device d. files 53. To prevent , an operating system can put resource restrictions on process. a. starvation b. synchronization c. paging d. deadlock ...
Week-09.2-1
... programmers to interact with the computer system directly, while still sharing its resources. A timesharing system allows multiple users to interact with a computer at the same time. In a timesharing system, each user has his or her own virtual machine, in which all system resources are (in effect) ...
... programmers to interact with the computer system directly, while still sharing its resources. A timesharing system allows multiple users to interact with a computer at the same time. In a timesharing system, each user has his or her own virtual machine, in which all system resources are (in effect) ...
Operating Systems: Process Management
... Other UNIX commands top – process list, continuously updated jobs – list jobs running in current shell bg, fg – send jobs to back/foreground at – run batch job at specified time(s) kill – send signal to terminate process sleep – pause for some seconds 27 March 2003 ...
... Other UNIX commands top – process list, continuously updated jobs – list jobs running in current shell bg, fg – send jobs to back/foreground at – run batch job at specified time(s) kill – send signal to terminate process sleep – pause for some seconds 27 March 2003 ...
資工系網媒所NEWS實驗室Chapter 2
... Accounting - To keep track of which users use how much and what kinds of computer resources Protection and security - The owners of information stored in a multiuser or networked computer system may want to control use of that information, concurrent processes should not interfere with each other Pr ...
... Accounting - To keep track of which users use how much and what kinds of computer resources Protection and security - The owners of information stored in a multiuser or networked computer system may want to control use of that information, concurrent processes should not interfere with each other Pr ...
Introduction and History
... When there are multiple programs running, the OS must make each program feel like it solely owns the whole machine (CPU, memory, registers) – virtual machine for each process ...
... When there are multiple programs running, the OS must make each program feel like it solely owns the whole machine (CPU, memory, registers) – virtual machine for each process ...
Tips: To get information about installed OS quickly (for Windows)
... An operating system is the program that, after being initially loaded into the computer by a boot program, manages all the other programs in a computer. The other programs are called applications or application programs. The application programs make use of the operating system by making requests fo ...
... An operating system is the program that, after being initially loaded into the computer by a boot program, manages all the other programs in a computer. The other programs are called applications or application programs. The application programs make use of the operating system by making requests fo ...
Q#1: A _____ is an example of a systems program. Q#2: A
... Ans: ______b_________ (1pt) Q#4: Microkernels use _____ for communication. a) message passing b) shared memory c) system calls d) virtualization Ans: ______A_________ (1pt) Q#5: Which of the following is true: a) Many operating system merge I/O devices and files into a combined file because of the s ...
... Ans: ______b_________ (1pt) Q#4: Microkernels use _____ for communication. a) message passing b) shared memory c) system calls d) virtualization Ans: ______A_________ (1pt) Q#5: Which of the following is true: a) Many operating system merge I/O devices and files into a combined file because of the s ...
In today lecture we take a closer look at how the different types of
... parts of the environment must be moved as well. A process consists of three segments according to Fugetta’s framework: Code segment is the part that contains the set of instructions that make up the program that is being executed. Resource segment contains references to external resources needed ...
... parts of the environment must be moved as well. A process consists of three segments according to Fugetta’s framework: Code segment is the part that contains the set of instructions that make up the program that is being executed. Resource segment contains references to external resources needed ...
Chapter 10 Powerpoint
... and these resources are often shared in one way or another among programs that want to use them ...
... and these resources are often shared in one way or another among programs that want to use them ...
Module 4: Processes
... Processes switch between different states based on internal and external events Each process is in exactly one state at a time As a process executes, it changes state (Typical States of Processes (varies with OS)) new: The process is being created running: Instructions are being executed (only o ...
... Processes switch between different states based on internal and external events Each process is in exactly one state at a time As a process executes, it changes state (Typical States of Processes (varies with OS)) new: The process is being created running: Instructions are being executed (only o ...
Operating Systems CSLO - Barbara Hecker
... 2. What is the KERNEL? Describe the difference between kernel mode and user mode. Provide a complete overview of the features and utilities that most Kernels have. You should compare and contrast kernel features of different Linux/Unix/Windows systems. 3. What is a Process? What is a thread? Describ ...
... 2. What is the KERNEL? Describe the difference between kernel mode and user mode. Provide a complete overview of the features and utilities that most Kernels have. You should compare and contrast kernel features of different Linux/Unix/Windows systems. 3. What is a Process? What is a thread? Describ ...
Lecture 1: Operating System Services What is an Operating System?
... Scheduling: The system has to decide when to introduce new processes into the system and the order in which processes should run. Resource Allocation: When there are multiple process running concurrently, resources must be allocated to each one of them. Example: A compiler. A tape unit. Memory. ...
... Scheduling: The system has to decide when to introduce new processes into the system and the order in which processes should run. Resource Allocation: When there are multiple process running concurrently, resources must be allocated to each one of them. Example: A compiler. A tape unit. Memory. ...
Chapter 9 Uniprocessor Scheduling
... – Currently running process may be interrupted and moved to ready state by the OS – Preemption may occur when new process arrives, on an interrupt, or periodically. ...
... – Currently running process may be interrupted and moved to ready state by the OS – Preemption may occur when new process arrives, on an interrupt, or periodically. ...
4.3 Operations on Processes 4.3.1 Process Creation
... processes to communicate with one another and to synchronize their actions. To illustrate the concept of cooperating processes, let us consider the producerconsumer problem, which is a common paradigm for cooperating processes. A producer process produces information that is consumed by a consumer p ...
... processes to communicate with one another and to synchronize their actions. To illustrate the concept of cooperating processes, let us consider the producerconsumer problem, which is a common paradigm for cooperating processes. A producer process produces information that is consumed by a consumer p ...
evolution of operating systems
... ¾ Developed by the university of NewCastle ¾ A software layer added to UNIX allowed five PDP11 machines to operates with a single ‘distributed’ file system for 5 users ¾ Every machine was both a user machine and a file server ¾ Developed into Sun’s NFS ...
... ¾ Developed by the university of NewCastle ¾ A software layer added to UNIX allowed five PDP11 machines to operates with a single ‘distributed’ file system for 5 users ¾ Every machine was both a user machine and a file server ¾ Developed into Sun’s NFS ...
lecture1
... of a process, the process itself enters kernel space. This means that rather than the process waiting "outside" the kernel; it enters the kernel itself (i.e. the process will start executing kernel code for itself). When a process invokes a system call, the hardware is switched to the kernel setting ...
... of a process, the process itself enters kernel space. This means that rather than the process waiting "outside" the kernel; it enters the kernel itself (i.e. the process will start executing kernel code for itself). When a process invokes a system call, the hardware is switched to the kernel setting ...
Week 9
... completed per unit of time. This is a measure of how much work is being performed. This clearly depends on the average length of a process but is also influenced by the scheduling policy, which may affect utilization. Processor utilization This is the percentage of time that the processor is busy. F ...
... completed per unit of time. This is a measure of how much work is being performed. This clearly depends on the average length of a process but is also influenced by the scheduling policy, which may affect utilization. Processor utilization This is the percentage of time that the processor is busy. F ...
Typical Multiprocessing Configurations
... • Operations WAIT and SIGNAL frees processes from “busy waiting” dilemma and returns control to OS which can then run other jobs while waiting processes are idle. Understanding Operating Systems ...
... • Operations WAIT and SIGNAL frees processes from “busy waiting” dilemma and returns control to OS which can then run other jobs while waiting processes are idle. Understanding Operating Systems ...
Memory Protection: Kernel and User Address Spaces
... program (e.g., loads, stores, and jumps) To use the address of where the program lands in memory ...
... program (e.g., loads, stores, and jumps) To use the address of where the program lands in memory ...
Slide 3: Process Description and Control
... The most fundamental concept in a modern OS is the process ...
... The most fundamental concept in a modern OS is the process ...
Chapter 10 Exercises and Answers
... What is an operating system? An operating system is a piece of software that manages a computer's resources and provides an interface for system interaction. Explain the term multiprogramming. Multiprogramming is the technique of keeping multiple programs in main memory at the same time, each compet ...
... What is an operating system? An operating system is a piece of software that manages a computer's resources and provides an interface for system interaction. Explain the term multiprogramming. Multiprogramming is the technique of keeping multiple programs in main memory at the same time, each compet ...
3.4.1 Shared-Memory Systems
... 3.4 Inter-process Communication Processes executing concurrently in the operating system may be either independent processes or cooperating processes. A process is independent if it cannot affect or be affected by the other processes executing in the system. Any process that does not share data with ...
... 3.4 Inter-process Communication Processes executing concurrently in the operating system may be either independent processes or cooperating processes. A process is independent if it cannot affect or be affected by the other processes executing in the system. Any process that does not share data with ...
What is an operating system? - KOVAN Research Lab
... Share one machine across many different apps: concurrent execution You would be surprised how much slack there is in a typical computer system ...
... Share one machine across many different apps: concurrent execution You would be surprised how much slack there is in a typical computer system ...