ppt - CS162
... – Threads can share instructions (good for sharing, bad for protection) – Can threads overwrite OS functions? ...
... – Threads can share instructions (good for sharing, bad for protection) – Can threads overwrite OS functions? ...
CC4201519521
... operating system is primarily designed for smartphones and tablets. Since Android is an open source it has become the fastest growing mobile operating system. Due to its open nature it has become favorite for many consumers and developers. Moreover software developers can easily modify and add enhan ...
... operating system is primarily designed for smartphones and tablets. Since Android is an open source it has become the fastest growing mobile operating system. Due to its open nature it has become favorite for many consumers and developers. Moreover software developers can easily modify and add enhan ...
Chap3
... • Resource allocation – allocating resources to multiple users or multiple jobs running at the same time. • Accounting – keep track of and record which users use how much and what kinds of computer resources for account billing or for accumulating usage statistics. • Protection – ensuring that all a ...
... • Resource allocation – allocating resources to multiple users or multiple jobs running at the same time. • Accounting – keep track of and record which users use how much and what kinds of computer resources for account billing or for accumulating usage statistics. • Protection – ensuring that all a ...
OperatingSystemDesign_SP16_Ch_1_4
... Computer System Architecture Single Processor Systems One General-Purpose CPU ...
... Computer System Architecture Single Processor Systems One General-Purpose CPU ...
Unit04_Software
... Flakey, bugs, crashes, instability. This is especially a problem in modern multitasking environments where one software product or utility conflicts with another resulting in freezes and crashes. ...
... Flakey, bugs, crashes, instability. This is especially a problem in modern multitasking environments where one software product or utility conflicts with another resulting in freezes and crashes. ...
Operating Systems, 082
... 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 ...
Introduction to Unix
... For example, an OS ensures safe access to a printer by allowing only one application program to send data directly to the printer at any one time. An OS encourages efficient use of the CPU by suspending programs that are waiting for I/O operations to complete to make way for programs that can use th ...
... For example, an OS ensures safe access to a printer by allowing only one application program to send data directly to the printer at any one time. An OS encourages efficient use of the CPU by suspending programs that are waiting for I/O operations to complete to make way for programs that can use th ...
Operating System
... Division by zero, invalid memory access, request for operating system service Other process problems include infinite loop, processes modifying each other or the operating system. An error should cause problems only for the one program that was running. Dual-mode operation allows OS to protect i ...
... Division by zero, invalid memory access, request for operating system service Other process problems include infinite loop, processes modifying each other or the operating system. An error should cause problems only for the one program that was running. Dual-mode operation allows OS to protect i ...
No Slide Title
... dispatcher objects control dispatching and synchronization (events, mutants, mutexes, semaphores, threads and timers) ...
... dispatcher objects control dispatching and synchronization (events, mutants, mutexes, semaphores, threads and timers) ...
Chapter 2: Operating-System Structures
... Filesystem manipulation The file system is of particular interest. Obviously, programs need to read and write files and directories, create and delete them, search them, list file Information, permission ...
... Filesystem manipulation The file system is of particular interest. Obviously, programs need to read and write files and directories, create and delete them, search them, list file Information, permission ...
Figure 15.1 A distributed multimedia system
... level: By providing abstractions of the basic resources such as: processes, unlimited virtual memory, files, communication channels Protection of the resources used by applications Concurrent processing to enable applications to complete their work with minimum interference from other applicat ...
... level: By providing abstractions of the basic resources such as: processes, unlimited virtual memory, files, communication channels Protection of the resources used by applications Concurrent processing to enable applications to complete their work with minimum interference from other applicat ...
ch22
... dispatcher objects control dispatching and synchronization (events, mutants, mutexes, semaphores, threads and timers) ...
... dispatcher objects control dispatching and synchronization (events, mutants, mutexes, semaphores, threads and timers) ...
Module 6: CPU Scheduling - University of South Florida
... 1. t n actual length of n th CPU burst 2. n 1 predicted value for the next CPU burst ...
... 1. t n actual length of n th CPU burst 2. n 1 predicted value for the next CPU burst ...
(a) and (b) d) none of the mentioned Answer:c advertisements
... c) connection failure in the network d) all of the mentioned Answer:d 5. The main function of the command interpreter is a) to get and execute the next user-specified command b) to provide the interface between the API and application program c) to handle the files in operating system d) none of the ...
... c) connection failure in the network d) all of the mentioned Answer:d 5. The main function of the command interpreter is a) to get and execute the next user-specified command b) to provide the interface between the API and application program c) to handle the files in operating system d) none of the ...
Addressing Modes
... Memory split into two One for Operating System (monitor) One for currently executing program ...
... Memory split into two One for Operating System (monitor) One for currently executing program ...
Multiprocessor and Distributed Systems
... • Marshalling is the packing of function parameters into a message packet – the RPC stubs call type-specific functions to marshal or unmarshal the parameters of an RPC • Client stub marshals the arguments into a message • Server stub unmarshals the arguments and uses them to invoke the service funct ...
... • Marshalling is the packing of function parameters into a message packet – the RPC stubs call type-specific functions to marshal or unmarshal the parameters of an RPC • Client stub marshals the arguments into a message • Server stub unmarshals the arguments and uses them to invoke the service funct ...
ch2-OS-Structure
... Typically written in a high-level language (C or C++) Mostly accessed by programs via a high-level ...
... Typically written in a high-level language (C or C++) Mostly accessed by programs via a high-level ...
IV. Parallel Operating Systems
... architectures. The physical architecture of a computer system is therefore an important starting point for understanding the operating system that controls it. There are two famous classi cations of parallel computer architectures: Flynn's [Fly72] and Johnson's [Joh88]. 2.1.1 Flynn's classi cation o ...
... architectures. The physical architecture of a computer system is therefore an important starting point for understanding the operating system that controls it. There are two famous classi cations of parallel computer architectures: Flynn's [Fly72] and Johnson's [Joh88]. 2.1.1 Flynn's classi cation o ...
Threads - efreidoc.fr
... ALL entities and services on the system are represented internally by objects e.g. files are represented by objects, as are user programs when they are running on the computer, hardware resources like printers, communication ports, etc. Motivation behind this is to provide a very modular structure w ...
... ALL entities and services on the system are represented internally by objects e.g. files are represented by objects, as are user programs when they are running on the computer, hardware resources like printers, communication ports, etc. Motivation behind this is to provide a very modular structure w ...
Chapter 8 - Operating Systems And Utility Programs - Elearning-KL
... Identify the types of system software Summarize the features of several stand-alone operating systems Summarize the startup process on a personal computer Identify various network operating systems Describe the functions of an operating system ...
... Identify the types of system software Summarize the features of several stand-alone operating systems Summarize the startup process on a personal computer Identify various network operating systems Describe the functions of an operating system ...
A Pattern Language for Secure Operating System Architectures
... • File access control. How do you control access to files in an operating system? Apply the Authorization pattern to describe access to files by subjects. The protection object is now a file component that may be a directory or a file. • Controlled Virtual Address Space. How to control access by pro ...
... • File access control. How do you control access to files in an operating system? Apply the Authorization pattern to describe access to files by subjects. The protection object is now a file component that may be a directory or a file. • Controlled Virtual Address Space. How to control access by pro ...
3. Processes
... Pointer to the next PCB i.e. pointer to the PCB of the next process to run. Process state: The state may be new, ready, running, waiting, halted, and so on. Process number: The identifier of the process (PID). Program counter: The counter indicates the address of the next instruction to be executed ...
... Pointer to the next PCB i.e. pointer to the PCB of the next process to run. Process state: The state may be new, ready, running, waiting, halted, and so on. Process number: The identifier of the process (PID). Program counter: The counter indicates the address of the next instruction to be executed ...
Monday, 26 November, 2007.
... Timesharing (multitasking): CPU switches jobs so frequently that users can interact with each job while it is running, creating interactive computing Response time should be < 1 second Each user has at least one program executing in memory process (a key abstraction!) If several jobs ready to ...
... Timesharing (multitasking): CPU switches jobs so frequently that users can interact with each job while it is running, creating interactive computing Response time should be < 1 second Each user has at least one program executing in memory process (a key abstraction!) If several jobs ready to ...