CSE 30341
... – Switching between jobs happens so frequently that users can interact with each job while it is running: interac5ve compu5ng – Response 5me (e.g., < 1 second) – Each user has at least 1 program execu+ng in memory (process) – If several jobs ready to run at the same +me: CPU scheduling – ...
... – Switching between jobs happens so frequently that users can interact with each job while it is running: interac5ve compu5ng – Response 5me (e.g., < 1 second) – Each user has at least 1 program execu+ng in memory (process) – If several jobs ready to run at the same +me: CPU scheduling – ...
ppt - Computer Science
... • SPIN doesn’t define thread model, instead defines structure upon which different threading models can be implemented. • This structure is defined by a set of events coordinating processor allocation between schedulers and thread packages • SPIN provides Strands • An application-specific thread pac ...
... • SPIN doesn’t define thread model, instead defines structure upon which different threading models can be implemented. • This structure is defined by a set of events coordinating processor allocation between schedulers and thread packages • SPIN provides Strands • An application-specific thread pac ...
Computer Systems - BYU Computer Science Students Homepage
... Media rich information within the grasp of common people - information with psuedo-real time components like voice and video. Operating systems will have to adjust to deliver acceptable performance for these new forms of data. ...
... Media rich information within the grasp of common people - information with psuedo-real time components like voice and video. Operating systems will have to adjust to deliver acceptable performance for these new forms of data. ...
Document
... Threads may or may not begin running when created. A thread may be suspended between any two ...
... Threads may or may not begin running when created. A thread may be suspended between any two ...
ppt
... about to be returned to user mode 2. The second technique applies to critical sections that occur in an interrupt service routines – By using the processor’s interrupt control hardware to disable interrupts during a critical section, the kernel guarantees that it can proceed without the risk of conc ...
... about to be returned to user mode 2. The second technique applies to critical sections that occur in an interrupt service routines – By using the processor’s interrupt control hardware to disable interrupts during a critical section, the kernel guarantees that it can proceed without the risk of conc ...
PowerPoint XP
... One application uses only the processor One application uses only the disk drive Completion time is shorter when running both concurrently than consecutively ...
... One application uses only the processor One application uses only the disk drive Completion time is shorter when running both concurrently than consecutively ...
Chapter 14
... to a backing store, and then brought back into memory for continued execution. Backing store – fast disk large enough to accommodate copies of all memory images for all users; must provide direct access to these memory images. Roll out, roll in – swapping variant used for prioritybased scheduling al ...
... to a backing store, and then brought back into memory for continued execution. Backing store – fast disk large enough to accommodate copies of all memory images for all users; must provide direct access to these memory images. Roll out, roll in – swapping variant used for prioritybased scheduling al ...
Abstract View of System Components
... Spooling and a file system can provide virtual card readers and virtual line printers. A normal user time-sharing terminal serves as the virtual ...
... Spooling and a file system can provide virtual card readers and virtual line printers. A normal user time-sharing terminal serves as the virtual ...
Operating System Concepts
... part of it is blocked (e.g. In a browser, multiple threads are working simultaneously to increase responsiveness) Resource sharing - threads share the memory and resources of the process (lower main memory requirement) Economy - it is more economical to create and context-switch threads (because the ...
... part of it is blocked (e.g. In a browser, multiple threads are working simultaneously to increase responsiveness) Resource sharing - threads share the memory and resources of the process (lower main memory requirement) Economy - it is more economical to create and context-switch threads (because the ...
Operating-System Structures
... process creation and deletion. process suspension and resumption (scheduling). mechanisms for: process synchronization process communication deadlock handling. CSC 4103: Operating Systems ...
... process creation and deletion. process suspension and resumption (scheduling). mechanisms for: process synchronization process communication deadlock handling. CSC 4103: Operating Systems ...
Power Point XP - FSU Computer Science
... power is rarely needed Threads are for experts only Use events as primary development tool (both GUIs and distributed systems) Use threads only for performance-critical ...
... power is rarely needed Threads are for experts only Use events as primary development tool (both GUIs and distributed systems) Use threads only for performance-critical ...
Chap 01 -Tbook.Ver.9
... What is an Operating System? A program that acts as an intermediary/interface between a user of a ...
... What is an Operating System? A program that acts as an intermediary/interface between a user of a ...
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 ...
Lecture-Review-Process
... introduction of multi-programming: – Load multiple processes into memory, and switch to another process if current process is (momentarily) blocked – This required protection and isolation between these processes, implemented by a privileged kernel: dualmode operation. ...
... introduction of multi-programming: – Load multiple processes into memory, and switch to another process if current process is (momentarily) blocked – This required protection and isolation between these processes, implemented by a privileged kernel: dualmode operation. ...
OS Structures and Java
... A process is a program in execution. A process needs CPU time, memory, files, and I/O devices, to accomplish its task. The operating system is responsible for Process creation and deletion (= starting and terminating a program execution) process suspension and resumption (= letting a program wai ...
... A process is a program in execution. A process needs CPU time, memory, files, and I/O devices, to accomplish its task. The operating system is responsible for Process creation and deletion (= starting and terminating a program execution) process suspension and resumption (= letting a program wai ...
Linux Kernel - Teacher Pages
... fork creates a new process with its own entirely new process context clone creates a new process with its own identity, but that is allowed to share the data structures of its parent Deep versus shallow copy ...
... fork creates a new process with its own entirely new process context clone creates a new process with its own identity, but that is allowed to share the data structures of its parent Deep versus shallow copy ...
Threading
... the information to make threading efficient (such as knowing which threads are waiting for I/O and for how long), whereas a software library may not have this information available. In the rest of our discussion, we'll generally assume this native threads model. Operating systems schedule threads in ...
... the information to make threading efficient (such as knowing which threads are waiting for I/O and for how long), whereas a software library may not have this information available. In the rest of our discussion, we'll generally assume this native threads model. Operating systems schedule threads in ...
Processes, Threads and Address Spaces
... • Variable priority class – A thread’s priority begins at some initial assigned value and then may change, up or down, during the thread’s lifetime – There is a FIFO queue at each priority level, but a thread may migrate to other queues within the variable priority class – The initial priority of a ...
... • Variable priority class – A thread’s priority begins at some initial assigned value and then may change, up or down, during the thread’s lifetime – There is a FIFO queue at each priority level, but a thread may migrate to other queues within the variable priority class – The initial priority of a ...
1.01
... System call – request to the operating system to allow user to wait for I/O completion. Device-status table contains entry for each I/O device indicating its type, address, and state. Operating system indexes into I/O device table to determine device status and to modify table entry to include ...
... System call – request to the operating system to allow user to wait for I/O completion. Device-status table contains entry for each I/O device indicating its type, address, and state. Operating system indexes into I/O device table to determine device status and to modify table entry to include ...
Operating Systems
... execute: a) same program, same code. b) same program, different code. c) before terminating, the parent waits for the child to finish its task. ...
... execute: a) same program, same code. b) same program, different code. c) before terminating, the parent waits for the child to finish its task. ...
Lecture 1: Course Introduction and Overview
... • Give pieces of resources to different processes (Protection): – Controlled access to non-CPU resources – Example mechanisms: » Memory Mapping: Give each process their own address space » Kernel/User duality: Arbitrary multiplexing of I/O through system calls ...
... • Give pieces of resources to different processes (Protection): – Controlled access to non-CPU resources – Example mechanisms: » Memory Mapping: Give each process their own address space » Kernel/User duality: Arbitrary multiplexing of I/O through system calls ...
Lecture 1 - Concepts of the UNIX Operating System
... 1. Many UNIX commands (called filters) possess an unusual property in that the output of one command can be connected to the input of another. In this way, pipelines of two or more commands can be set up to handle complex text manipulation tasks. You can’t have a pipeline of interactive commands. 2. ...
... 1. Many UNIX commands (called filters) possess an unusual property in that the output of one command can be connected to the input of another. In this way, pipelines of two or more commands can be set up to handle complex text manipulation tasks. You can’t have a pipeline of interactive commands. 2. ...
ppt
... Child duplicate of parent Child has a program loaded into it UNIX examples fork system call creates new process exec system call used after a fork to replace the process’ memory space with a ...
... Child duplicate of parent Child has a program loaded into it UNIX examples fork system call creates new process exec system call used after a fork to replace the process’ memory space with a ...
Process
... Child process may return output to parent process, and all child’s resources are de-allocated. Other termination possibilities ...
... Child process may return output to parent process, and all child’s resources are de-allocated. Other termination possibilities ...