Scheduling
... Each kernel half has a stack and saved registers. Many processes may be sleep()ing in the kernel. ...
... Each kernel half has a stack and saved registers. Many processes may be sleep()ing in the kernel. ...
What is an Operating System?
... One or more CPUs, device controllers connect through common bus providing access to shared memory ...
... One or more CPUs, device controllers connect through common bus providing access to shared memory ...
Chapter 1: Introduction
... One or more CPUs, device controllers connect through common bus providing access to shared memory ...
... One or more CPUs, device controllers connect through common bus providing access to shared memory ...
introduction
... In such systems, it is difficult to draw a clear boundary. Everything running in kernel mode is clearly part of the operating system, but some programs running outside it are arguably also part of it, or at least closely associated with it. Operating systems differ from user (i.e., application) prog ...
... In such systems, it is difficult to draw a clear boundary. Everything running in kernel mode is clearly part of the operating system, but some programs running outside it are arguably also part of it, or at least closely associated with it. Operating systems differ from user (i.e., application) prog ...
Module 3: Operating
... permanently, the computer system must provide secondary storage to back up main memory. Most modern computer systems use disks as the principle on-line storage medium, for both programs and data. The operating system is responsible for the following activities in connection with disk management: ...
... permanently, the computer system must provide secondary storage to back up main memory. Most modern computer systems use disks as the principle on-line storage medium, for both programs and data. The operating system is responsible for the following activities in connection with disk management: ...
CPU Scheduling
... process P3, and 0 milliseconds for process P4. Thus, the average waiting time is (3+16+9+0)/4=7 milliseconds. If we were using FCFS scheduling scheme, then the average waiting time would be 10.25 milliseconds. The SJF scheduling algorithm is provably optimal, in that it givers the minimum average w ...
... process P3, and 0 milliseconds for process P4. Thus, the average waiting time is (3+16+9+0)/4=7 milliseconds. If we were using FCFS scheduling scheme, then the average waiting time would be 10.25 milliseconds. The SJF scheduling algorithm is provably optimal, in that it givers the minimum average w ...
WHAT IS THE DOS BOOT SEQUENCE??
... Step 5 - Services Load. This step begins with the starting of the Session Manager (Smss.exe). It will run the programs listed in its BootExecute Registry entry, as well as starting the required subsystems. The Win32 subsystem will then start Winlogon.exe, which starts the Local Security Administrat ...
... Step 5 - Services Load. This step begins with the starting of the Session Manager (Smss.exe). It will run the programs listed in its BootExecute Registry entry, as well as starting the required subsystems. The Win32 subsystem will then start Winlogon.exe, which starts the Local Security Administrat ...
Chapter 4 - John Rouda
... those that are nonpreemptive • The goals of process scheduling policies in singlecore CPUs • Up to six different process scheduling algorithms • The role of internal interrupts and the tasks performed by the interrupt handler Understanding Operating Systems, Fifth Edition ...
... those that are nonpreemptive • The goals of process scheduling policies in singlecore CPUs • Up to six different process scheduling algorithms • The role of internal interrupts and the tasks performed by the interrupt handler Understanding Operating Systems, Fifth Edition ...
Chap. 2, Operating System Structures
... I/O operations - A running program may require I/O, which may involve a file or an I/O device ...
... I/O operations - A running program may require I/O, which may involve a file or an I/O device ...
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 ...
Homework 1
... silicon-version of an x86. In class we will use the Bochs PC Emulator. This emulator has been around for quite a while, and is slow and quirky but has a great many useful features. Another freely available PC emulator is QEMU, which is much faster than Bochs but has less mature debugging facilities. ...
... silicon-version of an x86. In class we will use the Bochs PC Emulator. This emulator has been around for quite a while, and is slow and quirky but has a great many useful features. Another freely available PC emulator is QEMU, which is much faster than Bochs but has less mature debugging facilities. ...
Introduction
... 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 ...
thread
... Last Lecture • Hierarchical structure in Operating Systems • System calls and interrupts • Representing processes in Operating Systems • Overview of process scheduling ...
... Last Lecture • Hierarchical structure in Operating Systems • System calls and interrupts • Representing processes in Operating Systems • Overview of process scheduling ...
Guide-to-UNIX-Using-Linux-4th-Edition-Michael-Palmer-Test-Bank
... Peer-to-peer networks,which are often used on small networks, are more distributed than server-based networks. In a peer-to-peer configuration, each system on the network is both a server and a client. There is no central server to manage user accounts; instead, each peer offers its own shared resou ...
... Peer-to-peer networks,which are often used on small networks, are more distributed than server-based networks. In a peer-to-peer configuration, each system on the network is both a server and a client. There is no central server to manage user accounts; instead, each peer offers its own shared resou ...
What is an Operating System?
... One or more CPUs, device controllers connect through common bus providing access to shared memory ...
... One or more CPUs, device controllers connect through common bus providing access to shared memory ...
Lecture-4
... Fixed priority scheduling; (i.e., serve all from foreground then from background). Danger of starvation. Time slice – each queue gets a certain amount of CPU time which it can schedule amongst its processes; i.e., 80% to foreground in RR 20% to background in FCFS ...
... Fixed priority scheduling; (i.e., serve all from foreground then from background). Danger of starvation. Time slice – each queue gets a certain amount of CPU time which it can schedule amongst its processes; i.e., 80% to foreground in RR 20% to background in FCFS ...
Threads Implementation
... • Thread creation is done through clone() system call. • clone() allows a child task to share the address space of the parent task (process). • This sharing of the address space allows the cloned child task to behave much like a separate thread. A. Frank - P. Weisberg ...
... • Thread creation is done through clone() system call. • clone() allows a child task to share the address space of the parent task (process). • This sharing of the address space allows the cloned child task to behave much like a separate thread. A. Frank - P. Weisberg ...
Appendix C - Windows 2000
... Server. (At that time, 16-bit Windows was at Version 3.1.) Windows NT version 4.0 adopted the Windows 95 user interface and incorporated Internet web-server and web-browser software. In addition, user-interface routines and graphics code were moved into the kernel to improve performance, with the si ...
... Server. (At that time, 16-bit Windows was at Version 3.1.) Windows NT version 4.0 adopted the Windows 95 user interface and incorporated Internet web-server and web-browser software. In addition, user-interface routines and graphics code were moved into the kernel to improve performance, with the si ...
File System - UC Davis Computer Science
... File code: specifies if the i-node represents a directory, an ordinary user file, or a “special file” (typically an I/O device) • Size: length of file in bytes • Block list: locates contents of file (in the file contents ...
... File code: specifies if the i-node represents a directory, an ordinary user file, or a “special file” (typically an I/O device) • Size: length of file in bytes • Block list: locates contents of file (in the file contents ...
Presentation
... and call it back when the user, or a program under the user’s control, wants it • To achieve all this, the operating system typically groups disk sectors in some logical way, creates a record of this structure, and builds a directory to track the type of data stored in each file Chapter 3 ...
... and call it back when the user, or a program under the user’s control, wants it • To achieve all this, the operating system typically groups disk sectors in some logical way, creates a record of this structure, and builds a directory to track the type of data stored in each file Chapter 3 ...
Processes - Computer and Information Science
... Message system – processes communicate with each other without resorting to shared variables IPC facility provides two operations: send(message) – message size fixed or variable ...
... Message system – processes communicate with each other without resorting to shared variables IPC facility provides two operations: send(message) – message size fixed or variable ...
Processes - UCSB Computer Science
... Process executes last statement and asks the operating system to ...
... Process executes last statement and asks the operating system to ...
What is an Operating System?
... ■ To provide a grand tour of the major operating systems components ■ To provide coverage of basic computer system organization ■ We cover about half the book. ■ More emphasis on Linux since it is the environment for the assignments. ■ Use the assignments to provide practical examples of how to use ...
... ■ To provide a grand tour of the major operating systems components ■ To provide coverage of basic computer system organization ■ We cover about half the book. ■ More emphasis on Linux since it is the environment for the assignments. ■ Use the assignments to provide practical examples of how to use ...