ppt
... – very different from POSIX, tough to port – commercial POSIX libraries for Win32 – OS/2 has POSIX option ...
... – very different from POSIX, tough to port – commercial POSIX libraries for Win32 – OS/2 has POSIX option ...
ppt
... – very different from POSIX, tough to port – commercial POSIX libraries for Win32 – OS/2 has POSIX option ...
... – very different from POSIX, tough to port – commercial POSIX libraries for Win32 – OS/2 has POSIX option ...
Operating-System Structures
... detecting errors in the CPU and memory hardware, in I/O devices, or in user programs. Additional functions exist not for helping the user, but rather for ensuring efficient system operations. Resource allocation – allocating resources to multiple users or multiple jobs running at the same time. ...
... detecting errors in the CPU and memory hardware, in I/O devices, or in user programs. Additional functions exist not for helping the user, but rather for ensuring efficient system operations. Resource allocation – allocating resources to multiple users or multiple jobs running at the same time. ...
MEMORY MANAGEMENT
... indicates that process B is executing.Process A was previously executing but has been temporarily interrupted. The contents of all the registers at the moment of A’s interruption were recorded in its execution context. Later, the OS can perform a process switch and resume execution of process A. The ...
... indicates that process B is executing.Process A was previously executing but has been temporarily interrupted. The contents of all the registers at the moment of A’s interruption were recorded in its execution context. Later, the OS can perform a process switch and resume execution of process A. The ...
Operating- System Structures
... is kept only where it is needed and is accessible only within a defined and restricted area, so any bugs affecting that data must be limited to a specific module or layer. ...
... is kept only where it is needed and is accessible only within a defined and restricted area, so any bugs affecting that data must be limited to a specific module or layer. ...
Overview and History
... Linux history Linux is a modern, free operating system based on UNIX standards first developed as a small but self-contained kernel in 1991 by Linus Torvalds, with the major design goal of UNIX compatibility. its history has been one of collaboration by many users from all around the world, cor ...
... Linux history Linux is a modern, free operating system based on UNIX standards first developed as a small but self-contained kernel in 1991 by Linus Torvalds, with the major design goal of UNIX compatibility. its history has been one of collaboration by many users from all around the world, cor ...
Slide 1
... if one or more processes were sleeping on that semaphore (unable to complete down operation), one of them is chosen by the system at random and allowed to complete its Down ...
... if one or more processes were sleeping on that semaphore (unable to complete down operation), one of them is chosen by the system at random and allowed to complete its Down ...
A1_OS Review
... keeps several jobs in memory simultaneously. It selects a job from the ready state and starts executing it. When that job needs to wait for some event the CPU is switched to another job. Primary objective: eliminate CPU idle time Time sharing: An extension of multiprogramming. After a certain amount ...
... keeps several jobs in memory simultaneously. It selects a job from the ready state and starts executing it. When that job needs to wait for some event the CPU is switched to another job. Primary objective: eliminate CPU idle time Time sharing: An extension of multiprogramming. After a certain amount ...
Chapter 2: OS Structures
... o Provides communication mechanisms so that processes can send (or receive) data to (or from) each other (process communication). o Control concurrent* access to shared data to keep shared data consistent (process synchronization). o Allocate/de-allocate resources properly to prevent or ...
... o Provides communication mechanisms so that processes can send (or receive) data to (or from) each other (process communication). o Control concurrent* access to shared data to keep shared data consistent (process synchronization). o Allocate/de-allocate resources properly to prevent or ...
Answer the following questions clearly but concisely. What is multiprogramming? 1.
... within the monitor itself. 26. Consider a system consisting of processes P1, P2, ..., Pn, each of which has a unique priority number. Write a monitor that allocates three identical line printers to these processes, using the priority numbers for deciding the order of allocatio ...
... within the monitor itself. 26. Consider a system consisting of processes P1, P2, ..., Pn, each of which has a unique priority number. Write a monitor that allocates three identical line printers to these processes, using the priority numbers for deciding the order of allocatio ...
Process Control
... z a) Is it possible that you would to allow a process to wait on more than one event at the same time? Provide an example. z b) In that case, how you modify the queuing structure of the figure to support this new feature? ...
... z a) Is it possible that you would to allow a process to wait on more than one event at the same time? Provide an example. z b) In that case, how you modify the queuing structure of the figure to support this new feature? ...
pdf
... • There must be a system call instruction that switches from user to kernel mode • The system call instruction usually does the following: – causes an exception, which vectors to a kernel handler – passes a parameter, saying which system routine to call – saves caller’s state (PC, SP, other register ...
... • There must be a system call instruction that switches from user to kernel mode • The system call instruction usually does the following: – causes an exception, which vectors to a kernel handler – passes a parameter, saying which system routine to call – saves caller’s state (PC, SP, other register ...
Document
... method of keeping track of how and where programs are loading into the main memory. Memory is a large array of words or bytes, each with its own address. ...
... method of keeping track of how and where programs are loading into the main memory. Memory is a large array of words or bytes, each with its own address. ...
lecture05-chapter03
... • Traditionally, the OS created all processes – But it can be useful to let a running process create another – This action is called process spawning • Parent Process is the original, creating, process • Child Process is the new process ...
... • Traditionally, the OS created all processes – But it can be useful to let a running process create another – This action is called process spawning • Parent Process is the original, creating, process • Child Process is the new process ...
Introduction to Object Technology
... – internal and external hardware errors • memory error • device failure ...
... – internal and external hardware errors • memory error • device failure ...
process - United International College
... – Unlike other problems in concurrent process management, there is no efficient solution in the general case. ...
... – Unlike other problems in concurrent process management, there is no efficient solution in the general case. ...
Tutorial 1 Answers File
... *Enable multimedia use for voice and video composition or reproduction, such as recording video from a *camera or playing music ...
... *Enable multimedia use for voice and video composition or reproduction, such as recording video from a *camera or playing music ...
Operating-System Structures - Stanford Computer Graphics
... I/O operations – since user programs cannot execute I/O operations directly, the operating system must provide some means to perform I/O. File-system manipulation – program capability to read, write, create, and delete files. Communications – exchange of information between processes executing eithe ...
... I/O operations – since user programs cannot execute I/O operations directly, the operating system must provide some means to perform I/O. File-system manipulation – program capability to read, write, create, and delete files. Communications – exchange of information between processes executing eithe ...
Introduction
... I/O devices busy at all times – When it has to wait (for I/O for example), OS switches to another job – Multiprogramming organizes jobs (code and data) so CPU always has one to execute – A subset of total jobs in system is kept in memory – One job selected and run via job scheduling ...
... I/O devices busy at all times – When it has to wait (for I/O for example), OS switches to another job – Multiprogramming organizes jobs (code and data) so CPU always has one to execute – A subset of total jobs in system is kept in memory – One job selected and run via job scheduling ...
DS Chapter 6
... another job Timesharing (multitasking) is logical extension in which 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 If s ...
... another job Timesharing (multitasking) is logical extension in which 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 If s ...
process
... another job Timesharing (multitasking) is logical extension in which 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 If s ...
... another job Timesharing (multitasking) is logical extension in which 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 If s ...