Interrupts
... control to the exception handler (software). • Since the exception handler can be called at any time, there cannot be any arguments passed or return value. ...
... control to the exception handler (software). • Since the exception handler can be called at any time, there cannot be any arguments passed or return value. ...
HW2 Solution 1. What are the advantages of using a higher
... 4. What are the advantages and disadvantages of using a microkernel approach? One benefit of the microkernel approach is ease of extending the operating system. All new services are added to user space and consequently do not require modification of the kernel. The microkernel also provides more sec ...
... 4. What are the advantages and disadvantages of using a microkernel approach? One benefit of the microkernel approach is ease of extending the operating system. All new services are added to user space and consequently do not require modification of the kernel. The microkernel also provides more sec ...
CS4023_-_lecture_02_..
... Turnaround time (the time it takes to receive finished reports after submission of documents or files for processing ) was reduced to minutes or seconds. Multiprogramming: Process multiple jobs at once; one job could use processor while other jobs used peripheral devices. Timesharing: Advanced opera ...
... Turnaround time (the time it takes to receive finished reports after submission of documents or files for processing ) was reduced to minutes or seconds. Multiprogramming: Process multiple jobs at once; one job could use processor while other jobs used peripheral devices. Timesharing: Advanced opera ...
PPT - CS
... The hard disk can write and read information to and from the main memory. The access speed of main memory is much faster than a hard disk. • Programs are stored on the disk until they are loaded into memory, and then use the disk as both the source and destination of the information for their proces ...
... The hard disk can write and read information to and from the main memory. The access speed of main memory is much faster than a hard disk. • Programs are stored on the disk until they are loaded into memory, and then use the disk as both the source and destination of the information for their proces ...
OSreviewS2004
... • Throughput – # of processes that complete their execution per time unit • Turnaround time – amount of time to execute a particular process (finishing time – arrival time) • Waiting time – amount of time a process has been waiting in the ready queue • Response time – amount of time it takes from wh ...
... • Throughput – # of processes that complete their execution per time unit • Turnaround time – amount of time to execute a particular process (finishing time – arrival time) • Waiting time – amount of time a process has been waiting in the ready queue • Response time – amount of time it takes from wh ...
Slides
... system had limited structuring. The UNIX OS consists of two separable parts – Systems programs – The kernel • Consists of everything below the system-call interface and above the physical hardware • Provides the file system, CPU scheduling, memory management, and other operating-system functions; a ...
... system had limited structuring. The UNIX OS consists of two separable parts – Systems programs – The kernel • Consists of everything below the system-call interface and above the physical hardware • Provides the file system, CPU scheduling, memory management, and other operating-system functions; a ...
Lecture 4: September 11 4.1 Processes 4.2 Memory and Secondary
... area in primary storage. Secondary storage does not lose the data when the device is powered downit is non-volatile. Per unit, it is typically also an order of magnitude less expensive than primary storage. Consequently, modern computer systems typically have an order of magnitude more secondary sto ...
... area in primary storage. Secondary storage does not lose the data when the device is powered downit is non-volatile. Per unit, it is typically also an order of magnitude less expensive than primary storage. Consequently, modern computer systems typically have an order of magnitude more secondary sto ...
CS 3013 Operating Systems
... – ex: debugger needs gui, program, perf monitor… – especially when blocking for I/O! Single ...
... – ex: debugger needs gui, program, perf monitor… – especially when blocking for I/O! Single ...
Chapter 2: Operating-System Structures
... system had limited structuring. The UNIX OS consists of two separable parts – Systems programs – The kernel • Consists of everything below the system-call interface and above the physical hardware • Provides the file system, CPU scheduling, memory management, and other operating-system functions; a ...
... system had limited structuring. The UNIX OS consists of two separable parts – Systems programs – The kernel • Consists of everything below the system-call interface and above the physical hardware • Provides the file system, CPU scheduling, memory management, and other operating-system functions; a ...
CIS 721 - Lecture 1
... • An operating system (sometimes abbreviated as “OS”) is a program that functions as a virtual machine (layer of software on top of bare hardware) and a resource manager (software that controls access to computer). • It interacts with two agencies: applications and a command language interpreter. • ...
... • An operating system (sometimes abbreviated as “OS”) is a program that functions as a virtual machine (layer of software on top of bare hardware) and a resource manager (software that controls access to computer). • It interacts with two agencies: applications and a command language interpreter. • ...
Syllabus - Marwadi University
... Study of Basic commands of Linux/UNIX. Study of Advance commands and filters of Linux/UNIX. Write a shell script to reverse a number supplied by a user. Write a shell script to find the smallest of three numbers. Write a shell script to find the largest among the 3 given numbers. Write Shell script ...
... Study of Basic commands of Linux/UNIX. Study of Advance commands and filters of Linux/UNIX. Write a shell script to reverse a number supplied by a user. Write a shell script to find the smallest of three numbers. Write a shell script to find the largest among the 3 given numbers. Write Shell script ...
Operating Systems - The College of Saint Rose
... Dual-mode operation provides a user mode and a kernel mode of operation ...
... Dual-mode operation provides a user mode and a kernel mode of operation ...
Batching processing
... Scheduler--According to some priorities or concerns, it determines which activities should be considered for execution. ...
... Scheduler--According to some priorities or concerns, it determines which activities should be considered for execution. ...
Unix hardware level
... UNIX Memory Management • UNIX system uses swapping to handle memory contention among processes. Processes are swapped out until enough memory is available. The process is either in the memory or on the disk. • Decisions regarding which processes to swap in or out are made by the scheduler process. ...
... UNIX Memory Management • UNIX system uses swapping to handle memory contention among processes. Processes are swapped out until enough memory is available. The process is either in the memory or on the disk. • Decisions regarding which processes to swap in or out are made by the scheduler process. ...
Operating Systems Operating System Component and Structure
... • Note: Sequential byte stream is only one possibility! ...
... • Note: Sequential byte stream is only one possibility! ...
COS 318: Operating Systems OS Structures and System Calls
... Jump to kernel, execute handler 0 in interrupt vector l Handler 0 sends SIGFPE to process l Kernel returns control to process l Process has outstanding signal l Did process register SIGFPE handler? l ...
... Jump to kernel, execute handler 0 in interrupt vector l Handler 0 sends SIGFPE to process l Kernel returns control to process l Process has outstanding signal l Did process register SIGFPE handler? l ...
System Calls
... System calls: The mechanism used by an application program to request service from the operating system. System calls often use a special machine code instruction which causes the processor to change mode (e.g. to "supervisor mode" or "protected mode"). This allows the OS to perform restricted actio ...
... System calls: The mechanism used by an application program to request service from the operating system. System calls often use a special machine code instruction which causes the processor to change mode (e.g. to "supervisor mode" or "protected mode"). This allows the OS to perform restricted actio ...
Introduction to Object Technology
... running on a computer The entity that can be assigned to and executed on a processor Characterized by a single sequential thread of execution, a current state, and an associated set of system ...
... running on a computer The entity that can be assigned to and executed on a processor Characterized by a single sequential thread of execution, a current state, and an associated set of system ...
CHAPTER 13: I/O SYSTEMS
... The controller clears the command-ready bit and the error bits to indicate the I/O success and clears the busy bit to indicate that it’s finished ...
... The controller clears the command-ready bit and the error bits to indicate the I/O success and clears the busy bit to indicate that it’s finished ...
Work with Files and Directories
... • In 1992, AT&T’s UNIX business was sold to Novell. Novell then turned over the UNIX to X/OPEN. The Open Group published the single UNIX Specification. • The Portable Operating System Interface (POSIX) is a set of standard operating interfaces based on UNIX. • Most UNIX vendors cooperate with The Op ...
... • In 1992, AT&T’s UNIX business was sold to Novell. Novell then turned over the UNIX to X/OPEN. The Open Group published the single UNIX Specification. • The Portable Operating System Interface (POSIX) is a set of standard operating interfaces based on UNIX. • Most UNIX vendors cooperate with The Op ...
Powerpoint source
... • There must be a system call instruction, which: – causes an exception (throws a software interrupt), which vectors to a kernel handler – passes a parameter indicating which system call to invoke – saves caller’s state (regs, mode bit) so they can be restored – OS must verify caller’s parameters (e ...
... • There must be a system call instruction, which: – causes an exception (throws a software interrupt), which vectors to a kernel handler – passes a parameter indicating which system call to invoke – saves caller’s state (regs, mode bit) so they can be restored – OS must verify caller’s parameters (e ...
Memory Management
... named collection of persistent information that can be read or written A file system supports directories, which contain files and other directories ...
... named collection of persistent information that can be read or written A file system supports directories, which contain files and other directories ...
Tutorial 1 Answers File
... *Handle output to the monitor and printer *Handle remote communications using a modem *Manage network communications, such as for a local network and the Internet *Control input/output for devices such as network interface card *Control information storage and retrieval using various types of disk * ...
... *Handle output to the monitor and printer *Handle remote communications using a modem *Manage network communications, such as for a local network and the Internet *Control input/output for devices such as network interface card *Control information storage and retrieval using various types of disk * ...