OPERATING SYSTEMS:
... We’ve completed our first overview of an Operating System – this was the equivalent of a Satellite picture. The next view will be at the level of a high flying plane. After that, we’ll be at ground level, looking at pieces in detail. ...
... We’ve completed our first overview of an Operating System – this was the equivalent of a Satellite picture. The next view will be at the level of a high flying plane. After that, we’ll be at ground level, looking at pieces in detail. ...
Operating Systems and File Management
... Boot and Recovery Disks • You can create a custom recovery CD that contains your computer’s current settings and device drivers • Norton Ghost is a product of Symantec, which also provides a more specialized recovery disk called the Symantec Recovery Disk • Certain PC manufacturers have pre-install ...
... Boot and Recovery Disks • You can create a custom recovery CD that contains your computer’s current settings and device drivers • Norton Ghost is a product of Symantec, which also provides a more specialized recovery disk called the Symantec Recovery Disk • Certain PC manufacturers have pre-install ...
IWS (Instructional Work Servers)
... good idea to “nice” it. This puts it at a slighly lower priority so that quick, interactive tasks (like checking e-mail) won’t get starved. To do “nice” a process, just do “nice”
...
... good idea to “nice” it. This puts it at a slighly lower priority so that quick, interactive tasks (like checking e-mail) won’t get starved. To do “nice” a process, just do “nice
Online access information sources and services (continued)
... Windows 95 Windows NT 4 (also for servers = multi-user) Windows 98 Windows 98 SE Windows ME Windows 2000 (also for servers = multi-user) Windows XP (also for servers = multi-user) Windows 2003 (for servers = multi-user) ...
... Windows 95 Windows NT 4 (also for servers = multi-user) Windows 98 Windows 98 SE Windows ME Windows 2000 (also for servers = multi-user) Windows XP (also for servers = multi-user) Windows 2003 (for servers = multi-user) ...
The Drama of the Interrupted CPU
... The trap handler: I’m always in RAM, and I’m loaded there at boot time along with the OS kernel. It’s my job to determine which device caused the interrupt. To do this I communicate with the interrupt controller and find out what number interrupt has been set. Each device has its own unique number. ...
... The trap handler: I’m always in RAM, and I’m loaded there at boot time along with the OS kernel. It’s my job to determine which device caused the interrupt. To do this I communicate with the interrupt controller and find out what number interrupt has been set. Each device has its own unique number. ...
Operating system
... multiple applications and other processes to run concurrently, using either cooperative multitasking or pre-emptive multitasking. Memory paging. Windows 95/98/NT uses a demand-paged virtual memory system, which is based on a flat, linear address space accessed using 32-bit addresses. The system allo ...
... multiple applications and other processes to run concurrently, using either cooperative multitasking or pre-emptive multitasking. Memory paging. Windows 95/98/NT uses a demand-paged virtual memory system, which is based on a flat, linear address space accessed using 32-bit addresses. The system allo ...
lecture 9
... to maximize CPU utilization. In a uniprocessor system, only one process may run at a time; any other processes much wait until the CPU is free and can be rescheduled. In multiprogramming, a process is executed until it must wait, typically for the completion of some I/O request. In a simple computer ...
... to maximize CPU utilization. In a uniprocessor system, only one process may run at a time; any other processes much wait until the CPU is free and can be rescheduled. In multiprogramming, a process is executed until it must wait, typically for the completion of some I/O request. In a simple computer ...
Fork() system call - IT325
... Fork() system call If a program contains a call to fork( ), the execution of the program results in the execution of two processes. One process is created to start executing the program. When the fork( ) system call is executed, another process is created. The original process is called the parent p ...
... Fork() system call If a program contains a call to fork( ), the execution of the program results in the execution of two processes. One process is created to start executing the program. When the fork( ) system call is executed, another process is created. The original process is called the parent p ...
Assignment3 - Operating Systems
... Fork() system call If a program contains a call to fork( ), the execution of the program results in the execution of two processes. One process is created to start executing the program. When the fork( ) system call is executed, another process is created. The original process is called the parent p ...
... Fork() system call If a program contains a call to fork( ), the execution of the program results in the execution of two processes. One process is created to start executing the program. When the fork( ) system call is executed, another process is created. The original process is called the parent p ...
Based on the above, how many processes are created by
... Fork() system call If a program contains a call to fork( ), the execution of the program results in the execution of two processes. One process is created to start executing the program. When the fork( ) system call is executed, another process is created. The original process is called the parent p ...
... Fork() system call If a program contains a call to fork( ), the execution of the program results in the execution of two processes. One process is created to start executing the program. When the fork( ) system call is executed, another process is created. The original process is called the parent p ...
Interprocess Communication (IPC)
... – Needs concurrency control (leads to data inconsistencies like ‘Lost update’) – Lack of data protection from Operating System (OS) ...
... – Needs concurrency control (leads to data inconsistencies like ‘Lost update’) – Lack of data protection from Operating System (OS) ...
Processes
... • A Process is often defined as a program in execution. To execute a program, an operating system creates a number of virtual processors, each one for running a different program. To keep track of these virtual processors, the operating system has a process table, containing entries to store CPU reg ...
... • A Process is often defined as a program in execution. To execute a program, an operating system creates a number of virtual processors, each one for running a different program. To keep track of these virtual processors, the operating system has a process table, containing entries to store CPU reg ...
CHAPTER 1: Computer Systems
... Support batch data processing operations Consist of clusters made up of multiprocessor units ...
... Support batch data processing operations Consist of clusters made up of multiprocessor units ...
AIX is building momentum as the leading, UNIX operating system for
... A file system is a hierarchical structure (file tree) of files and directories. This type of structure resembles an inverted tree with the roots at the top and branches at the bottom. This file tree uses directories to organize data and programs into groups, allowing the management of several direct ...
... A file system is a hierarchical structure (file tree) of files and directories. This type of structure resembles an inverted tree with the roots at the top and branches at the bottom. This file tree uses directories to organize data and programs into groups, allowing the management of several direct ...
Embedded Operating Systems for Real
... Windows are the popular GUIs. Four types of Operating systems, based on the kind of applications they support are: i) Single-user, single task - This operating system is designed to manage the computer so that one user can effectively do one thing at a time. The Palm OS for Palm hand-held computers ...
... Windows are the popular GUIs. Four types of Operating systems, based on the kind of applications they support are: i) Single-user, single task - This operating system is designed to manage the computer so that one user can effectively do one thing at a time. The Palm OS for Palm hand-held computers ...
Scheduling
... • Weighted Round Robin - each process is given some number of time slices, not just one per round • this is a way to provide preferences or priorities even with preemptive time slicing ...
... • Weighted Round Robin - each process is given some number of time slices, not just one per round • this is a way to provide preferences or priorities even with preemptive time slicing ...
Into to Linux Part 1-4
... – Linux uses the notion of < and > for redirection of input and output respectively. – A redirection using > allows the user to save the output to a file for example. In the same way > redirects output, < redirects input from for example the keyboard to a file for ...
... – Linux uses the notion of < and > for redirection of input and output respectively. – A redirection using > allows the user to save the output to a file for example. In the same way > redirects output, < redirects input from for example the keyboard to a file for ...
Ceng 334 - Operating Systems
... • Nice is a value between –20 to 20 (default 0). Nice system call can be used to set this value 0-20 • Base is a system parameter in UNIX source code • The scheduler forces CPU bound (on positive queues) get any service that is left over when all I/O bound and interactive processes are blocked Ceng ...
... • Nice is a value between –20 to 20 (default 0). Nice system call can be used to set this value 0-20 • Base is a system parameter in UNIX source code • The scheduler forces CPU bound (on positive queues) get any service that is left over when all I/O bound and interactive processes are blocked Ceng ...
Patterns for Operating Systems Access Control
... must also protect itself because compromise would give access to all the data in its files. A weak operating system would allow hackers access not only to data in the operating system files but data in database systems that use the services of the operating system. The operating system performs this ...
... must also protect itself because compromise would give access to all the data in its files. A weak operating system would allow hackers access not only to data in the operating system files but data in database systems that use the services of the operating system. The operating system performs this ...
Computer Network and Infrastructure
... •Process state: defines the readiness of the process to be scheduled for execution (e.g., running, ready, waiting, halted). •Priority: One or more fields may be used to describe the scheduling priority of the process. In some systems, several values are required (e.g., default, current, highest-all ...
... •Process state: defines the readiness of the process to be scheduled for execution (e.g., running, ready, waiting, halted). •Priority: One or more fields may be used to describe the scheduling priority of the process. In some systems, several values are required (e.g., default, current, highest-all ...
The concept of operating system
... Parameters stored in a block, or table, in memory, and address of block passed as a parameter in a register (e.g., Linux and Solaris) Parameters placed, or pushed, onto the stack by the program and popped off the stack by the operating system Block and stack methods do not limit the number or le ...
... Parameters stored in a block, or table, in memory, and address of block passed as a parameter in a register (e.g., Linux and Solaris) Parameters placed, or pushed, onto the stack by the program and popped off the stack by the operating system Block and stack methods do not limit the number or le ...
03-os-design
... UNIX was conventionally a monolithic design. Linux started as a monolithic kernel but with the increasing use of modules, the kernel can be made smaller and less monolithic ...
... UNIX was conventionally a monolithic design. Linux started as a monolithic kernel but with the increasing use of modules, the kernel can be made smaller and less monolithic ...