What is a Process? Answer 1: a process is an abstraction of a
... • multiprogramming means having multiple processes existing at the same time • most modern, general purpose operating systems support multiprogramming • all processes share the available hardware resources, with the sharing coordinated by the operating system: – Each process uses some of the availab ...
... • multiprogramming means having multiple processes existing at the same time • most modern, general purpose operating systems support multiprogramming • all processes share the available hardware resources, with the sharing coordinated by the operating system: – Each process uses some of the availab ...
Convergence of Desktop and Web Applications on a Multi-Service OS
... Web applications and traditional desktop applications have two fundamental differences: trust model and crossprincipal application composition. These differences reveal limitations of existing operating systems in supporting our converged application scenario. We discuss these differences and limita ...
... Web applications and traditional desktop applications have two fundamental differences: trust model and crossprincipal application composition. These differences reveal limitations of existing operating systems in supporting our converged application scenario. We discuss these differences and limita ...
Slide 1
... Answer A for True and B for False 041200 A file specification is also called a path. 041300 Windows Explorer is a file management utility. 041400 Disks are formatted into tracks and sectors. 041500 Time Machine is synchronization software used for backup on Macs. 041600 To repopulate a new ...
... Answer A for True and B for False 041200 A file specification is also called a path. 041300 Windows Explorer is a file management utility. 041400 Disks are formatted into tracks and sectors. 041500 Time Machine is synchronization software used for backup on Macs. 041600 To repopulate a new ...
2.01 - Suan Dusit Rajabhat University
... Originally, NT was supposed to use the OS/2 API as its native ...
... Originally, NT was supposed to use the OS/2 API as its native ...
The Linux System
... Credentials. Each process must have an associated user ID and one or more group IDs that determine the process’s rights to access system resources and files Personality. Not traditionally found on UNIX systems, but under Linux each process has an associated personality identifier that can slight ...
... Credentials. Each process must have an associated user ID and one or more group IDs that determine the process’s rights to access system resources and files Personality. Not traditionally found on UNIX systems, but under Linux each process has an associated personality identifier that can slight ...
CAAM 420 Fall 2012 Lecture 02
... VirtualBox is an open source software that runs on Windows, Linux, Macintosh and Solaris hosts and supports a large number of guest operating systems(OS) (https://www.virtualbox.org). The major advantage of the VirtualBox is that it lets us run more than one operating system at the same time, this w ...
... VirtualBox is an open source software that runs on Windows, Linux, Macintosh and Solaris hosts and supports a large number of guest operating systems(OS) (https://www.virtualbox.org). The major advantage of the VirtualBox is that it lets us run more than one operating system at the same time, this w ...
Introduction to Object Technology
... • thread switching does not require kernel mode privileges because all of the thread management structures are within the user address space of a single ...
... • thread switching does not require kernel mode privileges because all of the thread management structures are within the user address space of a single ...
Dealing with Meory Constraints under SAS 6.04 for DOS and Moving to 6.06 under OS/2
... than the DOS File Allocation Table system (Abbreviated FAT, this is the type of file system DOS uses exclusively. It was created for 360K and lSOK diskettes over a decade ago). OS/2 can also read data from, and even be based on a FAT volume, but the HPFS is superior. Future releases of SAS for OS/2 ...
... than the DOS File Allocation Table system (Abbreviated FAT, this is the type of file system DOS uses exclusively. It was created for 360K and lSOK diskettes over a decade ago). OS/2 can also read data from, and even be based on a FAT volume, but the HPFS is superior. Future releases of SAS for OS/2 ...
Providing a Single System Image
... • All systems but MOSIX, Kerrighed, GENESIS are based on middleware • The solutions are performance driven – little work has been done on making them application developer friendly by providing SSI • MOSIX, Kerrighed, GENESIS are offering many services that form a SSI ...
... • All systems but MOSIX, Kerrighed, GENESIS are based on middleware • The solutions are performance driven – little work has been done on making them application developer friendly by providing SSI • MOSIX, Kerrighed, GENESIS are offering many services that form a SSI ...
Operating Systems
... • Microkernel implementation sometimes tricky: need to worry about concurrency and synchronisation. • Microkernels often end up with redundant copies of OS data structures. Hence today most common operating systems blur the distinction between kernel and microkernel. • e.g. linux is a “kernel”, but ...
... • Microkernel implementation sometimes tricky: need to worry about concurrency and synchronisation. • Microkernels often end up with redundant copies of OS data structures. Hence today most common operating systems blur the distinction between kernel and microkernel. • e.g. linux is a “kernel”, but ...
Device controllers
... ■ Log error and related information in system error logs ■ System must handle error gracefully (if can) ■ Good OSs will provide enough information to debug and ...
... ■ Log error and related information in system error logs ■ System must handle error gracefully (if can) ■ Good OSs will provide enough information to debug and ...
Operating Systems
... 1.7 Operating System Structure Monolithic system (单体系统): The structure is that there is no structure. The OS is written as a collection of procedures, each of which can call any of the other ones whenever it needs to. ...
... 1.7 Operating System Structure Monolithic system (单体系统): The structure is that there is no structure. The OS is written as a collection of procedures, each of which can call any of the other ones whenever it needs to. ...
O ti S t O ti S t Operating Systems Chapter 1
... between user programs and the hardware of the computer on which they r n The operating ssystem run. stem is responsible for allo allowing ing reso resources rces (s (such ch as processors, disks or networks) to be shared, providing common services needed by many different programs (e.g., file servic ...
... between user programs and the hardware of the computer on which they r n The operating ssystem run. stem is responsible for allo allowing ing reso resources rces (s (such ch as processors, disks or networks) to be shared, providing common services needed by many different programs (e.g., file servic ...
Lecture 1: Course Introduction and Overview
... • No universally accepted definition • “Everything a vendor ships when you order an operating system” is good approximation – But varies wildly ...
... • No universally accepted definition • “Everything a vendor ships when you order an operating system” is good approximation – But varies wildly ...
Advanced Operating Systems: Review of Operating System Concepts
... • RAID within a storage array can still fail if the array fails, so automatic replication of the data between arrays is common • Frequently, a small number of hot-spare disks are left unallocated, automatically replacing a failed disk and having data rebuilt onto them Review of Operating System Conc ...
... • RAID within a storage array can still fail if the array fails, so automatic replication of the data between arrays is common • Frequently, a small number of hot-spare disks are left unallocated, automatically replacing a failed disk and having data rebuilt onto them Review of Operating System Conc ...
Using Linux Kernel Modules For Operating Systems Class Projects
... of a special file. Special device driver files are an example of a file which can be used to invoke kernel module code. Another example of files that can invoke kernel module code when read are the files under the /proc directory. Linux maintains a file system (/proc) of files which when read will r ...
... of a special file. Special device driver files are an example of a file which can be used to invoke kernel module code. Another example of files that can invoke kernel module code when read are the files under the /proc directory. Linux maintains a file system (/proc) of files which when read will r ...
Silberschatz, Galvin and Gagne ©2009 Operating System Concepts
... User process may accidentally or purposefully attempt to disrupt normal operation via illegal I/O instructions ...
... User process may accidentally or purposefully attempt to disrupt normal operation via illegal I/O instructions ...
AIM COLLEGE-HISAR What is an Operating System?
... One way that operating-system designers reduce the chance of thrashing is by reducing the need for new processes to perform various tasks. Some operating systems allow for a "process-lite," called a thread, that can deal with all the CPU-intensive work of a normal process, but generally does not dea ...
... One way that operating-system designers reduce the chance of thrashing is by reducing the need for new processes to perform various tasks. Some operating systems allow for a "process-lite," called a thread, that can deal with all the CPU-intensive work of a normal process, but generally does not dea ...
Lecture 15 - Department of Math and Computer Science
... 1. Normal kernel code is nonpreemptible (until 2.6) – when a time interrupt is received while a process is executing a kernel system service routine, the kernel’s need_resched flag is set so that the scheduler will run once the system call has completed and control is about to be returned to user mo ...
... 1. Normal kernel code is nonpreemptible (until 2.6) – when a time interrupt is received while a process is executing a kernel system service routine, the kernel’s need_resched flag is set so that the scheduler will run once the system call has completed and control is about to be returned to user mo ...
1.1. The UNIX Operating System
... to develop an ambitious multi-user, multi-tasking OS for mainframe computers known as MULTICS (Multiplexed Information and Computing System). MULTICS failed, but it did inspire Ken Thompson, who was a researcher at Bell Labs, to have a go at writing a simpler operating system himself. He wrote a sim ...
... to develop an ambitious multi-user, multi-tasking OS for mainframe computers known as MULTICS (Multiplexed Information and Computing System). MULTICS failed, but it did inspire Ken Thompson, who was a researcher at Bell Labs, to have a go at writing a simpler operating system himself. He wrote a sim ...
Slide 1
... C. Linux and Mac OS have a reputation for being more stable than Windows. D. Windows includes software called Boot Camp that allows PCs to boot into different operating systems, such as Mac OS, Linux, Chrome, and Android. ...
... C. Linux and Mac OS have a reputation for being more stable than Windows. D. Windows includes software called Boot Camp that allows PCs to boot into different operating systems, such as Mac OS, Linux, Chrome, and Android. ...
FileSystems
... Can simulate last two with first method by inserting appropriate control characters. Need at least executable binary and data Type indicated by “type” extension Resource fork (Mac) Magic number (UNIX) More complexity requires more OS support ...
... Can simulate last two with first method by inserting appropriate control characters. Need at least executable binary and data Type indicated by “type” extension Resource fork (Mac) Magic number (UNIX) More complexity requires more OS support ...
Nachos Overview - Computer and Information Science | Brooklyn
... Nachos has an excellent balance between simplicity and realism. On the one hand, Nachos runs as a UNIX process instead of directly on bare hardware. Thus much tedious code dealing with real I/O devices is unnecessary keeping Nachos small enough; it is also easier for students to do experiments since ...
... Nachos has an excellent balance between simplicity and realism. On the one hand, Nachos runs as a UNIX process instead of directly on bare hardware. Thus much tedious code dealing with real I/O devices is unnecessary keeping Nachos small enough; it is also easier for students to do experiments since ...