CHAP10
... – Assign idle processors – New arrivals may be assigned to a processor that is used by a job currently using more than one processor – Hold request until processor is available – New arrivals will be given a processor before existing running applications ...
... – Assign idle processors – New arrivals may be assigned to a processor that is used by a job currently using more than one processor – Hold request until processor is available – New arrivals will be given a processor before existing running applications ...
... Of course, not all applications need customized resource management. Instead of communicating with the exokernel directly, we expect most programs to be linked with libraries that hide lowlevel resources behind traditional operating system abstractions. However, unlike traditional implementations of ...
Document
... The main mode of access to a UNIX machine is through a terminal, which usually includes a keyboard, and a video monitor. For each terminal connected to the UNIX system, the kernel runs a process called a tty that accepts input from the terminal, and sends output to the terminal. Tty processes are ge ...
... The main mode of access to a UNIX machine is through a terminal, which usually includes a keyboard, and a video monitor. For each terminal connected to the UNIX system, the kernel runs a process called a tty that accepts input from the terminal, and sends output to the terminal. Tty processes are ge ...
COS 318: Operating Systems Virtual Machine Monitors Kai Li and Andy Bavier
... ESX Server – Memory Virtualization Maintains shadow page tables with virtual to machine address mappings. u Shadow page tables are used by the physical processor u ESX maintains the pmap data structure for each VM with “physical” to machine address mappings u ESX can easily remap a machine pa ...
... ESX Server – Memory Virtualization Maintains shadow page tables with virtual to machine address mappings. u Shadow page tables are used by the physical processor u ESX maintains the pmap data structure for each VM with “physical” to machine address mappings u ESX can easily remap a machine pa ...
ch21
... The variable class contains threads having priorities from 0 to 15. Characteristics of 2000’s priority strategy. Trends to give very good response times to interactive threads that are using the mouse and windows. Enables I/O-bound threads to keep the I/O devices busy. Complete-bound threa ...
... The variable class contains threads having priorities from 0 to 15. Characteristics of 2000’s priority strategy. Trends to give very good response times to interactive threads that are using the mouse and windows. Enables I/O-bound threads to keep the I/O devices busy. Complete-bound threa ...
Windows 2000
... The variable class contains threads having priorities from 0 to 15. Characteristics of 2000’s priority strategy. Trends to give very good response times to interactive threads that are using the mouse and windows. Enables I/O-bound threads to keep the I/O devices busy. Complete-bound threa ...
... The variable class contains threads having priorities from 0 to 15. Characteristics of 2000’s priority strategy. Trends to give very good response times to interactive threads that are using the mouse and windows. Enables I/O-bound threads to keep the I/O devices busy. Complete-bound threa ...
lecture2
... Security – defense of the system against internal and external attacks Huge range of attacks: denial-of-service (using all resources and keeping legitimate users out of the system), worms, viruses, identity theft, theft of service (unauthorized use of a system) On some systems an OS function, ...
... Security – defense of the system against internal and external attacks Huge range of attacks: denial-of-service (using all resources and keeping legitimate users out of the system), worms, viruses, identity theft, theft of service (unauthorized use of a system) On some systems an OS function, ...
Chapter 9 Linux Installation Procedures
... • A typical Linux Kernel version might look something like Linux ...
... • A typical Linux Kernel version might look something like Linux ...
Operating Systems
... modern computer operating systems. Its evolution in analyzing problems of synchronization, deadlock, and scheduling in operating systems has been a major intellectual contribution of computer science. ...
... modern computer operating systems. Its evolution in analyzing problems of synchronization, deadlock, and scheduling in operating systems has been a major intellectual contribution of computer science. ...
Cosc513-11 operating systems LINUX
... and control various aspects of your system, and is capable of handling a wide range of programs and tasks. More information on Linuxconf, including its status, most recent release, and more can be found at the Linuxconf Project homepage: ...
... and control various aspects of your system, and is capable of handling a wide range of programs and tasks. More information on Linuxconf, including its status, most recent release, and more can be found at the Linuxconf Project homepage: ...
Spooling
... again and also it quickly faults again, and again. This process continues to fault, replacing pages for which it then faults and bring back in right away. This high paging is called thrashing. A process is thrashing if it is spending more time paging than executing. Thrashing results in severe perfo ...
... again and also it quickly faults again, and again. This process continues to fault, replacing pages for which it then faults and bring back in right away. This high paging is called thrashing. A process is thrashing if it is spending more time paging than executing. Thrashing results in severe perfo ...
Notes - CSE Labs User Home Pages
... What is the average wait time for a set of processes? How about CPU utilization? Convoy effect: ...
... What is the average wait time for a set of processes? How about CPU utilization? Convoy effect: ...
linux: a product of the internet
... inexpensive operating system that runs on PCs, based on the Berkeley Software Distribution. BSDI is an unusual company in that its employees are distributed over a wide geographic area; they interact electronically over the network. Two variations of BSD UNIX, NetBSD and FreeBSD, have been rewritte ...
... inexpensive operating system that runs on PCs, based on the Berkeley Software Distribution. BSDI is an unusual company in that its employees are distributed over a wide geographic area; they interact electronically over the network. Two variations of BSD UNIX, NetBSD and FreeBSD, have been rewritte ...
Operating Systems, 6th ed. Test Bank Chapter 4 Page 1 of 15
... 32. T / F – All deadlocks involve conflicting needs for resources by two or more processes. 33. T / F – A reusable resource is one that can be safely used by only one process at a time and is not depleted by that use. 34. T / F – A consumable resource is one that can be safely used by only one proce ...
... 32. T / F – All deadlocks involve conflicting needs for resources by two or more processes. 33. T / F – A reusable resource is one that can be safely used by only one process at a time and is not depleted by that use. 34. T / F – A consumable resource is one that can be safely used by only one proce ...
PowerPoint
... z Some synchronization methods are needed for threads accessing shared data, because if a thread modifies a global variable in a process, the changes are visible to other threads in the same process. ...
... z Some synchronization methods are needed for threads accessing shared data, because if a thread modifies a global variable in a process, the changes are visible to other threads in the same process. ...
Plan 9 from Bell Labs
... acid, and others displace the better-known UNIX tools with similar jobs. Finally, about half the commands are new. Compatibility was not a requirement for the system. Where the old commands or notation seemed good enough, we kept them. When they didnt, we replaced them. The File Server A central fi ...
... acid, and others displace the better-known UNIX tools with similar jobs. Finally, about half the commands are new. Compatibility was not a requirement for the system. Where the old commands or notation seemed good enough, we kept them. When they didnt, we replaced them. The File Server A central fi ...
Chapter 16 PowerPoint
... Early versions presented a graphical user interface (GUI) for MS-DOS. Microsoft Windows 3.11 was the last 16-bit OS and the most well known version. Microsoft Windows 95 was the first 32-bit version. All applications designed for Windows have standard interfaces. Multitasking allows users to have mo ...
... Early versions presented a graphical user interface (GUI) for MS-DOS. Microsoft Windows 3.11 was the last 16-bit OS and the most well known version. Microsoft Windows 95 was the first 32-bit version. All applications designed for Windows have standard interfaces. Multitasking allows users to have mo ...
2-Operating-System Structures
... File-system manipulation - The file system is of particular interest. Programs need to read and write files and directories, create and delete them, search them, list file Information, permission management. ...
... File-system manipulation - The file system is of particular interest. Programs need to read and write files and directories, create and delete them, search them, list file Information, permission management. ...
Implementing Processes, Threads, and Resources
... OS Mechanisms to Handle Performance and Exclusive use of resources •Processor Modes - hardware mode bit is used to distinguish between OS and user instructions •Kernels - most critical part of OS placed in kernel (trusted software module) •Method of invoking system service - calling a system functio ...
... OS Mechanisms to Handle Performance and Exclusive use of resources •Processor Modes - hardware mode bit is used to distinguish between OS and user instructions •Kernels - most critical part of OS placed in kernel (trusted software module) •Method of invoking system service - calling a system functio ...
Najwa Knefati CH3 summary
... communicate and to synchronize their actions without sharing the same address space. *useful (easier to implement) in a distributed environment, where the communicating processes may reside on different computers connected by a network. A message-passing facility provides at least two operations: se ...
... communicate and to synchronize their actions without sharing the same address space. *useful (easier to implement) in a distributed environment, where the communicating processes may reside on different computers connected by a network. A message-passing facility provides at least two operations: se ...
15.a The Internal Operating System
... programs to be executed Deciding which process shall be executed next by the processor Swapping processes Deciding which process’s pending I/O request shall be handled by an available I/O device ...
... programs to be executed Deciding which process shall be executed next by the processor Swapping processes Deciding which process’s pending I/O request shall be handled by an available I/O device ...
Chapter 09: Uniprocessor Scheduling
... to the system for processing – May be first-come-first-served – Or according to criteria such as priority, I/O requirements or expected execution time ...
... to the system for processing – May be first-come-first-served – Or according to criteria such as priority, I/O requirements or expected execution time ...