chapter 1 Introduction
... Could be space-multiplexed into memory and timemultiplexed in processors ...
... Could be space-multiplexed into memory and timemultiplexed in processors ...
03_shells_and_processes
... multiprogramming and multitasking – Multiprogramming systems switch the running process when that process requires I/O. – Multitasking systems periodically switch the running process after some (typically minute) period of time ...
... multiprogramming and multitasking – Multiprogramming systems switch the running process when that process requires I/O. – Multitasking systems periodically switch the running process after some (typically minute) period of time ...
Introduction to Object Technology
... scheduling priority of the process. In some systems, several values are required (e.g., default, current, highest-allowable) ••Scheduling-related information: This will depend on the scheduling algorithm used. Examples are the amount of time that the process has been waiting and the amount of time t ...
... scheduling priority of the process. In some systems, several values are required (e.g., default, current, highest-allowable) ••Scheduling-related information: This will depend on the scheduling algorithm used. Examples are the amount of time that the process has been waiting and the amount of time t ...
Operating Systems
... Process states, Process Scheduling, Process hierarchy, Threads, Threading issues, Multithreading models, Non-pre-emptive and pre-emptive scheduling algorithms, Concurrent processes, Critical section, Semaphores, methods for inter-process communication, Deadlocks. [1] Page 101 to 113, Page 115 to 122 ...
... Process states, Process Scheduling, Process hierarchy, Threads, Threading issues, Multithreading models, Non-pre-emptive and pre-emptive scheduling algorithms, Concurrent processes, Critical section, Semaphores, methods for inter-process communication, Deadlocks. [1] Page 101 to 113, Page 115 to 122 ...
csci19f2
... • When a scan begins, all new requests are in one of the queues, with the other being empty • During the scan, all new requests are put into the queue that was initially empty • Thus, service of new requests is deferred until all the old requests have been processed CS19D - Operating Systems ...
... • When a scan begins, all new requests are in one of the queues, with the other being empty • During the scan, all new requests are put into the queue that was initially empty • Thus, service of new requests is deferred until all the old requests have been processed CS19D - Operating Systems ...
Threads, SMP, and Micro
... Processes and Threads • Resource ownership - process includes a virtual address space to hold the process image • Scheduling/execution- follows an execution path that may be interleaved with other processes ...
... Processes and Threads • Resource ownership - process includes a virtual address space to hold the process image • Scheduling/execution- follows an execution path that may be interleaved with other processes ...
Kernel (computer science)
... On many systems, a program's virtual address may refer to data which is not currently in memory. The layer of indirection provided by virtual addressing allows the operating system to use other data stores, like a hard drive, to store what would otherwise have to remain in main memory (RAM). As a r ...
... On many systems, a program's virtual address may refer to data which is not currently in memory. The layer of indirection provided by virtual addressing allows the operating system to use other data stores, like a hard drive, to store what would otherwise have to remain in main memory (RAM). As a r ...
![Operating Systems [OS]](http://s1.studyres.com/store/data/003405497_1-fcdfdf12ca283ac50da021c971edcf1f-300x300.png)
Operating Systems [OS]
... I/O operations – A running program may require I/O, which may involve a file or an I/O device ...
... I/O operations – A running program may require I/O, which may involve a file or an I/O device ...
ppt
... – Interrupts enabled during execution to allow top half to continue handling other interrupts – Mutual exclusion achieved through ‘masking interrupts’ • Course granularity can unnecessarily prohibit too many other invocations ...
... – Interrupts enabled during execution to allow top half to continue handling other interrupts – Mutual exclusion achieved through ‘masking interrupts’ • Course granularity can unnecessarily prohibit too many other invocations ...
Linux-Spr-2001-sect-1-group
... – Can only be resumed by an action from another process – Used in Debugging – No corresponding state in the textbook ...
... – Can only be resumed by an action from another process – Used in Debugging – No corresponding state in the textbook ...
Chapter 5 Concurrency: Mutual Exclusion and Synchronization
... operations may be performed on a semaphore, all of which are atomic: initialize, decrement, and increment. The decrement operation may result in the blocking of a process, and the increment operation may result in the unblocking of a process. Also known as a counting semaphore or a general semaphore ...
... operations may be performed on a semaphore, all of which are atomic: initialize, decrement, and increment. The decrement operation may result in the blocking of a process, and the increment operation may result in the unblocking of a process. Also known as a counting semaphore or a general semaphore ...
Steps of porting (cont
... of system resources and could not control hardware directly user programs are working in user-space ...
... of system resources and could not control hardware directly user programs are working in user-space ...
slides - Computer Science
... Enables wimp applications to obtain isolated I/O channels to any subset of a system’s commodity devices needed during a session Enables trusted audit and control of physical devices without stopping and restarting applications, Allows unmodified commodity OSes to have unfettered access to all hardwar ...
... Enables wimp applications to obtain isolated I/O channels to any subset of a system’s commodity devices needed during a session Enables trusted audit and control of physical devices without stopping and restarting applications, Allows unmodified commodity OSes to have unfettered access to all hardwar ...
Slide 1
... Deadlock • Permanent blocking of a set of processes that either compete for system resources or communicate with each other • No efficient solution • Involve conflicting needs for resources by two or more processes ...
... Deadlock • Permanent blocking of a set of processes that either compete for system resources or communicate with each other • No efficient solution • Involve conflicting needs for resources by two or more processes ...
Network File System
... (2) A choice of contiguous or non-contiguous files on a per-file basis. Noncontiguous files result in more efficient use of available disk space, while contiguous files offer enhanced performance. (3) Compatibility with widely available storage and retrieval media. Diskettes created with VxWorks (th ...
... (2) A choice of contiguous or non-contiguous files on a per-file basis. Noncontiguous files result in more efficient use of available disk space, while contiguous files offer enhanced performance. (3) Compatibility with widely available storage and retrieval media. Diskettes created with VxWorks (th ...
No Slide Title
... The process has a virtual memory address space, information (such as a base priority), and an affinity for one or more processors. Threads are the unit of execution scheduled by the kernel’s dispatcher. Each thread has its own state, including a priority, processor affinity, and accounting informati ...
... The process has a virtual memory address space, information (such as a base priority), and an affinity for one or more processors. Threads are the unit of execution scheduled by the kernel’s dispatcher. Each thread has its own state, including a priority, processor affinity, and accounting informati ...
Lecture #3: Operating
... I/O operations - A running program may require I/O, which may involve a file or an I/O device ...
... I/O operations - A running program may require I/O, which may involve a file or an I/O device ...
NET201_Lecture3-22
... This means that, for example, a memory size of 10 MB can execute 10 programs, each of size 3 MB, for a total of 30 MB. At any moment, 10 MB of the 10 programs are in memory and 20 MB are on disk. There is therefore an actual memory size of 10 MB, but a virtual memory size of 30 MB Networks and Commu ...
... This means that, for example, a memory size of 10 MB can execute 10 programs, each of size 3 MB, for a total of 30 MB. At any moment, 10 MB of the 10 programs are in memory and 20 MB are on disk. There is therefore an actual memory size of 10 MB, but a virtual memory size of 30 MB Networks and Commu ...
Computer Network and Infrastructure
... perform its scheduling function. Typical items of information: •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, s ...
... perform its scheduling function. Typical items of information: •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, s ...
Chapter 1
... The operating systems provide this service. The user does not have to worry about secondary storage management. User gives a command for reading or writing to a file and sees his/her task accomplished. Thus operating systems make it easier for user programs to accomplish their task. This service inv ...
... The operating systems provide this service. The user does not have to worry about secondary storage management. User gives a command for reading or writing to a file and sees his/her task accomplished. Thus operating systems make it easier for user programs to accomplish their task. This service inv ...
Appendix A-Linux_cs3
... The term runlevel refers to a mode of operation in one of the computer operating systems that implement Unix System V-style initialization. Conventionally, seven (7) runlevels exist, numbered from zero to six; though up to ten, from zero to nine, may be used. S is sometimes used as a synonym for ...
... The term runlevel refers to a mode of operation in one of the computer operating systems that implement Unix System V-style initialization. Conventionally, seven (7) runlevels exist, numbered from zero to six; though up to ten, from zero to nine, may be used. S is sometimes used as a synonym for ...
The Linux System
... specify processes to the operating system when an application makes a system call to signal, modify, or wait for another process 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 Personalit ...
... specify processes to the operating system when an application makes a system call to signal, modify, or wait for another process 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 Personalit ...
Operating System Architecture
... – many programs and blocks of data must reside in main memory concurrently – the memory manager must • find and assign memory space for these needs and • ensure that the actions of each program are restricted to the program’s allotted space ...
... – many programs and blocks of data must reside in main memory concurrently – the memory manager must • find and assign memory space for these needs and • ensure that the actions of each program are restricted to the program’s allotted space ...