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- Non-preemptive_multitasking abstract "Non-preemptive multitasking or cooperative multitasking is a style of computer multitasking in which the operating system never initiates a context switch from a running process to another process. Instead, processes voluntarily stop their operation periodically in order to enable multiple applications to be run simultaneously. This type of multitasking is called "cooperative" because all programs must cooperate for the entire scheduling scheme to work. In this scheme, the process scheduler of an operating system is known as cooperative scheduler, having its role reduced down to starting the processes and letting them return control back to it voluntarily.Although it is rarely used in modern larger systems except for specific applications such as CICS or the JES2 subsystem, non-preemptive multitasking was the scheduling scheme for 16-bit applications employed by Microsoft Windows before Windows 95 and Windows NT, and by Mac OS before OS X. Windows 9x used non-preemptive multitasking for 16-bit legacy applications, as the PowerPC versions of Mac OS X prior to Leopard used it for classic applications. NetWare, which is a network-oriented operating system, used non-preemptive multitasking up to NetWare 6.5. Non-preemptive multitasking is still used on RISC OS systems.As a non-preemptively multitasked system relies on each process regularly giving up time to other processes on the system, one poorly designed program can consume all of the CPU time for itself, either by performing extensive calculations or by busy waiting; both would cause the whole system to hang. In a server environment, this is a hazard that makes the entire environment unacceptably fragile. However, non-preemptive multitasking allows much simpler implementation of applications because their execution is never unexpectedly interrupted by the process scheduled; for example, various functions inside the application do not need to be reentrant.In contrast, preemptive multitasking interrupts applications and gives control to other processes outside of the application's control.".
- Non-preemptive_multitasking wikiPageID "5614270".
- Non-preemptive_multitasking wikiPageLength "3359".
- Non-preemptive_multitasking wikiPageOutDegree "25".
- Non-preemptive_multitasking wikiPageRevisionID "676623296".
- Non-preemptive_multitasking wikiPageWikiLink Busy_wait.
- Non-preemptive_multitasking wikiPageWikiLink Busy_waiting.
- Non-preemptive_multitasking wikiPageWikiLink CICS.
- Non-preemptive_multitasking wikiPageWikiLink Category:Concurrent_computing.
- Non-preemptive_multitasking wikiPageWikiLink Classic_(Mac_OS_X).
- Non-preemptive_multitasking wikiPageWikiLink Classic_Environment.
- Non-preemptive_multitasking wikiPageWikiLink Computer_multitasking.
- Non-preemptive_multitasking wikiPageWikiLink Context_switch.
- Non-preemptive_multitasking wikiPageWikiLink Hang_(computing).
- Non-preemptive_multitasking wikiPageWikiLink JES2.
- Non-preemptive_multitasking wikiPageWikiLink 3.
- Non-preemptive_multitasking wikiPageWikiLink Mac_OS.
- Non-preemptive_multitasking wikiPageWikiLink Mac_OS_X_Leopard.
- Non-preemptive_multitasking wikiPageWikiLink Mac_OS_X_v10.5.
- Non-preemptive_multitasking wikiPageWikiLink Microsoft_Windows.
- Non-preemptive_multitasking wikiPageWikiLink NetWare.
- Non-preemptive_multitasking wikiPageWikiLink OS_X.
- Non-preemptive_multitasking wikiPageWikiLink Operating_system.
- Non-preemptive_multitasking wikiPageWikiLink PowerPC.
- Non-preemptive_multitasking wikiPageWikiLink Preemption_(computing).
- Non-preemptive_multitasking wikiPageWikiLink Process_(computing).
- Non-preemptive_multitasking wikiPageWikiLink Process_scheduler.
- Non-preemptive_multitasking wikiPageWikiLink RISC_OS.
- Non-preemptive_multitasking wikiPageWikiLink Reentrancy_(computing).
- Non-preemptive_multitasking wikiPageWikiLink Scheduling_(computing).
- Non-preemptive_multitasking wikiPageWikiLink Server_(computing).
- Non-preemptive_multitasking wikiPageWikiLink Subroutine.
- Non-preemptive_multitasking wikiPageWikiLink Windows_95.
- Non-preemptive_multitasking wikiPageWikiLink Windows_9x.
- Non-preemptive_multitasking wikiPageWikiLink Windows_NT.
- Non-preemptive_multitasking wikiPageWikiLinkText "Non-preemptive multitasking".
- Non-preemptive_multitasking hasPhotoCollection Non-preemptive_multitasking.
- Non-preemptive_multitasking wikiPageUsesTemplate Template:Operating-system-stub.
- Non-preemptive_multitasking wikiPageUsesTemplate Template:Reflist.
- Non-preemptive_multitasking wikiPageUsesTemplate Template:Use_mdy_dates.
- Non-preemptive_multitasking subject Category:Concurrent_computing.
- Non-preemptive_multitasking hypernym Style.
- Non-preemptive_multitasking comment "Non-preemptive multitasking or cooperative multitasking is a style of computer multitasking in which the operating system never initiates a context switch from a running process to another process. Instead, processes voluntarily stop their operation periodically in order to enable multiple applications to be run simultaneously. This type of multitasking is called "cooperative" because all programs must cooperate for the entire scheduling scheme to work.".
- Non-preemptive_multitasking label "Non-preemptive multitasking".
- Non-preemptive_multitasking sameAs چند_وظیفهای_بدون_قبضهای.
- Non-preemptive_multitasking sameAs Q16969336.
- Non-preemptive_multitasking sameAs Q16969336.
- Non-preemptive_multitasking wasDerivedFrom Non-preemptive_multitasking?oldid=676623296.
- Non-preemptive_multitasking isPrimaryTopicOf Non-preemptive_multitasking.