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1. The Free On-line Dictionary of Computing (30 December 2018) |
multitasking
concurrency
concurrent processing
multiprogramming
process scheduling
(Or "multi-tasking", "multiprogramming",
"concurrent processing", "concurrency", "process scheduling")
A technique used in an operating system for sharing a single
processor between several independent jobs. The first
multitasking operating systems were designed in the early
1960s.
Under "cooperative multitasking" the running task decides
when to give up the CPU and under "pre-emptive multitasking"
(probably more common) a system process called the
"scheduler" suspends the currently running task after it has
run for a fixed period known as a "time-slice". In both
cases the scheduler is responsible for selecting the next task
to run and (re)starting it.
The running task may relinquish control voluntarily even in a
pre-emptive system if it is waiting for some external event.
In either system a task may be suspended prematurely if a
hardware interrupt occurs, especially if a higher priority
task was waiting for this event and has therefore become
runnable.
The scheduling algorithm used by the scheduler determines
which task will run next. Some common examples are
round-robin scheduling, priority scheduling, shortest job
first and guaranteed scheduling.
Multitasking introduces overheads because the processor
spends some time in choosing the next job to run and in saving
and restoring tasks' state, but it reduces the worst-case time
from job submission to completion compared with a simple
batch system where each job must finish before the next one
starts. Multitasking also means that while one task is
waiting for some external event, the CPU to do useful work
on other tasks.
A multitasking operating system should provide some degree of
protection of one task from another to prevent tasks from
interacting in unexpected ways such as accidentally modifying
the contents of each other's memory areas.
The jobs in a multitasking system may belong to one or many
users. This is distinct from parallel processing where one
user runs several tasks on several processors. Time-sharing
is almost synonymous but implies that there is more than one
user.
Multithreading is a kind of multitasking with low
overheads and no protection of tasks from each other, all
threads share the same memory.
(1998-04-24)
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Common Misspellings > |
multitasking umultitasking umltitasking mumltitasking ultitasking mmultitasking mlutitasking mulutitasking mltitasking muultitasking mutlitasking multlitasking mutitasking mulltitasking mulittasking multittasking mulitasking multtitasking multtiasking multitiasking multtasking multiitasking multiatsking multitatsking multiasking multittasking multitsaking multitasaking multitsking multitaasking multitaksing multitasksing multitaking multitassking multitasikng multitaskikng multitasing multitaskking multitasknig multitaskinig multitaskng multitaskiing multitaskign multitaskingn multitaskig multitaskinng multitaskigng multitaskin multitaskingg jultitasking mjultitasking jmultitasking kultitasking mkultitasking kmultitasking lultitasking mlultitasking lmultitasking nultitasking mnultitasking nmultitasking ultitasking m ultitasking multitasking m7ltitasking mu7ltitasking m7ultitasking m<itasking mu<itasking m&ultitasking m8ltitasking mu8ltitasking m8ultitasking myltitasking muyltitasking myultitasking miltitasking muiltitasking miultitasking mhltitasking muhltitasking mhultitasking mjltitasking mujltitasking mjultitasking mkltitasking mukltitasking mkultitasking maltitasking meltitasking moltitasking muititasking mulititasking muiltitasking muotitasking mulotitasking muoltitasking muptitasking mulptitasking mupltitasking muktitasking mulktitasking mukltitasking mu,titasking mul,titasking mu,ltitasking mu.titasking mul.titasking mu.ltitasking mul5itasking mult5itasking mul5titasking mul%itasking mult%itasking mul%titasking mul6itasking mult6itasking mul6titasking mulritasking multritasking mulrtitasking mulyitasking multyitasking mulytitasking mulfitasking multfitasking mulftitasking mulgitasking multgitasking mulgtitasking mulhitasking multhitasking mulhtitasking mult8tasking multi8tasking mult8itasking mult*tasking multi*tasking mult*itasking mult9tasking multi9tasking mult9itasking multutasking multiutasking multuitasking multotasking multiotasking multoitasking multjtasking multijtasking multjitasking multktasking multiktasking multkitasking multltasking multiltasking multlitasking multatasking multetasking multi5asking multit5asking multi5tasking multi%asking multit%asking multi%tasking multi6asking multit6asking multi6tasking multirasking multitrasking multirtasking multiyasking multityasking multiytasking multifasking multitfasking multiftasking multigasking multitgasking multigtasking multihasking multithasking multihtasking multitqsking multitaqsking multitqasking multitwsking multitawsking multitwasking multitssking multitassking multitsasking multitxsking multitaxsking multitxasking multitzsking multitazsking multitzasking multit sking multita sking multit asking multitesking multitisking multitosking multitusking multitaqking multitasqking multitaqsking multitawking multitaswking multitawsking multitaeking multitaseking multitaesking multitaaking multitasaking multitaasking multitadking multitasdking multitadsking multitazking multitaszking multitazsking multitaxking multitasxking multitaxsking multitacking multitascking multitacsking multita king multitas king multita sking multitasuing multitaskuing multitasuking multitasiing multitaskiing multitasiking multitasoing multitaskoing multitasoking multitasjing multitaskjing multitasjking multitasling multitaskling multitaslking multitasming multitaskming multitasmking multitas,ing multitask,ing multitas,king multitas.ing multitask.ing multitas.king multitask8ng multitaski8ng multitask8ing multitask*ng multitaski*ng multitask*ing multitask9ng multitaski9ng multitask9ing multitaskung multitaskiung multitaskuing multitaskong multitaskiong multitaskoing multitaskjng multitaskijng multitaskjing multitaskkng multitaskikng multitaskking multitasklng multitaskilng multitaskling multitaskang multitaskeng multitaskigg multitaskingg multitaskigng multitaskihg multitaskinhg multitaskihng multitaskijg multitaskinjg multitaskijng multitaskibg multitaskinbg multitaskibng multitaskimg multitaskinmg multitaskimng multitaski g multitaskin g multitaski ng multitaskinr multitaskingr multitaskinrg multitaskint multitaskingt multitaskintg multitaskiny multitaskingy multitaskinyg multitaskinf multitaskingf multitaskinfg multitaskinh multitaskingh multitaskinhg multitaskinv multitaskingv multitaskinvg multitaskinb multitaskingb multitaskinbg multitaskinn multitaskingn multitaskinng multitaskin multitasking multitaskin g Definition commonly spelled as: Defanition or Defenition, Synonym as: Synonim, Sinonym or Sinonim, Thesaurus as: Thesorus or Thesauris, Dictionary as: Dictionery or Dictionry and Define is usually not misspelled. What does mispell meen? It Meens...
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