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multitasking    音标拼音: [m'ʌltit,æskɪŋ]
多任务,多任务化

多任务,多任务化

multitasking
多重任务;多重作业;多任务;多(重)任务处理 MT

multi-tasking
多任务


multitasking
多任务

(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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  • Multitasking, Productivity, and Brain Health - Verywell Mind
    Multitasking involves working on two or more tasks simultaneously, switching back and forth from one thing to another, or performing a number of tasks in rapid succession
  • Human multitasking - Wikipedia
    Human multitasking is the concept that one can split their attention on more than one task or activity at the same time, such as speaking on the phone while driving a car
  • Multitasking: Switching costs
    Doing more than one task at a time, especially more than one complex task, takes a toll on productivity Although that shouldn't surprise anyone who has talked on the phone while checking E-mail or talked on a cell phone while driving, the extent of the problem might come as a shock
  • Is Multitasking Real? What Psychology Tells Us
    Over the past few decades, researchers have explored what actually happens in the brain when we attempt to do multiple things simultaneously The findings have been remarkably consistent: true multitasking, as most people understand it, does not really exist
  • MULTITASKING Definition Meaning - Merriam-Webster
    The meaning of MULTITASKING is the concurrent performance of several jobs by a computer How to use multitasking in a sentence
  • Is It Possible to Multitask? What Science Says - Biology Insights
    True multitasking is largely a myth Science shows your brain switches rapidly between tasks, and that constant switching comes with real cognitive costs
  • Multitasking | Definition Facts | Britannica
    Multitasking, the running of multiple programs (sets of instructions) in one computer at the same time Multitasking is used to keep all of a computer’s resources at work as much of the time as possible
  • Multitasking - an overview | ScienceDirect Topics
    The diversity of everyday multitasking situations and the complexity of the interactions among the individual, the task requirements and the contextual factors that can affect performance make predicting multitasking outcomes difficult
  • The Science Behind Multitasking and Its Effect on Brain Efficiency
    Multitasking is a common practice in today’s fast-paced world, where people often juggle multiple tasks simultaneously Many believe that multitasking can boost productivity, but recent scientific studies suggest otherwise Understanding how multitasking affects the brain is crucial for improving efficiency and maintaining mental health
  • The Science of Multitasking: Myths and Realities - Mindnix
    Discover the science of multitasking, debunk common myths, and learn how focusing on one task at a time can boost your productivity and brainpower





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