Difference between revisions of "Multi-tasking"
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'''Multitasking''' [[operating system]]s are a subset of operating systems - now, by far the predominant form - which allow multiple programs to run at the same time. | '''Multitasking''' [[operating system]]s are a subset of operating systems - now, by far the predominant form - which allow multiple programs to run at the same time. | ||
| − | There are two principal types: '''preemptive''' | + | There are two principal types: '''preemptive multitasking''', in which computations can be (unkownst to them) interrupted in the middle of their work to allow other computations to run, and '''cooperative multitasking''', in which a running computation has to explicitly 'give up' the machine, in order for another computation to run. |
Note that this relinquishment may be a side effect of something the computation does; e.g. it may call for some input or output, and while waiting for that to happen, some other computation may be run. | Note that this relinquishment may be a side effect of something the computation does; e.g. it may call for some input or output, and while waiting for that to happen, some other computation may be run. | ||
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Revision as of 20:33, 15 April 2018
Multitasking operating systems are a subset of operating systems - now, by far the predominant form - which allow multiple programs to run at the same time.
There are two principal types: preemptive multitasking, in which computations can be (unkownst to them) interrupted in the middle of their work to allow other computations to run, and cooperative multitasking, in which a running computation has to explicitly 'give up' the machine, in order for another computation to run.
Note that this relinquishment may be a side effect of something the computation does; e.g. it may call for some input or output, and while waiting for that to happen, some other computation may be run.
