Selects from among the processes in memory that are ready to execute,
and allocates the CPU to one of them. CPU scheduling decisions may take
place when a process: 1.Switches from running to waiting state.
2.Switches from running to ready state. 3.Switches from waiting to
ready. 4.Terminates. Scheduling under 1 and 4 is non-preemptive. All
other scheduling is preemptive.
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Medium term scheduling is part of the swapping function. This relates to processes that are in a blocked or suspended state. They are swapped out of real-memory until they are ready to execute. The swapping-in decision is based on memory-management criteria. Short term scheduler, also know as a dispatcher executes most frequently, and makes the finest-grained decision of which process should execute next. This scheduler is invoked whenever an event occurs. It may lead to interruption of one process by preemption.
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Tuesday, May 13, 2008
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Medium term scheduling is part of the swapping function. This relates to processes that are in a blocked or suspended state. They are swapped out of real-memory until they are ready to execute. The swapping-in decision is based on memory-management criteria. Short term scheduler, also know as a dispatcher executes most frequently, and makes the finest-grained decision of which process should execute next. This scheduler is invoked whenever an event occurs. It may lead to interruption of one process by preemption.
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Tuesday, May 13, 2008
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Dispatcher module gives control of the CPU to the process selected by the short-term scheduler; this involves
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Monday, April 28, 2008
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Use Task Scheduler to schedule necessary maintenance utilities to run at specific times.
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Tuesday, April 01, 2008
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Use Task Scheduler to schedule necessary maintenance utilities to run at specific times.
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Tuesday, April 01, 2008
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