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Related Flashcards
Related Topics
Cards In This Set
| Front | Back |
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What is long-term scheduling?
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The decision to add to the pool of
processes to be executed
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What is medium-term scheduling?
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The decision to add to the number of
processes that are partially or fully in
main memory
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What is short-term scheduling?
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The decision as to which available process will be executed by the processor
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I/O Scheduling
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The decision as to which process's pending I/O request shall be handled by an available I/O device
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How does scheduling affect the performance of the system?
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It determines which processes will wait and which will progress.
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What is the resource provided by a processor?
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Execution Time
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How is a resource allocated by a processor?
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A schedule (lame, I know.)
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What is the aim of processor scheduling?
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To assign processes to be executed by the processor over time
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What are 3 system objectives for processor scheduling?
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1) Response time
2) Throughput 3) Processor efficiency |
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What are the 5 things a scheduling functions should do?
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1) Share time fairly among processes
2) Prevent starvation of a process 3) Use the processor efficiently 4) Have low overhead 5) Prioritize processes when necessary |
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What is the 3 criteria used to decide which job to admit next by the scheduler
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1) Priority
2) Expected Execution Time 3) I/O Requirements |
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What drives the decision as to when to create a new process?
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The degree of multiprogramming
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Medium-term scheduling is part of the _______ function.
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Swapping
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For medium-term scheduling, _______ decisions are based on the need to manage the degree of multiprogramming
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Swapping-in
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Short -term scheduling is also known as the _________
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Dispatcher
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