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Update p2-sched.md
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lec7/p2-sched.md

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@@ -518,7 +518,7 @@ MLFQ, Multi-Level Feedback Queue
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基本调度规则
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- 工作进入系统时,放在最高优先级(最上层队列)
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-如果进程在当前的时间片没有完成,则降到下一个优先级
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-如果进程使用完当前的时间片(没有结束),则降到下一个优先级
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- ②如果工作在其时间片以内主动释放CPU,则优先级不变
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- 时间片大小随优先级级别增加而增加
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![w:500](figs/sched-mlfq.png)

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