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```
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<div align="center"> <img src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/eb859228-c0f2-4bce-910d-d9f76929352b.png"/> </div><br>
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## 3. 最近未使用
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> NRU, Not Recently Used
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NRU 优先换出已经被修改的脏页面(R=0,M=1),而不是被频繁使用的干净页面(R=1,M=0)。
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## 4. 先进先出
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## 4. 先进先出
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> FIFO, First In First Out
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@ -73,6 +73,7 @@
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```
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<div align="center"> <img src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/eb859228-c0f2-4bce-910d-d9f76929352b.png"/> </div><br>
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## 3. 最近未使用
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> NRU, Not Recently Used
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@ -88,7 +89,7 @@
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NRU 优先换出已经被修改的脏页面(R=0,M=1),而不是被频繁使用的干净页面(R=1,M=0)。
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## 4. 先进先出
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## 4. 先进先出
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> FIFO, First In First Out
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