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                            [TOC]

## IO設備的緩沖區
- 減少CPU處理O請求的頻率
- 提高CPU與O設備之間的并行性

![E0B295FE-2526-4799-94B2-FCCB57EC765B.png](http://img04.sogoucdn.com/app/a/100520146/52db27abb21360fb1b40322ee80b0cb0)

- 專用緩沖區只適用于特定的|O進程
- 當這樣的O進程比較多時,對內存的消耗也很大
- 操作系統劃出可供多個進程使用的公共緩沖區,稱之為**緩沖池**

![01F52050-AFB7-4D68-8A84-3781EDFC5E9A.png](http://img04.sogoucdn.com/app/a/100520146/aca44e646efc5bf0d4c9be501f27c0d6)
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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