✏更新 NIO

0xcaffebabe · Jul 31, 2020 · 0e88822 · 0e88822
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diff --git a/编程语言/JAVA/高级/NIO.md b/编程语言/JAVA/高级/NIO.md
@@ -180,4 +180,22 @@ while (true) {
         iterator.remove();
     }
 }
-```
+```
+
+## 系统层面的NIO
+
+BIO模型
+
+![批注 2020-06-18 143426](/assets/批注%202020-06-18%20143426.png)
+
+同步非阻塞 NIO 
+
+![批注 2020-06-18 143440](/assets/批注%202020-06-18%20143440.png)
+
+在用户空间对fd轮询 需要在内核与用户空间之间拷贝fd
+
+![批注 2020-06-18 143959](/assets/批注%202020-06-18%20143959.png)
+
+多路复用 无需再拷贝fd
+
+![批注 2020-06-18 144854](/assets/批注%202020-06-18%20144854.png)
diff --git a/计算机系统/程序间的交互和通信/系统级IO.md b/计算机系统/程序间的交互和通信/系统级IO.md
@@ -63,13 +63,3 @@ int dup2(int ofd,int nfd);
 ```
 
 ![](https://images.cnblogs.com/cnblogs_com/mydomain/201107/201107032229433652.png)
-
-## NIO
-
-![批注 2020-06-18 143426](/assets/批注%202020-06-18%20143426.png)
-
-![批注 2020-06-18 143440](/assets/批注%202020-06-18%20143440.png)
-
-![批注 2020-06-18 143959](/assets/批注%202020-06-18%20143959.png)
-
-![批注 2020-06-18 144854](/assets/批注%202020-06-18%20144854.png)