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让我们,从头到尾,通透网络I/O模型
2022-07-06 15:35:00 【InfoQ】
内核态和用户态
- 用户空间
- 内核空间。
- 程序需要等待数据从网卡拷贝到内核空间。
- 因为用户程序无法访问内核空间,所以内核又得把数据拷贝到用户空间,这样处于用户空间的程序才能访问这个数据。
同步阻塞 I/O

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同步非阻塞 I/O

I/O 多路复用

信号驱动式I/O

异步 I/O

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