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一种解释是如果使用阻塞,调用epoll-wait之后,read可能一致阻塞,但是如果水平触发使用阻塞io也可能read一致阻塞啊。


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为什么 IO 多路复用要搭配非阻塞 IO? - 知乎 (zhihu.com)

可以参考这个提问下的回答,实际上不管是边沿触发还是水平触发,都要使用非阻塞io避免可能的阻塞。


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