epoll机制:epoll_create、epoll_ctl、epoll_wait、close

https://www.cnblogs.com/xuewangkai/p/11158576.html

https://blog.csdn.net/yusiguyuan/article/details/15027821

 

 

 

 

 

 

 

阻塞IO 非阻塞IO

https://blog.csdn.net/historyasamirror/article/details/5778378