Description: In Linux network programming, long time used in the select to do event trigger. In the new Linux kernel, there is a kind of mechanism of replacing it, is the epoll.
Compared to select, epoll biggest advantage is that it will not be reduced as the number of monitored fd increase efficiency. Because in the implementation of the select kernel, it is to use the polling to deal with it, the number of fd polling, the more natural the more time-consuming
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epoll.c
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