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I need to know about Epoll On linux System.
Could you recommend manual or guides about epoll library?
need more detailed guides. it's better to have some examples.
help me. and Thank you for reading.
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epoll is a Linux kernel system call for a scalable I/O event notification mechanism, first introduced in version 2.5. 44 of the Linux kernel. Its function is to monitor multiple file descriptors to see whether I/O is possible on any of them.
epoll_ctl with EPOLL_CTL_ADD should be called once for each socket. And when epoll_wait is called, it will monitor all the sockets that are added and return only those FDs that have some events to consume.
The main difference between epoll and select is that in select() the list of file descriptors to wait on only exists for the duration of a single select() call, and the calling task only stays on the sockets' wait queues for the duration of a single call.
Here's an introduction to Epoll, a pretty basic tutorial: http://blog.kovyrin.net/2006/04/13/epoll-asynchronous-network-programming/
A more complete example can be found here: https://banu.com/blog/2/how-to-use-epoll-a-complete-example-in-c/
Also, the man pages
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