poll is a POSIX system call to wait for one or more file descriptors to become ready for use.[1]

On *BSD and macOS, it has been largely superseded by kqueue in high performance applications.[2] On Linux, it has been superseded by ppoll and epoll.[2]

See also


  1. ^ Charles M. Hannum; The NetBSD Foundation, Inc. (1998). "poll, pollts — synchronous I/O multiplexing". BSD Cross Reference. NetBSD.
  2. ^ a b "Connection processing methods". nginx.org.