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Comparing libev/ev.pod (file contents):
Revision 1.271 by root, Fri Sep 18 21:16:10 2009 UTC vs.
Revision 1.272 by root, Tue Nov 24 06:39:28 2009 UTC

… …
410 410
411This backend maps C<EV_READ> to C<POLLIN | POLLERR | POLLHUP>, and 411This backend maps C<EV_READ> to C<POLLIN | POLLERR | POLLHUP>, and
412C<EV_WRITE> to C<POLLOUT | POLLERR | POLLHUP>. 412C<EV_WRITE> to C<POLLOUT | POLLERR | POLLHUP>.
413 413
414=item C<EVBACKEND_EPOLL> (value 4, Linux) 414=item C<EVBACKEND_EPOLL> (value 4, Linux)
415
416Use the linux-specific epoll(7) interface (for both pre- and post-2.6.9
417kernels).
415 418
416For few fds, this backend is a bit little slower than poll and select, 419For few fds, this backend is a bit little slower than poll and select,
417but it scales phenomenally better. While poll and select usually scale 420but it scales phenomenally better. While poll and select usually scale
418like O(total_fds) where n is the total number of fds (or the highest fd), 421like O(total_fds) where n is the total number of fds (or the highest fd),
419epoll scales either O(1) or O(active_fds). 422epoll scales either O(1) or O(active_fds).

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