On 17 Mar 2005, at 01:34, Cahill, Earl wrote: > Dumb question, but I am in linux, how do I tell if I am using epoll? 1) Build libevent from source (or, at least, do a ./configure) 2) grep HAVE_EPOLL config.h If you've got EPOLL support in your kernel, HAVE_EPOLL will be #defined to be 1, otherwise it will be #undefd. Richard.