Hi, I've a server using epoll and I've noticed that when the traffic is low, the epoll_wait() latency goes up. I've tried to reproduce it with a single client and basically, if ep_poll() is able to find an event or the timeout is 0, the latency is down to 5usec, otherwise if it enters the waitqueue the latency goes up to 10-25usec, which impact the application performance. Looking at the code there is something like a todo ("Is it worth to try to dig for events ?") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/fs/even... Anyone knows how the situation can be improved? in theory having something like a 50usec spin loop checking for events before entering in the waitqueue should improve the situation. suggestion? patches? thanks!