[pphaneuf]

Question: as the ATR is going higher, so would the proportional time spent in poll or epoll, no?

So if you have a thousand fds, and they're all active, you have to deal with a thousand fds, which would make the difference between poll and epoll insignificant (only twice as fast, not even an order of magnitude!)?

This would make the micro-benchmark quite micro! Annoyingly enough, I think that means that the real way to find out would be an httpperf run, with each backends. A lot more work...