epoll improvements

[Valdis.Kletnieks at vt.edu]

On Thu, 16 Oct 2014 14:09:05 +0200, "Nev Ikte" said:

> 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.

Is it possible that what you're actually measuring here is your CPU's
latency coming out of a sleep state if every task is in a wait queue?
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