Have read many contradictory statements on the web, I just wanted to know
how to avoid thread thrashing on high performance TCP/IP servers in Linux
(think hundreds of simultaneous active connections [like a web server.])

I'd read something about, in a couple of places, a fairly recent kernel
addition that signals a thread when activity occurs on an FD (but not
something that polls like the bad old days (at several microseconds per
FD...)

Thanks,
WTH