Semi-polling mode and net.inet.tcp.inflight_enable

[RDB]

Hi,

I'm curious whether anyone on this list has found real-world circumstances
in which either semi-polling mode or the net.inet.tcp.inflight_enable
setting improved performance, and if so what the circumstances were.

Conversely, has anyone experienced unforseen problems (e.g. stability 
issues) with either of these new features?

http://www.freebsd.org/cgi/man.cgi?query=tcp&sektion=4&manpath=FreeBSD+4.7-RELEASE

http://www.freebsd.org/cgi/man.cgi?query=polling&sektion=4&manpath=FreeBSD+4.6-RELEASE

Sincerely,

Russell Brunelle


P.S. The release notes for 4.8-R indicate that support for HyperThreading
(via the new HTT kernel option) is "rudimentary."  I'm curious: in what
sense is it rudimentary?  Are there stability issues?  What are some of
the plans to improve this feature, if it's a feature issue rather than a
stability issue?