From owner-freebsd-performance@FreeBSD.ORG  Thu Apr 10 16:42:16 2003
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Date: Thu, 10 Apr 2003 16:42:15 -0700 (PDT)
From: RDB <rdb@blarg.net>
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Subject: Semi-polling mode and net.inet.tcp.inflight_enable
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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?