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Date:      Tue, 30 May 2006 16:26:39 -0400 (EDT)
From:      "Lucas Holt" <luke@foolishgames.com>
To:        "Mike Meyer" <mwm-keyword-freebsdhackers2.e313df@mired.org>
Cc:        hackers@freebsd.org
Subject:   Re: Asymmetric ethernet throughput?
Message-ID:  <1225.141.218.159.32.1149020799.squirrel@www.foolishgames.com>
In-Reply-To: <17532.42196.508218.964130@bhuda.mired.org>
References:  <17532.42196.508218.964130@bhuda.mired.org>

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Does disabling net.inet.tcp.inflight.enable make any difference?  I've
noticed strange transfer speed differences between a samba server on
freebsd 6.1 and OS 10.4.6 clients and Windows.

With these set in /etc/sysctl.conf, I can get reasonable speeds on both
the macs and windows box.
net.inet.tcp.delayed_ack=0
net.inet.tcp.inflight.enable=0

I also needed to set these in /usr/local/etc/smb.conf
socket options = TCP_NODELAY SO_SNDBUF=8576
use sendfile = yes

I've also experimented with other settings like lowering the quality of
the timer with kern.timecounter.hardware=TSC which seemed to increase
throughput in some cases but not others.

Luke




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