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Date: Thu, 10 Nov 2005 07:48:14 -0500
From: Mike Jakubik <mikej@rogers.com>
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To: Robert Watson <rwatson@FreeBSD.org>
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Cc: freebsd-performance@freebsd.org, Arkadi Shishlov <arkadi@mebius.lv>
Subject: Re: Poor Samba throughput on 6.0
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Robert Watson wrote:
> There are a number of TCP related configuration frobs on FreeBSD.  It 
> would be quite interesting to know how modifying each of the following 
> settings affects Samba performance:
>
> net.inet.tcp.delayed_ack
> net.inet.tcp.sack.enable
> net.inet.tcp.inflight.enable
>
> There has been recent evidence that the inflight bandwidth calculation 
> is having problems generating stable performance at high bandwidth and 
> low latency, so I might try that one first.
I get about ~3MB/s extra, and a 16MB/s peak, with inflight disabled, 
when downloading from the FreeBSD server to WindowsXP. An improvement, 
but still not a desirable result. The other variables do not seem to 
make much of a difference.