Date: Tue, 28 Feb 2006 16:10:38 +0100 From: Pavel Duda <element@email.cz> To: freebsd-questions@freebsd.org Subject: FreeBSD 5.4 & 6.0 slow network throughput Message-ID: <du1p5p$16q$1@sea.gmane.org>
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I have upgraded my home "server" to 5.4 from 5.2.1 and after some time
I've noticed that network throughput is very low (about 4MB/s).
I'm not expert on this field but I have checked some settings (sysctl,
netstat) and couldn't find anything suspicious. I have second machine
with almost same configuration so I tried to put there newer version of
FreeBSD 6.0 but it doesn't help. Now I've tried older version - 4.11
(only one I have available at this moment on CD) and speed is as it is
supposed to be (8-9MB/s).
Does somebody has same experience with such behaviour ? I've used
"clean" systems ie. without kernel modifications and I don't know what
could cause this (some major change in TCP stack in 5.4+ ? NIC drivers ?).
Test system:
P4, 1.8Ghz, 512MB RAM with Intel EtherExpress 100 & Realtek Gigabit NIC
(fxp & rl)
FBSD 5.4/6.0:
- avarage net thrput 3.5 - 4.5 MB/s (tested with FTP/Samba)
- netperf reports about 31-34 mbit/s with default settings
FBSD 4.11:
- avarage net thrput 7.5 - 9 MB/s
- netperf reports about 65-66 mbit/s
Testing was done over 100mbit linksys switch, 1Gbit USR switch,
crosslink cable. Four different machines used as "clients".
Thanks for any advice
Pavel
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