Date: Tue, 19 Dec 2000 15:24:32 +1030 From: Matthew Thyer <thyerm@camtech.net.au> To: Michael Class <michael_class@hp.com> Cc: current@freebsd.org Subject: Re: Network performance-problem Message-ID: <3A3EEA08.E63EC165@camtech.net.au> References: <3A3DDDC7.6F2540B7@hp.com>
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Michael Class wrote: > > Hello, > > i am seeing a problem with 5.0-current (from 14.12.00) and a 3COM > 3CCFE575CT Lancard (pc-cardbus) using the xl-driver. [snip] > Why behaves my FreeBSD-machines worse then the other boxes? Any Ideas? Make sure you are running with the TCP/IP NewReno optimisation turned off. There are bugs in the TCP/IP NewReno code that result in bad packets and hence lots of retransmission with generally reduced network performance. I think its meant to be the default now in -CURRENT (to have NewReno off) but I'm not sure if PHK has disabled it yet. $ cat /usr/local/etc/rc.d/nonewreno.sh #!/bin/sh sysctl -w net.inet.tcp.newreno=0 echo -n " no_newreno" $ sysctl net.inet.tcp.newreno net.inet.tcp.newreno: 0 One day hopefully NewReno may be fixed as it sounded worthwhile. See Poul's messages in the freebsd-current archives. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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