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Date:      Wed, 27 Jul 2005 03:46:33 +0400
From:      "Andrew P." <infofarmer@gmail.com>
To:        Casey Scott <casey@phantombsd.org>
Cc:        questions@freebsd.org
Subject:   Re: 100Mbit network performance - again
Message-ID:  <cb520642050726164619ee35bd@mail.gmail.com>
In-Reply-To: <25096.199.181.134.212.1122420447.squirrel@mail.phantombsd.org>
References:  <cb52064205072616005af207a8@mail.gmail.com> <25096.199.181.134.212.1122420447.squirrel@mail.phantombsd.org>

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On 7/27/05, Casey Scott <casey@phantombsd.org> wrote:
> > Hello all!
> >
> > I remember being able to reach 11-12Mbytes/s between two Win95
> > workstations with NE2000 $10 NIC's installed, connected via BNC cable.
> > I am now able to reach 11-12Mbytes/s between all kinds of Windows
> > 2000/XP machines with all kinds of cheapest 100Mbit ethernet hardware.
> >
> > But I have never ever exceeded 8-9Mbytes/s between a Windows machine
> > and a FreeBSD box - _never_. Be it Samba, different ftp/http servers,
> > different FreeBSD versions (4.x/5.x), with ipfw enabled or disabled,
> > etc., - the speed always hovers around 7-8Mb/s. I know it's not
> > critical, I know I should've upgraded to Gigabit hardware long ago,
> > but is there something wrong?
> >
> > I tried different linux distros, but they all seem to be even slower.
> > Wazzup?..
> >
> > Thanks,
> > Andrew P.
> > _______________________________________________
> > freebsd-questions@freebsd.org mailing list
> > http://lists.freebsd.org/mailman/listinfo/freebsd-questions
> > To unsubscribe, send any mail to
> > "freebsd-questions-unsubscribe@freebsd.org"
> >
>=20
>=20
> Keep in mind that the Windows TCP/IP window buffers are not optimized the
> same way as FBSD or Linux.
>=20
> Casey
>=20
>=20
No doubt about that. Any thoughts about how to make them communicate
more effectively?

Personally, I don't think it's just window buffers. I think the whole
darn TCP/IP stack misconfiguration plus maybe not perfect NIC drivers
are the reason for underperformance. I know that most of the real
"mistakes" must be on the Windows side, but that's not an excuse for
FreeBSD/Linux to not be at least 99%-Windows-networking-compatible.

Andrew P.



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