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Date:      Mon, 02 Dec 2002 00:01:56 -0800
From:      Terry Lambert <tlambert2@mindspring.com>
To:        Craig Reyenga <creyenga@connectmail.carleton.ca>
Cc:        freebsd-current@freebsd.org, Christopher J Olson <chriso@tamu.edu>
Subject:   Re: Any ideas at all about network problem?
Message-ID:  <3DEB1374.9E9BFDB@mindspring.com>
References:  <2668299.1038795112570.JavaMail.creyenga@connectmail.carleton.ca> <3DEAE3E3.234605A9@mindspring.com> <001101c299bd$d2cc53b0$0200000a@sewer.org> <3DEAEA67.97073515@mindspring.com> <001001c299c7$766a6120$0200000a@sewer.org>

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Craig Reyenga wrote:
> I just tried a 3com 3c905 NIC (my roommate's) and it _also_
> transfers slowly (about 3.5MB/sec, so just under half of what i used to
> get with my realtek in -stable). It also spit out a few messages:

[ ... ]

> I'd really rather not play around with different versions of FreeBSD to
> fix this problem, because this computer is where I keep all of my stuff,
> and with exams, I just won't have the time. Yes I know that I "shouldn't be
>  using 5.0 then" but a problem is a problem and it should be fixed.

Your alternative to doing the necessary binary search is to
provide enough information that someone else can repeat the
reduced performance you are getting with your hardware, so
that they can perform the binary search on your behalf.

FWIW, the root cause is likely a result of something in the
last 8 months, which means log2(240)+1 = 8 compiles to find
the problem on your hardware; if, in the last 2.5 years,
which we know to be the case, it's log2(2.5*365)+1 = 10
compiles.

You already have hardware to test the kernels out on, to see
if a particular version has the problem, so you're the logical
candidate to do the compiling.  Given a 1GHz machine, we are
probably talking about 6 hours elapsed time, given a local CVS
tree, and compiling and testing occurring serially.

If you don't want to do the work, you are going to have to
provide a better characterization of the problem so that it
can be repeated by someone who's willing to do it on your
behalf, or out of curiousity; most people who could deal with
it for you aren't the types to buy RealTek or 3C905 ethernet
cards, which the driver comments suggest are badly designed
hardware.

-- Terry

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