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From: Darcy Buskermolen <darcy@wavefire.com>
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Date: Fri, 4 Mar 2005 15:26:05 -0800
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cc: Charles Sprickman <spork@fasttrackmonkey.com>
Subject: Re: FreeBSD 4.x and OS-X tcp performance
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On Friday 04 March 2005 14:34, Charles Sprickman wrote:
> Howdy,
>
> Sorry to bring what seems like a simple issue up here.  I had been blaming
> slow afp filesharing between my OS-X (10.3.8 and previous) and FreeBSD 4.x
> boxes on netatalk's afp implementation for some time.  Not too long ago I
> got frustrated with this and tried smb and then ftp.  On a simple 10/100
> network, and even with just a crossover between two boxes it seems that
> any tcp transfer tops out at around 250KB/s.
>
> On the same network using the same switch I can get near line-rate to an
> OpenBSD box and to another OS-X box.
>
> If I use nfs and force udp as the transport, I *do* get near line-rate
> between OS-X and FBSD.
>
> My 5.3 box is tanked at the moment, so I cannot tell if the problem
> happens there as well.  I do have a full ADC account, so I will be testing
> with the latest Tiger preview shortly, and the ADC access does give me a
> decent bug reporting facility if the fault lies within the OS-X tcp stack.
>
> I'm no tcpdump wizard, would anyone care to help me track this down?

I'd start with ensureing your nic's media options are properly set (I've seen 
this exact behavior during duplex mismatches)
>
> Thanks,
>
> Charles
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