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Date: Wed, 17 Nov 2004 20:48:11 -0500 (EST)
From: "Mike Jakubik" <mikej@rogers.com>
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cc: freebsd-stable@freebsd.org
Subject: Re: serious networking (em) performance (ggate and NFS) problem
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Emanuel Strobl said:
                                       ^^^^^^^^ ~ 15MB/s
> .....and with 1m blocksize:
>  test2:~#17: dd if=/dev/zero of=/samsung/testfile bs=1m
>  ^C61+0 records in
>  60+0 records out
>  62914560 bytes transferred in 4.608726 secs (13651182 bytes/sec)
> ->                                                ^^^^^^^^ ~ 13,6MB/s
>
> I can't imagine why there seems to be a absolute limit of 15MB/s that can
> be
> transfered over the network

I have two PCs connected together, using the em card. One is FreeBSD 6
from Fri Nov  5 , the other is Windows XP. I am using the default mtu of
1500, no polling, and i get ~ 21MB/s tranfser rates via ftp. Im sure this
would be higher with jumbo frames. Both computers are AMD cpus with Via
chipsets. Perhaps its your hard drive that cant keep up?