network perf : em driver ?
patpro at patpro.net
Fri Jan 12 02:32:53 PST 2007
On 12 janv. 07, at 10:35, Dominic Marks wrote:
>> File transfert through em0 looks quite slow : at best 17 MB/s (scp
>> gives better results than http, tested with a 120MB file)
>> File copy, from one HDD to another or from one HDD to /dev/null,
>> ranges from 30 to 48 MB/s on the FreeBSD side (SATA HD).
> Try testing FTP. SCP will be doing encryption which will slow
> the process down. I can't say which HTTP would be slower than
I'm not sure encryption slows it down, the box has 4 CPU (2 dual core
Xeon LV 1.66 GHz), and as I've said, non-encrypted HTTP was slower :/
> I have some Dell's with similar specification which will
> happily FTP back and forth at around 40MB/s which is reasonable.
I'll give FTP a try, but I would like the network to be fast for
every protocols. I'm planning to share data using NFS, WebDAV, or SMB
(and scp occasionally), but I've still to choose and configure
>> I would like to know if there is a good method to find the bottleneck
>> and to get rid of it. How comes my GbE is so slow ?
> This is a dedicated network right? No other traffic?
the Mac OS X box access the Internet via the FreeBSD gateway (mac<--
>em0(freebsd)fxp0<-->internet), so it's not absolutely dedicated to
my network benchmarks. But internet related traffic was as low as
possible during my tests (few imap sessions, one irc connexion).
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