gig network again

[Jon M. Hanson]

David wrote:
> I recently bought my gig network hardware:
>
> netgear GS605 switch
> 2 Tredware PICTX nics
>
> The only thing I didnt replace are the calbes.  ethtool shows both new 
> nics at 1000/full duplex.  Here's the problem.
>
> time dd if=/dev/zero of=/home/daz/udaz/testfile bs=32k count=32768
> 32768+0 records in
> 32768+0 records out
> 1073741824 bytes (1.1 GB) copied, 371.025 seconds, 2.9 MB/s
>
> real    6m11.180s
> user    0m0.020s
> sys     0m5.820s
>
> When I switch back to my 100M switch:
>
> time dd if=/dev/zero of=/home/daz/udaz/testfile bs=32k count=32768
> 32768+0 records in
> 32768+0 records out
> 1073741824 bytes (1.1 GB) copied, 437.263 seconds, 2.5 MB/s
>
> real    7m17.364s
> user    0m0.028s
> sys     0m10.113s
>
> So, the question:  Will my kernels negaotiate a 1G connection if the 
> cables are not gig qualified?   If not, then I need to look at something 
> other than the network hardware (unless I just got really crappy 
> equipment).
>
> Thanks,
> David
>
>   -- 
> "I find your lack of faith disturbing."
> --Darth Vader
> ---
>   07:57:01 up 18:45,  3 users,  load average: 0.04, 0.01, 0.50
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>   
The kernel doesn't do any negotiation for the LAN speed. That's done by
the cards themselves.

I'm confused by your test results. Are you trying to test the speed by
doing this copy over NFS?

-- 
Jon M. Hanson (N7ZVJ)
Homepage:  http://the-hansons-az.net
Weblog:    http://the-hansons-az.net/wordpress
Jabber IM: jon at the-hansons-az.net


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