gig network again

[Bryan O'Neal]

How big of a file?  Was it preloaded into memory?  What is the speed of
your hard drive, your processor, your memory buss, etc.?  Try something
in the 1MB range and then in the 4MB range and then in the 256MB, 512MB,
and 2GB range and see how your numbers change. Try having something in a
ram disk and see how much faster it goes.  Try manually dropping your
connection speeds to 10mb/s and seeing how fast it goes. 
Then you have overhead.  But in truth, most of it is just the computer's
ability to feed and receive information from the network.  I would look
at it and say if you are able to download a DVD in 2 Minuets then you
are getting perfect Gigabit Speed, which I have never seen.

And yes the cable makes a huge difference.  

-----Original Message-----
From: plug-discuss-bounces at lists.plug.phoenix.az.us
[mailto:plug-discuss-bounces at lists.plug.phoenix.az.us] On Behalf Of
David
Sent: Thursday, May 17, 2007 8:03 AM
To: plug-discuss at lists.plug.phoenix.az.us
Subject: gig network again

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
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  07:57:01 up 18:45,  3 users,  load average: 0.04, 0.01, 0.50
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