netgear gigabit tuning
wsb at paralleldata.com
Mon Apr 16 15:19:01 PDT 2001
Chris Black wrote:
> We have just installed a netgear 4-port copper gigabit switch and are using
> it with netgear GA620T cards. We are trying to get maximum performance out
> of this equipment. What I am looking for is tuning instructions for gigabit
> cards. I have already done:
> echo 262144 > /proc/sys/net/core/rmem_max
> echo 262144 > /proc/sys/net/core/wmem_max
> As directed on the AceNIC driver page. I was unable to get transfers to work
> when I tried increasing the mtu to 9000 for jumbo frame support though.
> Right now I get around 39MB/s transfer rate. I am hoping to improve this.
> What type of numbers do other people with gigabit ethernet setups get?
I've seen 40MB/sec on my Giganix cards. No special tuning. That's
fast enough for me for now. I suspect you would want to increase
your read buffers and write buffers as you mention above. Also,
you might look in the driver for a local ring buffer as various
other cards use.(tulip comes to mind) Increasing that buffer count
could help too. Look at your network stats for errors to see if you're
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