Lousy Network Performance

[Kurt Wall]

On Tue, Jun 28, 2005 at 02:29:43PM +1000, James McDonald took 0 lines to write:
> On Mon, Jun 27, 2005 at 10:56:34PM -0400, Kurt Wall wrote:
> > Hi, list,

[crappy latency]

> If you are using a crossover cable check your duplex settings. I have
> found performance gains by either enabling/disabling duplex.

$ dmesg | grep dup
eth0: Setting full-duplex based on MII#1 link partner capability of 45e1.
eth1: Setting full-duplex based on MII#1 link partner capability of 41e1.

I can try half-duplex when I get home, but why that should speed things
up eludes me.

> Use a tool like ttcp to push raw packets back and forwards... You
> should be getting around 100Mbps.
> 
> As a matter of interest what are the cards? and what kernel module do
> they use?

I tried swapping cards and still have marginal performance. The current
cards are 

00:0d.0 Ethernet controller: Lite-On Communications Inc LNE100TX (rev 20)
00:0f.0 Ethernet controller: 3Com Corporation 3c905B 100BaseTX [Cyclone] (rev 30)

Kurt
-- 
"I couldn't remember when I had been so disappointed.  Except perhaps
the time I found out that M&Ms really *do* melt in your hand ..."
		-- Peter Oakley