mapesdhs wrote:
Quick update, got it working! Echoing diegel's comments, turned out the card was faulty. Tried another one this
morning and the connection worked first time, though atm the performance is very poor so I'm still looking into
possible kernel tuning issues. However, it's faster than the old 10/100 which is something, perhaps because
now the link is full duplex (10/100 card for O2 does not support full duplex mode).
If anyone has any ideas about how to tune the kernel for optimal performance of a Gbit card, please post, PM
or email. Perhaps sendspace/recvspace values?
Ian.
PS. To give you some idea how bad the performance is just now, a simple ftp only gave 15MB/sec, while a
ttcp test gave a mere 32MB/sec.
What was the CPU doing during these tests? I suspect the O2's cpu is woefully underpowered to handle processing gigabit traffic. Maybe try jumbo frames if the rest of your network supports it, though. It would cut down on some of the overhead processing that your CPU is doing. I'm just taking stabs in the dark based on general networking knowledge, though.
EDIT: Bahahahahaha Ian was working on this in 2012. I am good at paying attention. Ian, did you ever get reasonable performance out of that gigabit board?