Alex Atkin UK wrote:
Wits only that one card that shows problems.
The card alone is not at issue. It's a system issue. You're a bit rash to blame the card considering that others have stable pings and that you're having trouble with other hardware:
Alex Atkin UK wrote:
I was having reliability issues with the Realtek card on my Atom D525 board. What is it with Linux and ethernet problems lately? Last time I had issues like this was with a 3COM 10-BASE-T card, many moons ago.
I've got no ping spikes or other issues on the Realtek NICs I've used on small Linux servers. And I don't recall having issues with the old 3COM cards either, although I might not have used them with Linux.
Well, I have tried Mageia 2, Ubuntu 12.04, Mandriva 2011 and Fedora 17 and only Mandriva was immune to the problem and ONLY on its original 2.6.38 kernel, it developed the problem too when it updated to 2.6.39.
Strangely, I also added a second LAN adapter using the identical chipset into the PCIe x1 slot, that DOESN'T suffer the problem at all. I wonder what the difference is between the on-board implementation and the PCIe one?
Fortunately someone else with the same problem
found a temporary fix, so I am using that for now to get round the problem.
I have settled on Fedora 17 64bit for now as it appears the most responsive on this board so far (once I turned off SELinux, was very laggy before that). Very pleased to see ttcp able to max out the Gigabit Ethernet using relatively little CPU load. Now to actually do something useful with it.
Incidentally, the Realtek NIC issue I was having on the previous Atom board is also well documented. It basically would only bring up the link once at boot and if it lost the link for whatever reason such as rebooting the router it was connected to, you had to power cycle the machine to get it back. I believe the problem may be finally fixed now in the 3.2.x/3.4.x kernels which are common to the latest distro releases.
Another interesting thing about my experiments with this board is I see very little difference in power consumption between idle and load, its literally a watt or two. Perhaps the PSU I am using sucks as I have never seen it drop below 14W, yet it also doesn't seem to have climbed since I added the second NIC, which would seem to concur that its PSU losses. Once I can finally get the M350 bracket for the board I will order a better PSU at the same time, hopefully get those watts down a little.