Re: Excessive ethernet interrupts on AM335x board

Koen Kooi
2013-03-13T08:44:24Z

Op 12 mrt. 2013, om 16:35 heeft Mark Jackson <mpfj-list@mimc.co.uk> het volgende geschreven:

> I'm just fighting an issue with ethernet on our custom AM335x board:-
>
> # uname -a
> Linux nanobone 3.9.0-rc2-00113-gd60f039 #139 Tue Mar 12 15:14:01 GMT 2013 armv7l GNU/Linux
>
> Every now and then, the whole unit slows to a crawl. The only indication of any problem is:-
>
> (a) the serial tty port becomes much less responsive
> (b) normal ping times jump from 1ms to >10sec (sometimes >20sec !!)
> (c) the ethernet interrupt count rockets (see below)

You probably have PG2.x silicon, have a look at this patch: https://github.com/beagleboard/kernel/blob/3.8/patches/net/0003-cpsw-Fix-interrupt-storm-among-other-things.patch

I saw some patches going into net-next today that might address this in a different way, but I haven't tried 3.9rc on an am335x yet.