-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi Manuel,
* 100% interrupt rate * oodles of "sip0: FIFO ring overrun" on one server * "fxp0: device timeout" on the other server * oodles of "nfs_timer: ignoring error 64" on all domUs What I did *not* find was any massive network traffic. I.e. no raging storms that I could see.Hi,how old are your dom0 and domU kernels ? An issue have been fixed recently(virtual interfaces not checking the ethernet addresses in packets) which could cause the kind of issue you're seeing. The fix has been pulled up to the netbsd-3 and netbsd-3-0 branches.
All kernels were original 3.0 machines, only modified to allow the dom0s to deal with larger numbers of vnd devices, i.e. without that fix (that I had not noticed).
I will rebuild and see if I can trigger this again. However, as I've had zero trouble in all my prior testing I guess I will not easily verify if this was indeed my problem, but will have to wait until the next time I have live students (nothing beats students for finding problems). I will let you know whether that works out or if I end up in trouble again...
But I agree the (fixed) problem sounds like a plausible explanation to the problems I saw. Especially as I run a larger number of simultaneous domUs than most (10+) and hence would probably be harder hit by that problem.
Thanks, Johan -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (Darwin) iD8DBQFEBP0AKJmr+nqSTbYRAkYOAKCkA+j56Momk8vFL1uIEmswVrteewCeK1mV aIhSpf6KznorW3YuM5CZ1mo= =0ZuH -----END PGP SIGNATURE-----