[Xen-users] ping times and packet losses

["Dirk H. Schulz" <dirk.schulz@xxxxxxxxxxxxx>]

Hi folks,

we do have a phenomenon that is not easy to get a hold onto. We are 
running Debian Sarge stable domUs and NetBSD domUs on Debian Sarge 
stable dom0. Xen is 2.07, compiled from the sources (with only slight 
modifications for using more of iptables).
Our domUs experience extreme slow downs in network connectivitiy once or 
twice a day. That means: ping times go up to 1.200 ms (to hosts on the 
same subnet), ping times to hosts on the internet even much higher. In 
most cases there is no packet loss, but even that can occur.
The domUs do not experience that all at the same time and not all at the 
same rate (occurences/day). There seems to be no coincidence with 
hardware issues or load (the physical machine is using 4-9 % cpu on the 
average with just one peak a day; the occurences are not related to this 
peak).
So the question is:

1. Is the packet loss problem still an issue with Xen 2.0.7?
2. Is there a (maybe related) issue with prolongued ping times?
3. If 1 or 2 is yes, can the developpers please comment on the state of 
bug fixing here?
Thanks for any input.

Dirk

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