Re: [Xen-users] Network dies when downloading on dom0

[Pepe Barbe <elventear@xxxxxxxxx>]

On Aug 26, 2008, at 10:21 AM, Stephan Seitz wrote:

> just passing by this thread, I'ld suggest setting tx off on both dom0
> and domU.
I always did it on domUs. I tried on dom0 and it improved things  
marginally. The network holds longer for high traffic but the delay  
still manages to increase from 80 ms up to 1000ms. Usually after that  
it just dies.
> Another problem I noticed sometimes on a few platforms on high dom0
> traffic are missing interrupts. On SMP machines I could always solve
> this by installing irqbalance inside dom0.
I tried this, but didn't help either. Similar behavior as before. What  
can I do to see if I am missing interrupts?
The only thing that manages to keep our ping delay times constant  
about 120ms (Which is the primary symptom of the network about to die)  
is to cap the traffic in our domU router.
Something interesting I noticed, is that I tried to limit the speed of  
the VIF between the router and the dom0 and it didn't help. Only  
limiting the speed on the WAN interface which is Physical interface  
hidden from the dom0 and added to the domU. Could there be some issue  
because it is not a Virtual Interface? A driver problem perhaps?
Thanks,
Pepe

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