Re: rtl8139 stop working under high load

[Farkas Levente <lfarkas@lfarkas.org>]

Dor Laor wrote:
> Farkas Levente wrote:
>> hi,
>> i'm just switch to the use rtl8139 network emulator in kvm-70 for the 
>> guests, but under high load it's simple stop working. a reboot or even a
>> service network restart
>> solve the problem, but imho there should have to be some bug in the 
>> qemu's rtl8139 code. and there is not any kind of error in any log 
>> (neither the host's nor the guest's).
>> this not happened with e1000. but with e1000 the network sometimes 
>> seems to breathing (sometimes slow down and then speed up again).
>> do currently which is the preferred network network device in qemu/kvm?
>> thanks.
>>
> I think rtl8139 is the most stable, and afterwards virtio and e1000 
> (which both perform much better too).
> Maybe it's irq problem. Can you run the same test with -no-kvm-irqchip ?

it happened when i run revisor to build iso through an nsf mounted 
volume (where the nefs server was another kvm guest). i try 4 times with 
rtl8139 and it always stop working. when i switch back to e1000 then 
this not happened.
i can't test it now remotely:-(

-- 
   Levente                               "Si vis pacem para bellum!"