Re: [Xen-API] [XCP-1.1] High OVS cpu load and unresponsive host network while VMPR archive phase is running

[Ben Pfaff <blp@xxxxxxxxxxxxxxx>]

Christian Fischer <christian.fischer@xxxxxxxxxxxxxxxxxxx> writes:

> On Friday 03 August 2012 10:01:34 Christian Fischer wrote:
>> On Thursday 02 August 2012 23:46:18 George Shuklin wrote:
>> > In product environment I saw that behavior few times. ovs-* processes
>> > starts to consume lot of cpu (over 100%) and start to cause packets
>> > drops.
>> > 
>> > That usually happens with 'hacked' customer VMs (sudden spike of
>> > outgoing traffic, cpu, and in few cases we assisted in research, actual
>> > trojans running on server because of some stupid php misconfiguration in
>> > yet another phpbb/cms/durpal/etc).
>> 
>> We have no customer VMs there, and we watch the vm traffic. Nothing
>> unusual. The archive phase is running. It's 100% reproducible.
>> 
>> I suppose that, in my case, it has something to do with with the OpenFlow
>> controller (Citrix DVS Controller) we tried to evaluate. Currently we do
>> some tests in an testing environment to work out the problem.
>> 
>
> Ben, Jesse
>
> can you explain what's going on here? That's on an clean installation, no 
> flow 
> controller (which had connection issues). Is that normal? Is the amount of 
> load shifting ok for Gbit ports?

Nothing here looks too bad at first glance.  Perhaps the code to
balance bonds can be improved, but that's all I see.

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