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

[Christian Fischer <christian.fischer@xxxxxxxxxxxxxxxxxxx>]

On Monday 13 August 2012 21:55:22 Ben Pfaff wrote:
> 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.

Good, the poll_loop messages are no reason to be panic? Are they "normal"?


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