I finally found the real cause of such high loads.
Main reason: https://bugs.launchpad.net/neutron/+bug/1432858
And another one: https://bugs.launchpad.net/neutron/+bug/1432856
I finally found the real cause of such high loads.
Main reason: https:/ /bugs.launchpad .net/neutron/ +bug/1432858
And another one: https:/ /bugs.launchpad .net/neutron/ +bug/1432856