On 03/28/2017 05:04 PM, Jiří Sléžka wrote:
On 03/28/2017 01:50 PM, Michal Skrivanek wrote:
On 28 Mar 2017, at 13:41, Jiří Sléžka <jiri.slezka@slu.cz> wrote:
On 03/28/2017 12:34 AM, Jiří Sléžka wrote:
Hi all,
I have just upgraded ovirt manager from 4.1.0 to 4.1.1, then I have upgraded one host. After reboot and activation of this host some vms started to migrate here.
Some time after migration CPU of this vms go to 100% and vms become unreachable.
There is /var/log/libvirt/qemu/hypnos.log (hypnos is one of this vms) https://pastebin.com/U30xfBMJ
Powering off and starting again solve this but I would like to have a glue what is happening.
I suspect this line
2017-03-27T22:09:23.746710Z qemu-kvm: warning: TSC frequency mismatch between VM (2600031 kHz) and host (2100024 kHz), and TSC scaling unavailable
Original host uses "AMD Opteron(TM) Processor 6238" with "cpu MHz: 2600.113" and upgraded host uses "AMD Opteron(tm) Processor 6172" with "cpu MHz: 2100.097".
It looks like it isn't problem with 4.1.1 at all.
There is just missing tsc_scale cpu flag on our older AMD CPUs...
http://unix.stackexchange.com/questions/296636/100-cpu-utilisation-and-hang-...
This is probably unsolvable hw problem, right?
And this is without host-model CPU type? That 6172 should be Opteron G3…is that what you have set in your Cluster?
Yes, Cluster CPU type is set to AMD Opteron G3. 6172 should be G3 (we have 3 of 4 hosts in this cluster with 6172 CPU), 6238 is probably G4 but forced (I hoped) to G3.
Problem occurs only when migrating from 6238 CPU to 6172.
maybe the question should be: Should setting "Cluster CPU type" to "AMD Opteron G3" filter out tsc_scale cpu flag on newer AMD CPUs? I hope so. Is it correct? Cheers, Jiri
Cheers,
Jiri
Thanks, michal
Cheers,
Jiri
Cheers,
Jiri
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