[ovirt-users] ovirt-Guest-agent CPU usage

[Vinzenz Feenstra]

> On Aug 11, 2016, at 3:08 PM, Tadas <tadas at ring.lt> wrote:
> 
> I've used http://resources.ovirt.org/pub/ovirt-3.6/iso/oVirt-toolsSetup/3.6-3/oVirt-toolsSetup_3.6-3.fc23.iso

Well this one has not the fixed issue

> But also, i've compiled ovirt guest agent from sources from github and had the same result.

The github version starting from March 15th 2016 (master / ovirt-4.0 / ovirt-3.6 branches) should actually not cause 100% CPU usage since there’s a sleep in case of an error, which seems to be happening here.

So you installed and started it how then? Are you sure that it doesn’t execute the other one?

> 
> -----Original Message----- From: Vinzenz Feenstra
> Sent: Thursday, August 11, 2016 3:39 PM
> To: tadas at ring.lt
> Cc: users at ovirt.org
> Subject: Re: [ovirt-users] ovirt-Guest-agent CPU usage
> 
> 
>> On Aug 11, 2016, at 2:20 PM, Tadas <tadas at ring.lt> wrote:
>> 
>> Sorry, managed to send corrupted message.
>> 
>> I do not think there's problems with virtio console drivers. I've
>> installed ovirt guest tools iso from http://resources.ovirt.org/pub.
>> Also I can read data from ovirt agent on hypervisor side by using
>> socat:
>> "socat pathtosocketfile  -"
>> This gives me all information about VM from ovirtagent. But as soon as
>> i close reading socket, ovirt agent loops in itself and uses whole
>> single core. If i socat again - load drops and I can see information
>> from agent again. So problem is that you allways need to have socket
>> open for read or write on hypervisor side. If not - ovirt agent will
>> consume one cpu thread. And this happens only in Windows VM.
> 
> Can you please give me the exact version of the ISO you’re using?
> I need to determine if you have the fixed one or if there’s another bug, the latest version should have this fixed already.
> 
> 
>> On Thu, 2016-08-11 at 15:13 +0300, Tadas wrote:
>>> "socat pathtosocketfile  -"
>>> This gives me all information about VM from ovirtagent. But as soon
>>> as
>>> i close reading socket, ovirt agent loops in itself and uses whole
>>> single core. If i socat again - load drops and I can see information
>>> from agent again. So problem is that you allways need to have socket
>>> open for read or write on hypervisor side. If not - ovirt agent will
>>> consume one cpu thread. And this happens only in Windows VM.
>>> 
>>> 
>>> On Thu, 2016-08-11 at 14:01 +0200, Vinzenz Feenstra wrote:
>>>> 
>>>>> 
>>>>> 
>>>>> On Aug 11, 2016, at 12:21 PM, Tadas <tadas at ring.lt> wrote:
>>>>> 
>>>>> It seems, that if socket is not opened at hypervisor side, ovirt
>>>>> agent
>>>>> starts to loop with loads of "VirtIoCHannel::200::root::Written"
>>>>> messages per second.
>>>> 
>>>> You probably don’t have the virtio drivers for the channel
>>>> communication installed
>>>> 
>>>> please install the VirtIO Console  drivers on that machine and
>>>> restart the agent service
>>>> 
>>>>> 
>>>>> 
>>>>> If hypervisor opens ovirt socket, then cpu usage drops to normal
>>>>> state.
>>>>> Is this intentional? This does not happen on Linux guest.
>>>>> On Thu, 2016-08-11 at 13:05 +0300, Tadas wrote:
>>>>>> 
>>>>>> 
>>>>>> Hello groups,
>>>>>> 
>>>>>> we are having problem with ovirt-guest agent on Windows os.
>>>>>> When
>>>>>> started, agent fully utilizes one core (if machine has single
>>>>>> core,
>>>>>> then you will see 100% CPU usage, if there are two cores, then
>>>>>> you
>>>>>> will
>>>>>> get 50% usage etc). Usage does not drop and persists for a
>>>>>> whole
>>>>>> time
>>>>>> ovirt agent is running. This happens on windows 7 32 and 64
>>>>>> versions
>>>>>> and also on windows 10. Have anybody had the same issue?
>>>>>> Thank you.
>>>>>> _______________________________________________
>>>>>> Users mailing list
>>>>>> Users at ovirt.org
>>>>>> http://lists.ovirt.org/mailman/listinfo/users
>>>>> _______________________________________________
>>>>> Users mailing list
>>>>> Users at ovirt.org
>>>>> http://lists.ovirt.org/mailman/listinfo/users
>>>> 
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> 
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