[ovirt-users] ovirt reports an Intel(R) Xeon(R) CPU E5-2667 v3 @ 3.20GHz as a Intel SandyBridge Family?

[Simone Tiraboschi]

On Fri, Dec 18, 2015 at 3:14 PM, gflwqs gflwqs <gflwqs at gmail.com> wrote:

> Ok
> So i can still benefit from haswell performance?
>

It depends: if your specific applications takes advantages on the haswell
specific feature no, in general why not.



>
> /Christian
>
> 2015-12-18 14:51 GMT+01:00 Simone Tiraboschi <stirabos at redhat.com>:
>
>>
>>
>> On Fri, Dec 18, 2015 at 1:02 PM, gflwqs gflwqs <gflwqs at gmail.com> wrote:
>>
>>> Hi,
>>> I have registered a new DELL R730 machine in ovirt 3.5.6 this server
>>> type has a Intel(R) Xeon(R) CPU E5-2667 v3 @ 3.20GHz.
>>> When i try to add a the new host to a cluster with a haswell architecure
>>> i get an error:
>>> "Host xxx moved to Non-Operational state as host does not meet the
>>> cluster's minimum CPU level. Missing CPU features : model_Haswell"
>>>
>>> When i look at the hardware tab on the host it says:
>>> CPU Model: Intel(R) Xeon(R) CPU E5-2667 v3 @ 3.20GHz
>>> and
>>> CPU Type: Intel SandyBridge Family
>>>
>>> This is not a SandyBridge Family processor?
>>>
>>> When i change the cluster to be a SandyBridge Family cluster the host
>>> can be activated.
>>>
>>> What are my options?
>>> - Is it a bug i can get a fix for? (I can't upgrade to 3.6)
>>> - Can i  force it to report correctly?
>>> - What am i loosing in terms of functionality/performance if ovirt
>>> thinks its a SandyBridge processor?
>>>
>>>
>> It's a bugged Haswell CPU where the TSX feature has been hardware
>> disabled by Intel with a microcode upgrade due to an hardware bug:
>>
>> http://www.anandtech.com/show/8376/intel-disables-tsx-instructions-erratum-found-in-haswell-haswelleep-broadwelly
>>
>> https://bugzilla.redhat.com/show_bug.cgi?id=1218673
>>
>> You loosed the TSX feature (Transactional Synchronization eXtensions).
>>
>>
>>
>>> Thanks!
>>> /Christian
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> Users mailing list
>>> Users at ovirt.org
>>> http://lists.ovirt.org/mailman/listinfo/users
>>>
>>>
>>
>
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