[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 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
>
>
>
>
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