Ok

So i can still benefit from haswell performance?

/Christian

2015-12-18 14:51 GMT+01:00 Simone Tiraboschi <stirabos@redhat.com>:

On Fri, Dec 18, 2015 at 1:02 PM, gflwqs gflwqs <gflwqs@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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