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[Xen-users] Heterogeneous XCP 1.6 pool

  • To: xen-users@xxxxxxxxxxxxx
  • From: Eduardo Bragatto <eduardo@xxxxxxxxxxxx>
  • Date: Mon, 24 Jun 2013 23:10:15 -0300
  • Delivery-date: Tue, 25 Jun 2013 02:11:51 +0000
  • List-id: Xen user discussion <xen-users.lists.xen.org>


I've been trying to use E5520 and X5650 together in an heterogeneous pool 
without success.

I know the combination is not on the official XenServer supported list 
(http://hcl.xensource.com/CPUPoolsList.aspx), but I thought it would be 
possible to set the mask anyway and see for myself if the combination works…

My problem is that the mask doesn't "stick" after a reboot… "compare-cpu" 
returns the following output:

                CPU 1:
           model name: Intel(R) Xeon(R) CPU           E5520  @ 2.27GHz
             features: 009ce3bd-bfebfbff-00000001-28100800
        masking level: full

                CPU 2:
           model name: Intel(R) Xeon(R) CPU           X5650  @ 2.67GHz
             features: 029ee3ff-bfebfbff-00000001-2c100800
        masking level: full

               Result: CPU 1 and CPU 2 are compatible for masking
            Mask type: 2 - CPU 1 has a subset of features to CPU 2
                 Mask: 009ce3bd-bfebfbff-00000001-28100800

Then, I set the mask on the X5650 as this:

# xe host-set-cpu-features features=009ce3bd-bfebfbff-00000001-28100800

When I run "xe host-cpu-info" I see that mask is set in "features_after_reboot" 
-- however, after the reboot, the mask is simply not applied, and the original 
"029ee3ff-bfebfbff-00000001-2c100800" is the only mask shown on "host-cpu-info".

Is there anything else I should do to ensure the cpu mask is configured at boot?

Best regards,
Eduardo Bragatto
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