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Table Of Contents
Procedure
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Enable the AMD Opteron Gen. 3 (no 3DNow!) EVC mode for your EVC cluster.
The steps to enable the EVC mode differ depending on whether you are creating a cluster or enabling
the mode on an existing cluster, and on whether the existing cluster contains powered-on virtual
machines.
Option Description
Creating a new cluster
In the New Cluster wizard, enable EVC for AMD hosts and select the
AMD Opteron Gen. 3 (no 3DNow!) EVC mode.
Editing a cluster without powered-
on virtual machines
In the Cluster Settings dialog box, edit the VMware EVC settings and
select the AMD Opteron Gen. 3 (no 3DNow!) EVC mode.
Editing a cluster with powered-on
virtual machines
The AMD Opteron Gen. 3 (no 3DNow!) EVC mode cannot be enabled
while there are powered-on virtual machines in the cluster.
a Power-off any running virtual machines in the cluster, or migrate them
out of the cluster using vMotion.
Migrating the virtual machines out of the cluster with vMotion allows
you to delay powering off the virtual machines until a more
convenient time.
b In the Cluster Settings dialog box, edit the VMware EVC settings and
select the AMD Opteron Gen. 3 (no 3DNow!) EVC mode.
c If you migrated virtual machines out of the cluster, power them off
and cold migrate them back into the cluster.
d Power on the virtual machines.
You can now add hosts with AMD processors without 3DNow! instructions to the cluster and preserve
vMotion compatibility between the new hosts and the existing hosts in the cluster.
View CPUID Details for an EVC Cluster
The feature set exposed by an EVC cluster corresponds to the feature set of a particular type of processor.
Processor feature sets can be described by a set of feature flags that you can examine using the CPUID
instruction.
You can view the CPUID feature flags currently exposed by the hosts in an EVC cluster using the Current
CPUID Details dialog box.
Prerequisites
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You must be connected to a vCenter Server system with the vSphere Client.
Procedure
1 Display the cluster in the inventory.
2 Right-click the cluster and select Edit Settings.
3 In the left panel, select VMware EVC.
4 To view the CPUID feature flags currently enforced by EVC, click Current CPUID Details.
The Current CPUID Details dialog box displays the CPUID feature flags that EVC is enforcing for the hosts
in this cluster. For more information on CPUID feature flags, see Intel Processor Identification and the CPUID
Instruction (available from Intel), or CPUID Specification (available from AMD).
vSphere Administration with the vSphere Client
132 VMware, Inc.