Jun 102013
 

We found that setting the server BIOS or ESXHost Advanced Settings to a Balanced CPU Power Policy creates additional CPU Wait times for VMs with more than a single core.  This is seen more-so in VMs with four or more cores.
If you click on the cluster level object, it will populate more windows on the right.
Click on the “View Resource Distribution Chart” link within the vSphere DRS window to view the following chart:
With the BIOS and ESX Host setting at “Balanced” we see hosts with low CPU usage but higher CPU wait times.
DRSchart2

When we change this setting to High Performance, the entire cluster turns green!
 DRSchart

Check out this post on how to check and set this setting at the ESX Host level via PowerCli.
http://www.pcli.me/?p=75