Each esx server has a performance profile thats set by the vendor (in our case dell) 

This task involves baselining after changing the power profile from bios perspective, and also allowing vsphere to configure it on its own, resulting in a 10 vm baseline per change.

one change bios profile

second change vsphere control profile

High Level description:

1) Check current bios powerprofile -> if its currently set to "Perf Optimized' Skip to section B

2) Set Bios power plan to use 'Performance Optmizied' 

3) Run benchmark of 10 vms single host cold migration

Section B - OS level bios control

This gives Vmware control over perf settings and is more applicable to non-dell customers.

1) Check check bio settings of 1 esx host, see bio power settings discussed on page 6 of 

https://www.vmware.com/content/dam/digitalmarketing/vmware/en/pdf/techpaper/performance/hpm-vsphere7-perf.pdf

On page 6 in section: BIOS Settings

Change: Performance Per Watt (DAPC). Change this to Performance Per Watt (OS) to transfer control to vSphere/ESXi.

2) Set Host Power Management in vsphere 7.0 - to High Performance on 1 esx 

3) Run benchmark of 10 vms single host cold migration