We have several servers all vms, all windows server win svr 2012 r2, 12 core, 65gb of mem.
Why do I have only 1 cpu in use? Is this an application or IIS issue where it needs to be configured to use all cpu's?
Couple things to think about:
Think about Co Stop like people and buses in traffic, where people represent threads and buses represent vCPU: Which is more efficent - Thirty passengers in thirty buses, or thirty passengers on one bus.