Im just following, I have the exact same problem.
Im running ESXi 5.1 on a IBM x3550M4 with 7 citrix servers with each 2vcpu.
the Ibm server has 2 x 2.9GHz E5-2690 processers and 8 cores each. the 7 citrix VM are running on local storage on 4 sas HD in a RAID 5 configuration
So i am also interrested if there is anything to eliminate this.
Im baffeld because there should be cores enough to support each VM so that each VM get one physical core
Kind regards
Jesper