The policy and sensitivity of VM(Virtual Machine) migration among the clusters or servers has been the center of the debate. If the sensitivity is high, the entire infrastructure's performance is exacerbated due to frequent migration. On the other hand, if the sensitivity is low, the VM's performance on the server can be decreased due to the performance degradation of specific servers or clusters. Also, the policies have a huge impact on VM self or overall infrastructure when VMs are migrated. Therefore, a decision of the policy and sensitivity to balance the loads among clusters or servers is important for retaining the entire infrastructure's performance. In this paper, we introduce the hyper threading-aware migration method in Xen environment, improves the performance of VMs by evaluating if VM's workload is single thread or not, and arranging VMs on proper clusters (with Hyper Thread/without Hyper Thread).