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With the growth of Infrastructure as a Service (IaaS) cloud providers, many have begun to seriously consider cloud services as a substrate for HPC applications. While the cloud promises many benefits for the HPC community, it currently does not come without drawbacks for application performance. These performance issues are generally the result of resource contention as multiple VMs compete for the same hardware. This contention culminates in cross VM interference whereby one VM is able to impact the performance of another. For HPC applications this interference can have a dramatic impact on scalability and performance. In order to fully support HPC applications in the cloud, services need to be available that prevent cross VM interference and isolate HPC workloads from other users. As a means to achieve this goal, we propose a dual stack approach to IaaS cloud services that utilizes multiple concurrent VMMs on each node capable of partitioning local resources in order to provide performance isolation. Each partition can then be managed by a specialized VMM that is designed specifically for either an HPC or commodity environment. In this paper we demonstrate the use of the Palacios VMM, a virtual machine monitor specifically designed for HPC, in concert with KVM to provide a partitioned cloud platform that is capable of hosting both commodity and HPC applications on a single node without interference. Furthermore, our results demonstrate that running KVM and Palacios in parallel allows an HPC application to achieve isolated and scalable performance while sharing hardware resources with commodity VMs.