1. A method comprising: receiving performance metrics associated with at least one virtual machine (VM) executing on a host; determining that the host is in a densely provisioned state based on a comparison of at least one performance metric to a corresponding threshold; modifying scheduling of at least one process thread configured to handle emulating networking for the VM responsive to determining that the host is in the densely provisioned state; and modifying configurations of a physical network interface underlying a virtual network interface card of the VM that the host is in the densely provisioned state.