A number of VMs in a host are experiencing processor contention, showing down operations Which of the following host hardware upgrade paths would yield higher VM performance, for the same VMs in the…

Modern 64-bit processors include hardware virtualization extensions such as Intel VT-x and AMD-V, which allow the hypervisor to execute most guest VM instructions natively on the CPU rather than through software emulation. On a 32-bit host without these extensions, the hypervisor must emulate CPU operations in software, creating severe overhead and processor contention as multiple VMs compete for emulated resources. Migrating to 64-bit CPUs unlocks hardware-assisted virtualization and addresses the architectural root cause of the performance degradation across all VMs on the host.

Downgrading from 64-bit to 32-bit architecture would severely limit addressable memory, remove hardware virtualization extension support, and make processor contention dramatically worse.

Increasing core clock speed provides a modest per-core performance improvement but does not resolve contention caused by the absence of hardware virtualization extensions, which impose overhead regardless of clock speed.

Adding more CPU cores increases parallel processing capacity and can reduce contention by allowing more VMs to run simultaneously, but it does not address the fundamental architectural limitation of missing hardware virtualization support that is the root cause of the inefficiency.