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vcpupin is the process where-in each vCPU assigned to the VM is tied to a physical core/thread. Configuring this has the most profound impact when dealing with a system that has multiple NUMA Nodes because it forces requests to memory to stay on one node without having to cross Intel's QPI links or AMD's Infinity Fabric. This also helps by tying the vCPUs to the Node that is directly connected to the GPU.
<span style="color: red;">'''NOTE: In many cases a function in the BIOS known as Memory Interleave will obfuscate the NUMA Nodes making the system treat multiple sockets or multiple dies as one UMA(Uniform Memory Access) Node. This is a problem for multiple reasons. To fix this find Memory Interleave in your BIOS and set it from Auto -> Channel. If Memory Interleave does not have these options on a single socket system then chances are the system only operates in UMA mode. In such case this is fine.'''</span>
=== Identifying CPU Affinity ===
