Finding the closest Non-uniform Memory Access (NUMA) node is an important part of Benchmark testing.
To find the closest NUMA node on a Windows Server, perform the following:
Open a PowerShell window and execute Get-NetAdapterRss –Name <Connection Name>.
Where <Connection Name> is the name assigned to the desired interface, in this case “Ethernet 4”, as the example shows below:
The RssProcessorArray field displays the closer NUMA node.
The array should have entries that are in the G:C/D format where:
G - The processor group
C - The processor core ID
D - The distance between the NUMA node closest to the physical PCI slot (where the NIC is installed) to the NUMA node (where the processor core C resides).
We recommend using only cores with D=0, implying they are within the closest NUMA node to the NIC.