Why is my .Net app only using single NUMA node?

Question

I have a server with 2 NUMA node with 16 CPUs each. I can see all the 32 CPUs in task manager, first 16 (NUMA node 1) in the first 2 rows and the next 16 (NUMA node 2) in th

Answer 1

In addition to gcserver we should enable GCCpuGroup and Thread_UseAllCpuGroups so the config should be more like:

GcCpuGroup enables Garbage Collection for multiple CPU groups and Thread_UseAllCpuGroups enables manage thread distribution across all CPU groups for the runtime.