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windowskerneldrivernuma

What is the driver equivalent of GetNumaProcessorNodeEx?

I am currently trying to hook up some kernel threads in a driver to specific NUMA nodes. To do so, I need to query the NUMA node of individual processors.

Unfortunately, GetNumaProcessorNodeEx is not available from a driver (it requires Windows.h). What is the driver equivalent of that function?

Solution

  • You can call KeQueryLogicalProcessorRelationship and request the RelationNumaNode. This will get you the affinities for every NUMA node in the system.