KeGetCurrentNodeNumber function (ntddk.h)

The KeGetCurrentNodeNumber routine gets the NUMA node number for the logical processor that the caller is running on.

Syntax

USHORT KeGetCurrentNodeNumber();

Return value

KeGetCurrentNodeNumber returns the node number.

Remarks

In a non-uniform memory access (NUMA) multiprocessor architecture, a node is a collection of processors that share fast access to a region of memory. Memory access is non-uniform because a processor can access the memory in its node faster than it can access the memory in other nodes.

In a NUMA multiprocessor system that contains n nodes, the nodes are numbered from 0 to n-1. To get the highest node number (n-1) in the system, call the KeQueryHighestNodeNumber routine.

Requirements

See also

KeQueryHighestNodeNumber