Numa policy hit/miss statistics

/sys/devices/system/node/node*/numastat

All units are pages. Hugepages have separate counters.

numa_hit	A process wanted to allocate memory from this node, and succeeded.
numa_miss	A process wanted to allocate memory from another node, but ended up with memory from this node.
numa_foreign	A process wanted to allocate on this node, but ended up with memory from another one.
local_node	A process ran on this node and got memory from it.
other_node	A process ran on this node and got memory from another node.
interleave_hit	Interleaving wanted to allocate from this node and succeeded.

For easier reading you can use the numastat utility from the numactl package (http://oss.sgi.com/projects/libnuma/). Note that it only works well right now on machines with a small number of CPUs.