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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 this node,
                                        but ended up with memory from another.
numa_foreign            A process wanted to allocate on another node,
                                    but ended up with memory from this 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
(ftp://ftp.suse.com/pub/people/ak/numa/numactl*). Note that it only works
well right now on machines with a small number of CPUs.