Merge branch master from git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

[sfrench/cifs-2.6.git] / Documentation / admin-guide / numastat.rst

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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 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.
+