aboutsummaryrefslogtreecommitdiff
path: root/Documentation/numastat.txt
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/numastat.txt')
-rw-r--r--Documentation/numastat.txt22
1 files changed, 22 insertions, 0 deletions
diff --git a/Documentation/numastat.txt b/Documentation/numastat.txt
new file mode 100644
index 00000000000..80133ace1eb
--- /dev/null
+++ b/Documentation/numastat.txt
@@ -0,0 +1,22 @@
+
+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.
+