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| -rw-r--r-- | Documentation/numastat.txt | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/Documentation/numastat.txt b/Documentation/numastat.txt new file mode 100644 index 000000000..aaf166748 --- /dev/null +++ b/Documentation/numastat.txt @@ -0,0 +1,30 @@ +=============================== +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. + |