tech_memo / linux / NUMA

tech_memo/linux

numactl †

• numaパラメータ情報

  [root@racserver1 ~]# numactl --show
  policy: default
  preferred node: current
  physcpubind: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
  cpubind: 0 1
  nodebind: 0 1
  membind: 0 1

• node(socket)ごとの情報

  [root@racserver1 ~]# numactl --hardware
  available: 2 nodes (0-1)
  node 0 cpus: 0 1 2 3 4 5 12 13 14 15 16 17
  node 0 size: 49138 MB
  node 0 free: 29173 MB
  node 1 cpus: 6 7 8 9 10 11 18 19 20 21 22 23
  node 1 size: 49152 MB
  node 1 free: 30394 MB
  node distances:
  node   0   1
    0:  10  20
    1:  20  10

interleave option †

• interleave=default
  • 
• interleave=all
  • 

swap insanity problem †

• http://blog.jcole.us/2010/09/28/mysql-swap-insanity-and-the-numa-architecture/