numactl - Control NUMA policy for processes or shared memory.

Non-uniform memory access (NUMA) is a computer memory design used in multiprocessing, where the memory 
access time depends on the memory location relative to the processor. Under NUMA, a processor can access 
its own local memory faster than non-local memory (memory local to another processor or memory shared 
between processors). The benefits of NUMA are limited to particular workloads, notably on servers where 
the data are often associated strongly with certain tasks or users

From the command line, use the following:

  numactl --hardware

This will give an output similar to the following:

available: 2 nodes (0-1)
node 0 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 24 25 26 27 28 29 30 31 32 33 34 35
node 0 size: 32671 MB
node 0 free: 29022 MB
node 1 cpus: 12 13 14 15 16 17 18 19 20 21 22 23 36 37 38 39 40 41 42 43 44 45 46 47
node 1 size: 32768 MB
node 1 free: 30264 MB
node distances:
node   0   1
  0:  10  21
  1:  21  10