Not sure how long this has been a thing, but I recently discovered that mpstat takes a -N option for “NUMA Node” that works in the same way as -P for “Processor”. e.g. $ mpstat -N 0,1 1 will show stats for NUMA nodes 0 and 1 every 1 second. Just like mpstat -P ALL shows all processors mpstat -N ALL shows all NUMA nodes (and is easier to type).

The output looks like this

05:09:17 PM NODE    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest  %gnice   %idle
05:09:18 PM    0    1.13    0.00    9.30    0.00    0.28    0.15    0.00   31.78    0.00   57.21
05:09:18 PM    1    0.40    0.00    8.03    0.00    0.28    1.05    0.00   31.34    0.00   58.78
^C

Average:    NODE    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest  %gnice   %idle
Average:       0    0.80    0.00    8.56    0.00    0.27    0.11    0.00   36.49    0.00   53.78
Average:       1    0.49    0.00   10.02    0.00    0.32    1.01    0.00   25.13    0.00   63.03

Using mpstat -N is is quite easy to check to see how the workload is distributed among the NUMA nodes of a multi-socket machine.