NumaTop is a useful tool developed by Intel for monitoring runtime memory locality and analysis of processes on Non-Uniform Memory Access (NUMA) systems.  NumaTop can identify potential NUMA related performance bottlenecks and hence help one to re-balance memory/CPU allocations to maximise the potential of a NUMA system.

Initial "Top" like process view

One can select specific processes and drill down and characteristics such as memory latencies or call chains to see where code is hot.

Observing a specific process..
..and observing memory latencies
Observing per Node CPU and memory statistics
The tool uses perf to collect deeper system statistics and hence needs to be run with root privileges will only run on NUMA systems. I've recently packaged NumaTop and it is now available in Ubuntu Wily 15.10 and the source is available on github.

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