The feature to display memory usage per NUMA node

[kyet]

Hello. First of all, I would like to thank everyone who contributed to this wonderful project.

I would like to propose displaying memory usage based on NUMA nodes.
Servers typically have 2-4 CPUs (nodes), and thus they have 2-4 memory NUMA nodes as well.
Additionally, with the use of the latest technology such as the CXL Memory Expander, it is possible to add CPU-less NUMA nodes.
In such environments, it would be very useful to be able to see the memory usage per NUMA node.
Visually, it would be great to show the memory usage of each node with an accumulated graph and also allow viewing for individual nodes (similar to CPUs).

Currently, we can use following tools to get NUMA nodes usage:

• cat /sys/devices/system/node/node/meminfo
• numastat
• numactl -H

What do you think about this feature?