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Metric improvements for NUMA automatic balancing #1093

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@artem

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@artem

Linux kernel counts the following metrics:

  • numa_hint_faults Records how many NUMA hinting faults were trapped.
  • numa_hint_faults_local Shows how many of the hinting faults were to local nodes.

Essentially, the number of faults to foreign nodes is calculated as numa_hint_faults - numa_hint_faults_local.

I could not figure out a good way to display a graph for foreign faults, so I propose to create numa_hint_faults_foreign and deprecate numa_hint_faults.

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