Difference between: kernel.percpu.cpu.user and kernel.pernode.cpu.user

[Shirshendu Chakrabarti <shirshendu@xxxxxxx>]

Hi PCP team,

Could anyone in the team point me to any literature which explains the difference between a per node metric and percpu metric. The one-liner and extended description are absent in pernode metric case and terse in percpu case.

For example:

[root@pcp-test-shir3 pmlogger]# pminfo -f kernel.percpu.cpu.user

kernel.percpu.cpu.user

  inst [0 or "cpu0"] value 993240

[root@pcp-test-shir3 pmlogger]# pminfo -f kernel.pernode.cpu.user

kernel.pernode.cpu.user

  inst [0 or "node0"] value 0

Â

I was under the assumption that, kernel.pernode.* and kernel.all.* metrics are the same. I am clearly missing something important.

Thanks,

Shirshendu Chakrabarti