What does the non-splunk processes entail in the monitoring console CPU usage by Process?

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Hello,

What does the non-splunk processes entail in the monitoring console CPU usage by Process? I have a virtual machine, and when reviewing the task manager the percentage does not match the all processes said by Splunk. I am hypothesizing that our CPU's are not fully dedicated to the virtual server, and I am trying to better understand the CPU Usage by Process graph.

Also, what do the other parts of the graph symbolize: other, scripted input, search, splunkd server, idle?

Thank you!