CPU usage does not match the CPU usage in Task Manager

Elastic Stack Beats
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The metricbeat system module should use GetSystemTimes instead of NtQuerySystemInformation for calculating cpu usage. Or using performance counters. As a workaround you could create following windows module

- module: windows
  metricsets: ["perfmon"]
  enabled: true
  period: 1s
  perfmon.counters:
  - instance_label: processor.time
    measurement_label: processor.time.total.pct
    query: '\Processor(_Total)\% Processor Time'

and check if the value match with the one from taskmanager.

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