.. _nrf_desktop_cpu_meas:

CPU measurement module
######################

.. contents::
   :local:
   :depth: 2

Use the CPU measurement module to monitor CPU load.

Module events
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.. include:: ../../../../../../../applications/nrf_desktop/doc/event_propagation.rst
    :start-after: table_cpu_meas_start
    :end-before: table_cpu_meas_end

.. note::
    |nrf_desktop_module_event_note|

Configuration
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Enable the module using the :ref:`CONFIG_DESKTOP_CPU_MEAS_ENABLE <config_desktop_app_options>` option.
This Kconfig option selects the :kconfig:option:`CONFIG_CPU_LOAD` option.
The :kconfig:option:`CONFIG_CPU_LOAD` option enables :ref:`cpu_load`, that is used to perform the measurements.

Set the time between subsequent CPU load measurements, in milliseconds, using the :ref:`CONFIG_DESKTOP_CPU_MEAS_PERIOD <config_desktop_app_options>` option.

Implementation details
**********************

The module periodically submits the measured CPU load as :c:struct:`cpu_load_event` and resets the measurement.
The event can be displayed in the logs or using the :ref:`nrf_profiler`.
The :c:member:`cpu_load_event.load` presents the CPU load in 0.001% units.