doc: add tracing section

   c_library

   dfu

   logging/index

   tracing/index

   mgmt

   networking/networking.rst

   power_management.rst

.. _tracing:

Tracing

#######

Overview

********

The tracing feature provides hooks that permits you to collect data from

your application and allows enabled backends to visualise the inner-working of

the kernel and various subsystems.

Applications and supported tools can define empty macros declared in

:file:`include/tracing.h` that are called across the kernel in key spots.

SEGGER SystemView Support

*************************

Zephyr provides built-in support for `SEGGER SystemView`_ that can be enabled in

any application for platforms that have the required hardware support.

To enable tracing support with `SEGGER SystemView`_ add the configuration option

:option:`CONFIG_SEGGER_SYSTEMVIEW` to your project configuration file and set

it to *y*. For example, this can be added to the

:ref:`dining-philosophers-sample` to visualize fast switching between threads.

.. _SEGGER SystemView: https://www.segger.com/products/development-tools/systemview/