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Using OSProfiler
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OSProfiler provides a tiny but powerful library that is used by
most (soon to be all) OpenStack projects and their python clients. It
provides functionality to generate 1 trace per request, that goes
through all involved services. This trace can then be extracted and used
to build a tree of calls which can be quite handy for a variety of
reasons (for example in isolating cross-project performance issues).

.. toctree::
   :maxdepth: 2

   background
   api
   integration
   collectors
   similar_projects

Release Notes
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.. toctree::
   :maxdepth: 1

   history
