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doc/user.rst: add section about profiling MPD

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Max Kellermann 2021-02-07 21:38:24 +01:00
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@ -1188,6 +1188,34 @@ Your bug report should contain:
* relevant portions of the log file (:option:`--verbose`) * relevant portions of the log file (:option:`--verbose`)
* be clear about what you expect MPD to do, and what is actually happening * be clear about what you expect MPD to do, and what is actually happening
.. _profiler:
Too Much CPU Usage
^^^^^^^^^^^^^^^^^^
If you believe MPD consumes too much CPU, `write a bug report
<https://github.com/MusicPlayerDaemon/MPD/issues>`_ with a profiling
information.
On Linux, this can be obtained with :program:`perf` (on Debian,
installed the package :file:`linux-perf`), for example::
perf record -p `pidof mpd`
Run this command while MPD consumes much CPU, let it run for a minute
or so, and stop it by pressing ``Ctrl-C``. Then type::
perf report >mpd_perf.txt
Upload the output file to the bug report.
.. note::
This requires having debug symbols for MPD and all relevant
libraries. See :ref:`crash` for details.
.. _crash:
MPD crashes MPD crashes
^^^^^^^^^^^ ^^^^^^^^^^^