mirror of https://gitee.com/openkylin/linux.git
58 lines
2.0 KiB
ReStructuredText
58 lines
2.0 KiB
ReStructuredText
.. SPDX-License-Identifier: GPL-2.0
|
|
|
|
=================
|
|
kunit_tool How-To
|
|
=================
|
|
|
|
What is kunit_tool?
|
|
===================
|
|
|
|
kunit_tool is a script (``tools/testing/kunit/kunit.py``) that aids in building
|
|
the Linux kernel as UML (`User Mode Linux
|
|
<http://user-mode-linux.sourceforge.net/>`_), running KUnit tests, parsing
|
|
the test results and displaying them in a user friendly manner.
|
|
|
|
kunit_tool addresses the problem of being able to run tests without needing a
|
|
virtual machine or actual hardware with User Mode Linux. User Mode Linux is a
|
|
Linux architecture, like ARM or x86; however, unlike other architectures it
|
|
compiles the kernel as a standalone Linux executable that can be run like any
|
|
other program directly inside of a host operating system. To be clear, it does
|
|
not require any virtualization support: it is just a regular program.
|
|
|
|
What is a .kunitconfig?
|
|
=======================
|
|
|
|
It's just a defconfig that kunit_tool looks for in the base directory.
|
|
kunit_tool uses it to generate a .config as you might expect. In addition, it
|
|
verifies that the generated .config contains the CONFIG options in the
|
|
.kunitconfig; the reason it does this is so that it is easy to be sure that a
|
|
CONFIG that enables a test actually ends up in the .config.
|
|
|
|
How do I use kunit_tool?
|
|
========================
|
|
|
|
If a kunitconfig is present at the root directory, all you have to do is:
|
|
|
|
.. code-block:: bash
|
|
|
|
./tools/testing/kunit/kunit.py run
|
|
|
|
However, you most likely want to use it with the following options:
|
|
|
|
.. code-block:: bash
|
|
|
|
./tools/testing/kunit/kunit.py run --timeout=30 --jobs=`nproc --all`
|
|
|
|
- ``--timeout`` sets a maximum amount of time to allow tests to run.
|
|
- ``--jobs`` sets the number of threads to use to build the kernel.
|
|
|
|
.. note::
|
|
This command will work even without a .kunitconfig file: if no
|
|
.kunitconfig is present, a default one will be used instead.
|
|
|
|
For a list of all the flags supported by kunit_tool, you can run:
|
|
|
|
.. code-block:: bash
|
|
|
|
./tools/testing/kunit/kunit.py run --help
|