The LISA project provides a toolkit that supports regression testing and interactive analysis of Linux kernel behavior. LISA stands for Linux Integrated/Interactive System Analysis. LISA's goal is to help Linux kernel developers to measure the impact of modifications in core parts of the kernel. The focus is on the scheduler (e.g. EAS), power management and thermal frameworks. However LISA is generic and can be used for other purposes too.
LISA has a host/target model. LISA itself runs on a host machine,
and uses the
devlib <https://github.com/ARM-software/devlib>__ toolkit
to interact with the target via SSH, ADB or telnet. LISA is flexible
with regard to the target OS; its only expectation is a Linux
kernel-based system. Android, GNU/Linux and busybox style systems have
all been used.
LISA provides features to describe workloads (notably using
rt-app <https://github.com/scheduler-tools/rt-app>__) and run them on targets. It can
collect trace files from the target OS (e.g. systrace and ftrace traces). These
traces can then be parsed and analysed in order to examine detailed target
behaviour during the workload's execution.
Some LISA features may require modifying the target OS. For example, in order to collect ftrace files the target kernel must have CONFIG_DYNAMIC_FTRACE enabled.
There are two "entry points" for running LISA:
Jupyter/IPython notebook framework <http://jupyter.org/>__.
This allows LISA to be used interactively and supports visualisation
of trace data. Some notebooks are provided with example and
ready-made LISA use-cases.
Via the automated test framework. This framework allows the
development of automated pass/fail regression tests for kernel behaviour.
LISA provides some ready-made automated tests under the
The main goals of LISA are:
Support study of existing behaviours (i.e. "how does PELT work?")
Support analysis of new code being developed (i.e. "what is the impact on existing code?")
Get insights on what's not working and possibly chase down why
Share reproducible experiments by means of a common language that:
You should find everything on
Here are some noteworthy sections:
Kernel tests <https://lisa-linux-integrated-system-analysis.readthedocs.io/en/master/kernel_tests.html>__
Bug reports should be raised against the
GitHub issue tracker <https://github.com/ARM-software/lisa/issues>__.
Linux Integrated System Analysis (LISA) & Friends
.. video title: LAS16-TR04: Using Tracing to tune and optimize EAS English
Note: the LISA classes referred by the slides are outdated, but all the other concepts and the overall architecture stays the same.
Some insights on what it takes to have reliable tests:
.. video title: Scheduler behavioural testing
This project is licensed under Apache-2.0.
This project includes some third-party code under other open source
licenses. For more information, see
Contributions are accepted under Apache-2.0. Only submit contributions
where you have authored all of the code. If you do this on work time
make sure your employer is cool with this. We also have a
Contributor Guide <https://lisa-linux-integrated-system-analysis.readthedocs.io/en/master/contributors_guide.html>__
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