Code coverage

CKI provides kernel builds with gcov support and it is possible to trigger CKI pipelines from merge requests on kernel-tests repo to check the coverage of specific test or tests in general.

How to trigger using the CKI bot

• Open a dummy MR on kernel-tests, once the MR is created the CKI bot will add a comment of the options to trigger the test.
• Under Click here for details on how to select the tests to run. there is a list of kernels that can be used, in this case, look at the gcov ones, like [gcov/rhel-8] or [centos-gcov/c9s].
• In the Click here for details on how to adjust the functionality of the retriggered pipeline by replacing the trigger variables of the original pipeline. section there is a list of options to select the tests or architectures to run.

Example how to trigger the bot

@cki-ci-bot please test

- `[skip_beaker=false]`
- `[centos-gcov/c9s]`
- `[architectures=x86_64]`
- `[tests_regex=.*KUNIT.*]`

This will create a CKI pipeline that will execute the test.

Looking the results

Once the pipeline finishes a link to coverage/report/index.html will be shown at the end of the test job of the pipeline.