Hi all, I posted https://gerrit.ovirt.org/49807, adding vdsm-coverage package, making it easy to get coverage report for functional or system tests. This can also be used to understand which code is touched when performing some flow manually. Once this patch is merged, you can create coverage report like this: 1. Install vdsm-coverage 2. Enable coverage in vdsm.conf: [devel] coverage_enable = true 3. Restart vdsm 4. Run tests or interact with engine 5. Stop vdsm The report is created in /var/run/vdsm/vdsm.coverage To create html report: coverage html --rcfile /etc/vdsm/coverage.conf The view the report, start a web server: cd htmlcov python -m SimpleHTTPServer The report is available now in your favorite browser: http://myhost.example.com:8000/ The manual steps described above can probably be automated, having a web server running and generating coverage report on demand. (hint: patches are welcome) Notes: - On RHEL 7.2, python-coverage is old (3.6). Use pip to install more recent one: pip install -U coverage Note that files generated by coverage 3.6 cannot be processed with coverage 4. - Needs debian packaging Please try and suggest improvements. Nir