Arm Streamline lwi_helper.py System Profile Support

Using lwi_helper.py as part of an automation workflow (on a MacBook) to profile an Android application works if the "--package" flag is set to the appropriate debuggable app package name. Does lwi_helper also have support for running a system profile? When running the app profile it appears there are certain counters that do not return data, such as System CPU usage. So far I've only verified that System CPU usage doesn't return data. Is there a way to configure the helper file(s) to run this type of system profile so that system counters can be set and used?