Monitor I gathers data for this report automatically. If you want to suppress gathering, you need to specify NOCPU.
REPORTS(CPU)
This report is also available in XML output format. Topic How to work with Postprocessor XML reports in the z/OS RMF User's Guide provides all required information on how to produce and view XML reports.
http://ddshost:8803/gpm/rmfpp.xml?reports=CPU