Premium Capacity Metrics for Power BI Report Server

So you could use the Windows Performance Monitor to capture logs for the overall server resource usage such as CPU, Memory, Disk and Network usage. But to allocate that to specific reports is not really possible. There would be some information in the ExecutionLog3 view in the Report Server database. And you could potentially trace some of the SSAS profiler events to get detailed usage. but the problem with that is that Report Server dynamically loads and unloads report models on demand and the databases get hydrated with GUIDs for names and I don't know of any way of easily correlating those back to a given report.