In general, System Analyzer provides real-time platform & app analysis capability*. With this utility, developers can easily check the real-time changes on the performance metrics they care (e.g. CPU/GPU loading, media engines usage and power metrics etc.) while interacting with their target test app.
Take the first look about System Analyzer below. Metrics names listed in left panel can be dragged-and-dropped into right view panels for real-time monitoring.