PG RT is an environment for the integration of tools and systems for instrumentation, performance visualization, and analysis of complex real-time systems. A part of PG RT is the Visual Objects framework for rapid prototyping and development of object-oriented, online, adaptive, application-specific performance visualizations. PG RT uses CORBA technology to provide real-time applications and systems with convenient access to visual objects. Many complex visual objects may be distributed over a number of graphical workstations in a local area network to provide rich visualization in real time. The visual objects can be directly accessed from a distributed real-time application, or--- in order to eliminate the intrusion of CORBA to the application---via a distributed instrumentation system called BRISK, which is a component of PG RT . We demonstrate the PG RT environment by instrumenting and visualizing a distributed real-time multimedia application. 1 Introduction An abili...