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...

We present a new software technology for on-line performance analysis and visualization of complex parallel and distributed systems. Often heterogeneous, these systems need capabilities for flexible integration and configuration of performance analysis and visualization. Our technology is based on an object-oriented framework for rapid prototyping and development of distributable visual objects. The visual objects consist of two levels, a platform/device-specific low level, and an analysis- and visualization-specific high level. We have developed a very high-level, markup language, called VOML, and a compiler for component-based development of high-level visual objects. The VOML is based on a software architecture for on-line event processing and performance visualization called EPIRA. The technology lends itself to constructing high-level visual objects from globally distributed component definitions. We present details of the technology and tools used, and show how an example visual object can be rapidly prototyped from several reusable components. 1