DETOP -- An Interactive Debugger for PowerPC Based Multicomputers

Debugging still is one of the most time consuming phases in programming high performance parallel computers. Parallel debuggers can greatly support users in this process and thus reduce time needed for program development. However, most debuggers either don't provide easy-to-use interfaces and therefore are rejected by lots of potential users, or are usable only for a subclass of applications supported by the machine's programming model. In this article we define design goals for parallel debuggers and present the user interface and implementation of our parallel debugger DETOP. DETOP provides a graphical interface that is simple to use even for unexperienced users and supports not only static data parallel codes, but also dynamic programs and applications based on functional decomposition. DETOP is also an excellent example of cooperation and transfer of technology between universities and industry. 1. Introduction Developments in the field of supercomputing during the last couple of..