Visualization of Open Community Runtime Task Graphs

The emergence of new types of high performance hardware also drives the need for new programming models. The Open Community Runtime (OCR) proposal uses a task-based programming model to target some of these architectures. In OCR, the whole program from start to end needs to be expressed using tasks and synchronized using task-to-task dependences, significantly limiting the applicability and usefulness of existing approaches to application development and debugging. In this paper, we present our approach to visualizing tasks and their synchronization, based on trace data from application execution. This way, the application developer may compare the intended organization of the tasks with the actual dependences as they are seen by the OCR runtime system.