Design for a Soft Error Resilient Dynamic Task-based Runtime

TitleDesign for a Soft Error Resilient Dynamic Task-based Runtime
Publication TypeConference Paper
Year of Publication2015
AuthorsCao, C., G. Bosilca, T. Hérault, and J. Dongarra
Conference Name29th IEEE International Parallel & Distributed Processing Symposium (IPDPS)
Date Published05/2015
Conference LocationHyderabad, India

As the scale of modern computing systems grows, failures will happen more frequently. On the way to Exascale a generic, low-overhead, resilient extension becomes a desired aptitude of any programming paradigm. In this paper we explore three additions to a dynamic task-based runtime to build a generic framework providing soft error resilience to task-based programming paradigms. The first recovers the application by re-executing the minimum required sub-DAG, the second takes critical checkpoints of the data flowing between tasks to minimize the necessary re-execution, while the last one takes advantage of algorithmic properties to recover the data without re-execution. These mechanisms have been implemented in the PaRSEC task-based runtime framework. Experimental results validate our approach and quantify the overhead introduced by such mechanisms.