A runtime heuristic to selectively replicate tasks for application-specific reliability targets


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Subasi O., YALÇIN G. , ZYULKYAROV F., UNSAL O., LABARTA J.

IEEE International Conference on Cluster Computing (CLUSTER), Taipei, Taiwan, 13 - 15 September 2016, pp.498-505 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/cluster.2016.54
  • City: Taipei
  • Country: Taiwan
  • Page Numbers: pp.498-505

Abstract

In this paper we propose a runtime-based selective task replication technique for task-parallel high performance computing applications. Our selective task replication technique is automatic and does not require modification/recompilation of OS, compiler or application code. Our heuristic, we call App_FIT, selects tasks to replicate such that the specified reliability target for an application is achieved. In our experimental evaluation, we show that App_FIT selective replication heuristic is low-overhead and highly scalable. In addition, results indicate that complete task replication is overkill for achieving reliability targets. We show that with App_FIT, we can tolerate pessimistic exascale error rates with only 53% of the tasks being replicated.