Asynchronous and exact forward recovery for detected errors in iterative solvers
Rights accessOpen Access
European Commisision's projectEC-FP7-321253
Current trends and projections show that faults in computer systems become increasingly common. Such errors may be detected, and possibly corrected transparently, e.g. by Error Correcting Codes (ECC). For a program to be fault-tolerant, it needs to also handle the Errors that are Detected and Uncorrected (DUE), such as an ECC encountering too many bit flips in a codeword. While correcting an error has an overhead in itself, it can also affect the progress of a program. The most generic technique, rolling back the program state to a previously taken checkpoint, sets back any progress done since then. Alternately, application specific techniques exist, such as restarting an iterative program with its latest iteration's values as initial guess.
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CitationJaulmes, L., Casas, M., Moreto, M., Ayguade, E., Labarta, J., Valero, M. Asynchronous and exact forward recovery for detected errors in iterative solvers. "IEEE transactions on parallel and distributed systems", 19 Març 2018, vol. 29, núm. 9, p. 1961-1974