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Fault-tolerant average execution time optimization for general-purpose multi-processor system-on-chips

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3 Author(s)
Vayrynen, M. ; Dept. of Comput. Sci., Linkoping Univ., Linkoping ; Singh, V. ; Larsson, E.

Fault-tolerance is due to the semiconductor technology development important, not only for safety-critical systems but also for general-purpose (non-safety critical) systems. However, instead of guaranteeing that deadlines always are met, it is for general-purpose systems important to minimize the average execution time (AET) while ensuring fault-tolerance. For a given job and a soft (transient) error probability, we define mathematical formulas for AET that includes bus communication overhead for both voting (active replication) and rollback-recovery with checkpointing (RRC). And, for a given multi-processor system-on-chip (MPSoC), we define integer linear programming (ILP) models that minimize AET including bus communication overhead when: (1) selecting the number of checkpoints when using RRC, (2) finding the number of processors and job-to-processor assignment when using voting, and (3) defining fault-tolerance scheme (voting or RRC) per job and defining its usage for each job. Experiments demonstrate significant savings in AET.

Published in:

Design, Automation & Test in Europe Conference & Exhibition, 2009. DATE '09.

Date of Conference:

20-24 April 2009

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