Adaptive ILP control to increase fault tolerance for VLIW processors

Because of technology scaling, soft error rate has been increasing in modern processors, affecting system reliability. To mitigate such effect, we propose an adaptive fault tolerance approach that exploits, at run-time, idle functional units to execute duplicated instructions in a configurable VLIW...

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Bibliographic Details
Main Authors: Sartor, Anderson L., Wong, Stephan, Beck, Antonio C. S.
Format: Conference Proceeding
Language:English
Subjects:
adaptive processor
Fault tolerance
Fault tolerant systems
Hardware
Pipelines
Program processors
Registers
soft errors
VLIW
Online Access:Request full text
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Summary:Because of technology scaling, soft error rate has been increasing in modern processors, affecting system reliability. To mitigate such effect, we propose an adaptive fault tolerance approach that exploits, at run-time, idle functional units to execute duplicated instructions in a configurable VLIW processor. In applications with high Instruction Level Parallelism (ILP) and few functional units available for duplication, it adaptively reschedules instructions according to a configurable threshold, providing a tradeoff between performance and fault tolerance. On average, failure rate is reduced by 89.53%, performance by 5.86%; while energy consumption increases by 72% and area by 22.2%, using a fault tolerance oriented threshold.
ISSN:2160-052X
DOI:10.1109/ASAP.2016.7760767