Dynamic Power Redistribution in Failure Prone CMPs

Provided by: Cornell University
Topic: Hardware
Format: PDF
Future Chip Multi-Processors (CMPs) will be capable of deconfiguring faulty units in order to permit continued operation in the presence of wear-out failures. However, the unforeseen downside is pipeline imbalance due to other portions of the pipeline now being over provisioned with respect to the deconfigured functionality. The authors propose PowerTransfer, a novel CMP architecture that dynamically redistributes the chip power under pipeline imbalances that arise from deconfiguring faulty units. Through rebalancing - achieved by temporary, symbiotic deconfiguration of additional functionality within the degraded core - power is harnessed for use elsewhere on the chip.

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