Dynamic Power Redistribution in Failure Prone CMPs

Abstract : Future chip multiprocessors (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 overprovisioned with respect to the deconfigured functionality. We 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. This additional power is dynamically transferred to portions of the multi-core chip that can realize a performance boost from turning on previously dormant microarchitectural features. We demonstrate that a realistic PowerTransfer manager achieves chip-wide performance improvements of up to 25% compared to architectures that simply deconfigure faulty units without regard to the resulting inefficiency.
Type de document :
Communication dans un congrès
John Carter and Karthick Rajamani. WEED 2010 - Workshop on Energy-Efficient Design, Jun 2010, Saint Malo, France. 2010
Liste complète des métadonnées

Littérature citée [12 références]  Voir  Masquer  Télécharger

https://hal.inria.fr/inria-00492867
Contributeur : Ist Rennes <>
Soumis le : jeudi 17 juin 2010 - 13:10:58
Dernière modification le : lundi 20 juin 2016 - 14:10:32
Document(s) archivé(s) le : lundi 20 septembre 2010 - 16:56:20

Fichier

WEED-petricia.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

  • HAL Id : inria-00492867, version 1

Collections

Citation

Paula Petrica, Jonathan A. Winter, David H. Albonesi. Dynamic Power Redistribution in Failure Prone CMPs. John Carter and Karthick Rajamani. WEED 2010 - Workshop on Energy-Efficient Design, Jun 2010, Saint Malo, France. 2010. 〈inria-00492867〉

Partager

Métriques

Consultations de la notice

98

Téléchargements de fichiers

65