Scipediacontent: Scipediacontent moved page Draft Content 362953918 to Soman Jones 2017a

2021-02-01T20:23:01Z

Scipediacontent moved page Draft Content 362953918 to Soman Jones 2017a

Scipediacontent: Created page with " == Abstract == Processor designers face the challenge of defect formation, leading to permanent faults, during fabrication and operation. Permanent or hard fault tolerance i..."

2021-02-01T20:22:54Z

Created page with " == Abstract == Processor designers face the challenge of defect formation, leading to permanent faults, during fabrication and operation. Permanent or hard fault tolerance i..."

New page

== Abstract ==

Processor designers face the challenge of defect formation, leading to permanent faults, during fabrication and operation. Permanent or hard fault tolerance is an important problem in computing systems, solutions to which can help improve yield during fabrication and reduce the cost of transistor mortality during the service life of the processor. This paper presents PreFix, a method to handle hard errors to keep a faulty core running and correctly executing instructions. Instead of turning off faulty structures, PreFix predicts early on whether an instruction is likely to use faulty components, then refines this prediction later in the pipeline to actually detect when an error has occurred. Instructions marked as possibly- faulty in the front-end are queued for duplicate execution on a separate core. At commit, results from the original and duplicate instructions are compared. Upon a mismatch, the original instruction is patched up, the pipeline flushed and execution continues. Using PreFix, faulty components can continue performing useful work when their errors do not manifest in architecturally visible state changes. This enhances processor lifetime with minimal performance overhead.

== Original document ==

The different versions of the original document can be found in:

* [https://www.repository.cam.ac.uk/bitstream/1810/274495/1/soman17-dft.pdf https://www.repository.cam.ac.uk/bitstream/1810/274495/1/soman17-dft.pdf]

* [https://www.repository.cam.ac.uk/handle/1810/274495 https://www.repository.cam.ac.uk/handle/1810/274495]

* [http://xplorestaging.ieee.org/ielx7/8227263/8244422/08244459.pdf?arnumber=8244459 http://xplorestaging.ieee.org/ielx7/8227263/8244422/08244459.pdf?arnumber=8244459],
: [http://dx.doi.org/10.1109/dft.2017.8244459 http://dx.doi.org/10.1109/dft.2017.8244459]

* [https://www.repository.cam.ac.uk/handle/1810/274495 https://www.repository.cam.ac.uk/handle/1810/274495],
: [https://dblp.uni-trier.de/db/conf/dft/dft2017.html#Soman017 https://dblp.uni-trier.de/db/conf/dft/dft2017.html#Soman017],
: [http://doi.ieeecomputersociety.org/10.1109/DFT.2017.8244459 http://doi.ieeecomputersociety.org/10.1109/DFT.2017.8244459],
: [https://academic.microsoft.com/#/detail/2783888117 https://academic.microsoft.com/#/detail/2783888117]

DOIS: 10.17863/cam.21614 10.1109/dft.2017.8244459

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Soman Jones 2017a - Revision history

Scipediacontent: Scipediacontent moved page Draft Content 362953918 to Soman Jones 2017a

Scipediacontent: Created page with " == Abstract == Processor designers face the challenge of defect formation, leading to permanent faults, during fabrication and operation. Permanent or hard fault tolerance i..."