Scipediacontent: Scipediacontent moved page Draft Content 179126669 to Lemieux et al 2013a

2021-02-03T18:01:21Z

Scipediacontent moved page Draft Content 179126669 to Lemieux et al 2013a

Scipediacontent: Created page with " == Abstract == Overclocking a CPU is a common practice among home-built PC enthusiasts where the CPU is operated at a higher frequency than its speed rating. This practice i..."

2021-02-03T18:01:17Z

Created page with " == Abstract == Overclocking a CPU is a common practice among home-built PC enthusiasts where the CPU is operated at a higher frequency than its speed rating. This practice i..."

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== Abstract ==

Overclocking a CPU is a common practice among home-built PC enthusiasts where the CPU is operated at a higher frequency than its speed rating. This practice is unsafe because timing errors cannot be detected by modern CPUs and they can be practically undetectable by the end user. Using a timing speculation technique such as Razor, it is possible to detect timing errors in CPUs. To date, Razor has been shown to correct only unidirectional, feed-forward processor pipelines. In this paper, we safely overclock 2D arrays by extending Razor correction to cover bidirectional communication in a tightly coupled or lockstep fashion. To recover from an error, stall wavefronts are produced which propagate across the device. Multiple errors may arise in close proximity in time and space; if the corresponding stall wavefronts collide, they merge to produce a single unified wavefront, allowing recovery from multiple errors with one stall cycle. We demonstrate the correctness and viability of our approach by constructing a proof-of-concept prototype which runs on a traditional Altera FPGA. Our approach can be applied to custom computing arrays, systolic arrays, CGRAs, and also time-multiplexed FPGAs such as those produced by Tabula. As a result, these devices can be overclocked and safely tolerate dynamic, data-dependent timing errors. Alternatively, instead of overclocking, this same technique can be used to `undervolt' the power supply and save energy.

== Original document ==

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

* [http://www.ece.ubc.ca/~lemieux/publications/brant-fccm2013.pdf http://www.ece.ubc.ca/~lemieux/publications/brant-fccm2013.pdf]

* [http://www.ece.ubc.ca/~lemieux/publications/brant-fccm2013.pdf http://www.ece.ubc.ca/~lemieux/publications/brant-fccm2013.pdf],
: [https://dblp.uni-trier.de/db/conf/fccm/fccm2013.html#BrantASTYL13 https://dblp.uni-trier.de/db/conf/fccm/fccm2013.html#BrantASTYL13],
: [https://dl.acm.org/citation.cfm?id=2495653 https://dl.acm.org/citation.cfm?id=2495653],
: [https://ieeexplore.ieee.org/document/6545992 https://ieeexplore.ieee.org/document/6545992],
: [https://academic.microsoft.com/#/detail/2067418954 https://academic.microsoft.com/#/detail/2067418954]

* [http://xplorestaging.ieee.org/ielx7/6545868/6545974/06545992.pdf?arnumber=6545992 http://xplorestaging.ieee.org/ielx7/6545868/6545974/06545992.pdf?arnumber=6545992],
: [http://dx.doi.org/10.1109/fccm.2013.63 http://dx.doi.org/10.1109/fccm.2013.63]

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Lemieux et al 2013a - Revision history

Scipediacontent: Scipediacontent moved page Draft Content 179126669 to Lemieux et al 2013a

Scipediacontent: Created page with " == Abstract == Overclocking a CPU is a common practice among home-built PC enthusiasts where the CPU is operated at a higher frequency than its speed rating. This practice i..."