SC13 Home > SC13 Schedule > SC13 Presentation - Making GMRES Resilient to Single Bit Flips

SCHEDULE: NOV 16-22, 2013

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Making GMRES Resilient to Single Bit Flips

SESSION: Doctoral Showcase - Early Research Showcase

EVENT TYPE: Doctoral Showcase - Early Research Showcases

TIME: 3:30PM - 5:00PM

SESSION CHAIR: Wojtek James Goscinski

Presenter(s):James J. Elliott

ROOM:601/603

ABSTRACT:
The collective surface area and increasing density of components has led to an increase in the number of observed bit flips. This effort works towards rigorously quantifying the impact of bit flips on floating point arithmetic. We exploit norm bounds to ensure the upper Hessenberg entries constructed in the GMRES algorithm do not exceed theoretical limits. We also combine analytical modeling to show how scaling the inputs to these algorithms mitigate silent faults should they occur. We then combine our upper Hessenberg check, analytical model of bit flip perturbations, and the concept of sandbox reliability to show how scaling data can enhance existing fault tolerant algorithms, namely Fault Tolerant GMRES.

Chair/Presenter Details:

Wojtek James Goscinski (Chair) - Monash University

James J. Elliott - North Carolina State University

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