SCHEDULE: NOV 16-22, 2013
When viewing the Technical Program schedule, on the far righthand side is a column labeled "PLANNER." Use this planner to build your own schedule. Once you select an event and want to add it to your personal schedule, just click on the calendar icon of your choice (outlook calendar, ical calendar or google calendar) and that event will be stored there. As you select events in this manner, you will have your own schedule to guide you through the week.
Making GMRES Resilient to Silent Data Corruption
SESSION: Research Poster Reception
EVENT TYPE: Posters, Electronic Posters, and Education Posters
TIME: 5:15PM - 7:00PM
AUTHOR(S):James J. Elliott, Mark Hoemmen, Frank Mueller
ROOM:Mile High Pre-Function
ABSTRACT:
Increasing parallelism and transistor density, along with increasingly tighter energy and peak power constraints, may force exposure of occasionally incorrect computation or storage to application codes. Silent data corruption (SDC) will likely be infrequent, yet one SDC suffices to make numerical algorithms like iterative linear solvers cease progress towards the correct answer. Thus, we focus on resilience of the iterative linear solver GMRES to a single transient SDC. We derive inexpensive checks to detect the effects of an SDC in GMRES that work for a more general SDC model than presuming a bit-flip. Our experiments show that when GMRES is used as the inner solver of an inner-outer iteration, it can run-through SDC of almost any magnitude in the computationally intensive orthogonalization phase. That is, it gets the right answer using faulty data without any required roll back. Those SDCs, which it cannot run-through, get caught by our detection scheme.
Chair/Author Details:
James J. Elliott - North Carolina State University
Mark Hoemmen - Sandia National Laboratories
Frank Mueller - North Carolina State University
Click here to download .ics calendar file
