Fault-tolerant systems design-estimating cache contents and usage

Some, Raphael; Beahan, John; Khanoyan, Garen; Callum, L.; Agrawal, A.

doi:10.1109/aero.2002.1035380

Cited by 8 publications

(2 citation statements)

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“…Fourteen (14) key points were monitored and logged. While the overall end-to-end times are the times needed to support the Availability and Reliability models, intermediate times are logged to identify segments of the recovery process which could be optimized for improved system performance.…”

Section: Linux O/smentioning

confidence: 99%

“…The ST8 DM project is the only the current incarnation of the long-held desire to fly COTS in space. Many DM system concepts are based on related technologies developed and demonstrated over past three decades on several DARPA (Defense Advanced Research Projects Agency), NASA, and DoD programs such as Space Touchstone [8], Remote Exploration and Experimentation (REE) [10,12,13,14], Improved Space Computer Project/Improved Space Architecture Concept (ISCP/ISAC), Advanced Onboard Signal Processor (AOSP) [17], Advanced Architecture for Onboard Processing (AAOP), ARGOS [9], and others. All of these programs had the goal of putting high performance processing in space.…”

Section: Dm Flight Hardwarementioning

confidence: 99%

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High Performance Dependable Multiprocessor II

Ramos

Samson

Lupia

et al. 2007

2007 IEEE Aerospace Conference

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With the ever-increasing demand for higher bandwidth and processing capacity of today's space exploration, space science, and defense missions, the ability to efficiently apply Commercial-Off-The-Shelf (COTS) processors for on-board computing has become a critical need. In response to this need, NASA's New Millennium Program (NMP) office commissioned the development of Dependable Multiprocessor (DM) technology for use in science and autonomy missions, but the technology is also applicable to a wide variety of DoD missions. The goal of the DM project is to provide spacecraft/payload processing capability 10x -100x what is available today, enabling heretofore unrealizable levels of science and autonomy. DM technology is being developed as part of the NMP ST8 (Space Technology 8) project. The objective of this NMP ST8 effort is to combine high-performance, fault tolerant, COTS-based cluster processing and fault tolerant middleware in an architecture and software framework capable of supporting a wide variety of mission applications. Dependable Multiprocessor development is continuing as one of the four selected ST8 flight experiments planned to be flown in 2009. 1, 2, 3There are three key problems that need to be overcome in order to fly COTS in space: 1) an effective approach for handling SEUs (Single Event Upsets) in high performance cluster processors, 2) handling thermal issues associated with state-of-the-art COTS components, and 3) achieving high power efficiency (throughput per watt). DM technology solves all three problems. DM solves the SEU problem by combining cluster management software with SEU tolerance-enhancing software in a flexible, efficient, integrated DM middleware suite. DM solves the thermal 1 1-4244-The project formerly was known as the Environmentally-Adaptive FaultTolerant Computing (EAFTC) project. issue by mining the ruggedized, conductive-cooled, COTS airborne embedded processing domain. DM solves the power efficiency problem by mining the high performance, low power mobile computing processing domain.Recently, the DM project successfully passed several key NMP ST8 project milestones: the TRL5 (Technology Readiness Level 5) technology validation demonstration, the Experiment Preliminary Design Review, and the NASA Non Advocate Review. Passing the TRL5 milestone qualified the DM project for advancement to flight system development status. The ST8 project has passed its Preliminary Design and Confirmation Reviews and is now moving into the Implementation Phase.This paper describes the DM technology, the technology validation experiments and demonstrations achieved to date, the plans for the TRL6 technology validation effort, and the plans for the TRL7 flight validation, and provides an update on the status of the project TABLE OF CONTENTS

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Section: Linux O/smentioning

confidence: 99%