MAR 12, 2015 9:25 AM PDT

Systems-on-a-chip could lower hospital costs and device replacement rates

WRITTEN BY: Robert Woodard
Desyre design for fault-tolerant systems-on-chip
Systems-on-a-chip for extremely critical applications would use 28 percent less energy and 48 percent less chip area while offering nine times lower hardware failure rate, if designed with the completely novel Desyre architecture. This would drastically reduce hospital costs and replacement rate of medical devices.

Three years ago, the DeSyRe (on-Demand System Reliability) project started with the promise that it would enable extremely reliable medical devices. Three years later, the results are in and they are even better than expected: chips designed based on the new Desyre paradigm are shown to be more reliable and to be less power- and area-hungry than predicted at project onset.

The Desyre consortium had initially promised new design techniques that would counter the increasing fault-rates expected for next technology nodes, while at the same time they would reduce the power and performance penalties introduced by fault-tolerance measures.

To reach such ambitious goals, Desyre introduced a different, hybrid approach to reliability, which separates the system-on-chip into two different areas. One area comprises normal, interchangeable processing cores, which are by nature fault-prone. The second area is extremely resistant to faults and monitors the sanity of the cores in the first area. It assures that each core in that area can handle an assigned sub-task correctly and efficiently, yet transfers tasks from one core to other idling cores in this same area in case of a diagnosed malfunction.

"In the Desyre project, we have coupled a new dynamically reconfigurable substrate together with runtime-system software support in such a manner that it can adapt on demand to various types and densities of faults, system constraints and application requirements, " says Ioannis Sourdis, Associate Professor in Computer Engineering at Chalmers University of Technology, and project leader of Desyre. "We compared the Desyre architecture to prevailing reliability approaches, and Desyre scored better on all aspects. It even scored better than we planned at the start of the project, surpassing all our expectations."

When comparing the Desyre system to a standard Triple-Modular-Redundancy system (TMR; a system which compares the output of three identical modules and then trusts the "majority vote"), a Desyre system requires 46% less chip area and 28% less energy to achieve the same tolerance to transient faults and the same performance as a typical TMR system.

Alternatively, when comparing it to a time-redundant system (the program runs twice and the outcome is compared), Desyre executes code 14% to 32% faster.
Last but not least, when looking at permanent faults and comparing the Desyre system with a core-redundant system of the same area (a system in which everything is implemented with a back-up spare part; the back-up takes over in case of malfunctioning), Desyre reduces the number of failures (due to permanent faults) in a billion device hours (FIT) by a factor 9.

Source: Chalmers University of Technology
About the Author
You May Also Like
OCT 04, 2020
Cardiology
The Genetics of Body Fat May Shape Health Risks
OCT 04, 2020
The Genetics of Body Fat May Shape Health Risks
The work may help explain why men and women are at risk for different diseases and often respond to different treatments ...
OCT 07, 2020
Genetics & Genomics
Researchers Confirm Cerebral Palsy Has a Genetic Component
OCT 07, 2020
Researchers Confirm Cerebral Palsy Has a Genetic Component
Scientists have confirmed previous studies that have suggested that some cases of cerebral palsy are due to a genetic mu ...
OCT 21, 2020
Cancer
Can Excess Fructose Cause Liver Cancer?
OCT 21, 2020
Can Excess Fructose Cause Liver Cancer?
Hepatocellular carcinoma, aka liver cancer, is an ever-increasing issue in the western world. While the lion’s sha ...
OCT 22, 2020
Health & Medicine
Vaping of Nicotine and Cannabis Mirror Each Other in Young People
OCT 22, 2020
Vaping of Nicotine and Cannabis Mirror Each Other in Young People
A new study has looked at whether nicotine and cannabis vaping follow similar trajectories from adolescence through to y ...
OCT 22, 2020
Health & Medicine
OCD Symptoms Show Improvement With Cannabis Use
OCT 22, 2020
OCD Symptoms Show Improvement With Cannabis Use
Obsessive-compulsive order symptoms could be eased by cannabis according to a study published in the Journal of Affectiv ...
OCT 25, 2020
Cell & Molecular Biology
Revealing More About the Genetics of Ewing Sarcoma
OCT 25, 2020
Revealing More About the Genetics of Ewing Sarcoma
Ewing sarcoma is a rare kind of cancer that tends to impact young people and occurs in bones or the tissue around them. ...
Loading Comments...