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Monitoring reliability of a digital system

一种数字系统、可靠性的技术，应用在数字电路测试、仪器、测量装置等方向，能够解决性能或可靠性降级、不引人注意、计算与数据未被发现等问题

Active Publication Date: 2010-03-10
KYNDRYL INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While catastrophic failures of digital systems are easy to identify, "soft" failures (i.e., significant degradations in digital system performance or reliability) may go unnoticed, which means that such aging of digital systems can lead to undetected errors in calculations and data. Difficult to recover from errors

Method used

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  • Monitoring reliability of a digital system
  • Monitoring reliability of a digital system
  • Monitoring reliability of a digital system

Examples

Experimental program
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Embodiment Construction

[0027] As described above, there is provided a monitoring system and method for actively tracking the aging and reliability of a particular digital system and issuing a warning signal if, for example, the degradation of the monitoring system exceeds a pre-specified threshold. "Digital system" means any digital system or circuit comprising, for example, a processor, as well as simple or complex non-processor-based digital circuits, memory, and the like. As a specific example, the digital system is a microprocessor, and the specified threshold is a predefined acceptable level of the maximum operating frequency of the digital system.

[0028]Specifically, provided herein is a technique for monitoring the reliability of a digital system employing one or more ring oscillator sensors implemented with (eg, embedded in) the digital system. In one embodiment, one or more ring oscillator sensors are integrated into the available space of the digital system. As a specific example, a dig...

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Abstract

System and method are provided for continually monitoring reliability, or aging, of a digital system and for issuing a warning signal if digital system operation degrades past a specified threshold. The technique includes implementing a ring oscillator sensor in association with the digital system, wherein logic and / or device percent composition of the ring oscillator sensor mirrors percent composition thereof within the digital system. Counter logic is coupled to the ring oscillator sensor for converting outputted count signals to an oscillation frequency, and control logic is coupled to thecounter logic for periodically evaluating oscillation frequency of the ring oscillator sensor and generating a warning signal indicative of reliability degradation if at least one of: (i) a measured or estimated oscillation frequency is below a warning threshold frequency; or (ii) a measured or estimated rate of change in a difference between measured oscillation frequencies exceeds an acceptablerate of change threshold.

Description

technical field [0001] The present invention relates generally to the field of fault prediction, and in particular, the present invention relates to ring oscillator sensor based reliability measurement systems and methods for digital systems. Background technique [0002] The failure rate of the components making up a digital system such as an integrated circuit (or a larger system) is fundamentally related to various parameters including operating temperature as well as the size and interconnection geometry of the digital system. While built-in tests for digital systems attempt to predict the lifetime of a given type of digital system, they do not provide aging information for each specific digital system of the type manufactured. Currently, customers or users are only informed about problems with digital systems after a major system failure. While catastrophic failures of digital systems are easy to identify, "soft" failures (i.e., significant degradations in digital syst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/317G01R31/3193
CPCG01R31/31725G01R31/31937G01R31/317G01R31/3193
Inventor 金大益金钟海金文柱J·R·姆利克宋红花
Owner KYNDRYL INC