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Single-event soft error reliability calculation method for analyzing DSP software system

A software system and calculation method technology, applied in the field of reliability calculation, reliability calculation, and single-particle soft error reliability calculation of DSP system, which can solve the problems of coarse analysis granularity and ignoring data.

Active Publication Date: 2015-11-18
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

But this method only tracks instructions, but ignores data, and the analysis granularity is too coarse

Method used

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  • Single-event soft error reliability calculation method for analyzing DSP software system
  • Single-event soft error reliability calculation method for analyzing DSP software system
  • Single-event soft error reliability calculation method for analyzing DSP software system

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Embodiment Construction

[0072] Specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0073] The core idea of ​​the present invention is to search for paths based on depth-first search on the divided module topology graph, then use importance sampling to sample all paths, and use sample values ​​to evaluate the reliability of single event soft errors in DSP systems. Therefore, firstly, according to the existing module division method, module division and module topological relationship establishment are carried out; then, depth-first traversal is used to search all paths of module topological relationship; finally, samples are extracted from all paths by importance sampling method, and the sample path is solved The weighted average of DSP system single event soft error reliability is obtained.

[0074] figure 1 For the method flowchart of the present invention, from figure 1 As can be seen, a kind of single event soft...

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Abstract

A single-event soft error reliability calculation method for analyzing a DSP software system is disclosed. The single-event soft error reliability of the DSP software system is calculated by performing module partitioning on the DSP software system, creating topological relations among modules, searching all paths between starting modules and ending modules in the topological relations among the modules by using depth-first search, and extracting a plurality of paths with an importance sampling method. According to the method, a module partitioning and path search based method is adopted for project files; the problem in calculation of probability of outputting a correct result by the DSP system under the single-event effect is solved; part of the paths are selected with the importance sampling method, the paths with great contribution to a whole body are endowed with larger importance weights, and more path samples are extracted from the paths with the larger importance weights, so that the influence of the small-weight paths on the system is inhibited and the calculation efficiency is improved; and the mean value of the extracted samples is unbiased estimation of overall mean value, so that a calculation result is more reliable.

Description

technical field [0001] The present invention relates to a reliability calculation method, in particular to a single event soft error reliability calculation method for analyzing a DSP software system, involving the reliability calculation of a DSP system with single event effects, which can be used to guide and improve system reliability design, and belongs to system reliability field. Background technique [0002] Electronic devices in the aerospace field are often impacted by space high-energy particles and the logic state of the circuit changes. This phenomenon is called the single event effect. Single event effects will pose a great threat to the safety of spacecraft, so people are very concerned about it. In this regard, people hope to obtain the reliability of electronic devices under single event effects. [0003] Currently, there are many papers on how to evaluate the reliability due to single event effects. For example, the paper "Asystematicmethodologytocomputet...

Claims

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Application Information

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IPC IPC(8): G06F11/36
Inventor 王健郭宝龙贾亮闫允一高翔
Owner XIAN INSTITUE OF SPACE RADIO TECH
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