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Method and device for online fault detection of memory

A fault detection and memory technology, applied in the computer field, can solve problems such as equipment that is not suitable for 7×24 hours of uninterrupted work, and achieve the effects of reducing development difficulty, improving timeliness, and simple methods

Active Publication Date: 2015-09-30
TRAFFIC CONTROL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention provides a memory online fault detection method and device to solve the technical problem that the memory detection method in the prior art is not suitable for equipment that works 7×24 hours a day

Method used

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  • Method and device for online fault detection of memory
  • Method and device for online fault detection of memory

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Embodiment Construction

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0048] Embodiments of the present invention firstly provide a method for online fault detection of memory, see figure 1 ,include:

[0049] Step 101: Write the data in the CPU into the working memory and the image memory at the same time.

[0050] Step 102: Perform real-time bit-by-bit comparison of the data written by the CPU into the working me...

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Abstract

The invention provides an online memory fault detecting method and device. The method comprises writing data in a CPU (central processing unit) into a working memory and a mapping memory simultaneously; performing real-time bit-by-bit comparison on the data of the CPU, which are written into the working memory and the mapping memory through a comparing unit; when the memory comparison results are identical, determining the memories work normally; if the memory comparison results are not identical, determining that the memories fail and performing corresponding treatment; writing different data into virtual space outside the memory space and the mapping memory simultaneously through the CPU and performing real-time bit-by-bit comparison through the comparing unit to achieve self-inspection of the comparing unit; when the self-inspection results are identical, determining that the comparing unit fails; when the self-inspection results are not identical, determining that the comparing unit works normally. The online memory fault detecting method improves the timeliness of memory fault detection and reduces the possibility of damage caused by memory faults.

Description

technical field [0001] The invention relates to the technical field of computers, in particular to a memory online fault detection method and device. Background technique [0002] The CPU is often used in industrial control equipment, and the general CPU needs to expand the memory, and the memory is very important as the carrier of the program operation. If a storage unit in the memory fails (referring to constant high level or constant low level), the variable or data stored in the storage unit will not be the expected result, and the CPU will use the wrong variable or data Continuing execution produces erroneous results. For safety products, such errors may lead to serious consequences. For example, when a variable is used to indicate whether a train is overspeed, such errors cannot be allowed to occur. Therefore, it is very necessary to carry out online detection on the memory, to find the fault of the memory in time, and to take necessary solutions. [0003] At presen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/16
Inventor 栾庆文李超
Owner TRAFFIC CONTROL TECH CO LTD
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