Method for enhancing reliability of program of multi-replica contrast mechanism based on code segment

Abstract

The invention discloses a method for enhancing the reliability of a program of a multi-replica contrast mechanism based on a code segment. In the method, an kernel thread is started as an initialization thread, the initialization thread obtains a process memory information, two replicas of a process code segment are stored in a physical memory, the process code segment is also divided into memory domains with the fixed size, the kernel threads with a corresponding amount are started as a consistency maintenance thread to maintain the consistency of a process code domain and a replica thereof in real time according to a division result, and program code segment errors caused by various software and hardware faults are discovered and recovered in time. The invention is simple to realize, is transparent to a protected process and can efficiently detect the program code segment errors, thereby preventing program crash and even system invalidation caused by the code segment errors and improving the operation reliability of the program.

Description

technical field [0001] The invention belongs to the field of computers and relates to computer fault-tolerant technology, in particular to a method for improving program reliability based on a multi-copy comparison mechanism of code segments. Background technique [0002] With the development of the Internet and the continuous popularization and deepening of computer applications, various industries and applications have higher and higher requirements for the reliability of computer systems. In particular, there are more and more high-end and business-critical applications, and system reliability issues have become increasingly prominent. In modern businesses, server downtime is one of the leading causes of lost profits. It can be seen that how to ensure the reliability of business systems is very important for organizations that need to provide users with uninterrupted services or need to ensure information security. Fault-tolerant computers and related technologies emerg...

AI Technical Summary

Problems solved by technology

[0004] 1) Cannot detect code segment changes due to transient faults

[0005] The virtual memory protection mechanism provided by the processor can only detect abnormalities caused by illegal reading and writing of code segments by the program, but cannot detect the reading and writing of code segments caused by transient faults.

Code segment changes such as memory cell bit inversions due to processor overheating are undetectable

[0006] 2) The impact of the development of hardware technology on computer systems is not considered

[0007] In recent years, the integrated circuit manufacturing process has gradually developed to the nanometer level. The reduction of the feature size of the underlying integrated circuit, the reduction of the power supply voltage and the increase of the frequency make the processor more sensitive to various noise interference, so it is more prone to hardware transient failures

These transient faults may cause the code segment of the computer program to be modified, which may eventually lead to service failure or even the overall failure of the system

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