Memory management method of embedded system

Abstract

The invention relates to a memory management method of an embedded system, which comprises the steps of: (1), opening up a physical memory, managing the physical memory by using a turnover thread heap management system, and allocating a memory space for data requirement from the tail end and the head end of a thread heap free memory by the thread heap management system, wherein the thread heap free memory has a normal state N and a turnover state F; (2), dividing all data requirements into a temporary space requirement and an output space requirement, and allocating one end of the thread heap free memory to be a temporary end or an output end by a type thread heap management system according to the data requirements; (3), allocating a head end memory to data required in a temporary space by the thread heap management system; and (4), when a superior function calls a subordinate function, controlling the thread heap free memory to turn over by the thread heap management system, when exiting the subordinate function, releasing a temporary space at the current temporary end, preserving the output space of the output end and merging with the temporary space of the temporary end of the superior function. The invention can realize timely release of the memory, has high operating efficiency, does not generate memory fragments, and can operate stably and efficiently for a long time.

Description

technical field [0001] The invention relates to an embedded system, in particular to a memory management method of the embedded system. Background technique [0002] The application fields of embedded systems are very extensive, and the functions of the application programs are also very rich. However, due to its very limited computing power and storage capacity, applications running on embedded systems must have efficient and reliable memory management methods in order to run stably for a long time. The operating system used on embedded devices can also provide a basic memory management mechanism, but for applications that need to run stably for a long time and repeatedly apply for memory space, the basic memory management mechanism of the operating system cannot meet the requirements . [0003] Theoretically speaking, in the process of memory allocation, if sequential use and reverse release can be realized, the memory can be released in time after use without memory fra...

AI Technical Summary

Problems solved by technology

However, in general applications, the memory requirements of the program are very complex, and the timely release of memory is a big problem

Existing memory pool management methods and memory garbage collection mechanisms can partially solve this problem, but after a long period of use, there will generally be a large number of memory fragments and negative effects such as reduced allocation efficiency

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