Memory management method and system

Abstract

The invention discloses a memory management method. The method comprises the following steps of: creating a memory pool comprising a plurality of memory groups, wherein the memory blocks in the same memory group are the same in size and idle memory blocks are sequentially linked into an idle memory linked list, and memory blocks in different memory groups are different in size; selecting a first memory group according to the size of a requested memory when a memory allocation request is received, and allocating a first memory block in the idle memory linked list of the selected first memory group to a memory requester; and selecting a second memory group according to the address of a memory required to be released when a memory release request is received, and linking the memory block which is required to be released and is taken as the first memory block into the idle memory linked list of the second memory group. The embodiment of the invention also provides a corresponding memory management system. In the method disclosed by the invention, the memory is allocated or released in the corresponding memory group, thus no memory fragment is produced and the memory allocation efficiency can be improved.

Description

technical field [0001] The invention relates to the technical field of computers, in particular to a memory management method and system. Background technique [0002] At present, embedded system applications have penetrated into various fields of our lives. Mobile phones, set-top boxes, MP4 players, switches, routers, etc. can all be attributed to embedded devices. Among these embedded devices, some devices require powerful and real-time operating systems. VxWorks launched by American Wind River System Company (namely WRS Company) is the leader of this type of operating system. VxWorks is a real-time operating system, and its application examples include the famous Mars exploration vehicle, Patriot missile and so on. Since VxWorks 5.4 entered China for more than ten years, it has presented the characteristics of multi-framework, wide application range, and civilian use. More and more embedded devices have turned to VxWorks for implementation. [0003] In order to improve...

AI Technical Summary

Problems solved by technology

Long-term uninterrupted application and release of memory will inevitably generate a large number of memory fragments in the end, which not only affects the time required to apply for memory, but also leads to memory exhaustion. There is not enough free memory for large memory allocation.

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