Fixed EMS memory management method

Abstract

The invention discloses a management method of fixing memory, which includes the processes as follows: step1, applies to operating system for a memory area in advance, and initializes memory; step2, according to the size of memory block, finds the corresponding memory pool, and applies for free memory block from the memory pool; if there isn't free memory block, finds whether there is free memory block from superior memory pool until finding a free memory block from the superior memory pool; step3, the finding memory block is broke down into new memory pools, and new generated memory pool information is recoded in list of memory pool, and modifies descriptive information of memory pool; modifies descriptive information of memory pool providing new memory pool; step4, distributes a free memory block form the new memory pool, and releases the memory after finishing using memory. The invention achieves dynamic allocation of memory, and avoids causing to apply memory for failure and abnormal system.

Description

technical field [0001] The invention relates to a memory management method in an embedded real-time operating system in the computer field. Background technique [0002] The memory management in the embedded real-time operating system is an important factor to ensure the real-time performance of the application. In order to improve real-time performance and avoid memory fragmentation, the memory management method of fixed memory blocks is often used. As shown in Figure 1, first apply for a large memory area from the operating system, and then divide the memory area into several sub-areas (memory pool 1, memory pool 2, memory pool 3, memory pool 4, and memory pool 5). A memory pool consists of several memory blocks of the same size. The application and release of memory is realized through system calls. [0003] Therefore, the prior art memory pool allocation method just has the following deficiencies: [0004] 1. The size of each memory pool is estimated based on experie...

AI Technical Summary

Problems solved by technology

[0004] 1. The size of each memory pool is estimated based on experience. Once the estimation is wrong, the system may crash due to insufficient memory;

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