Memory pool managing method

Abstract

The internal memory pool managing method includes the following steps: setting son memory pools, requesting certain amount of gen memory blocks in the same size for each of the son memory pools, dividing each of the gen memory blocks into several mem memory blocks in the same size and setting the un-divided memory units as OS memory pools. When some application module requests memory, the virtual operation system judges first whether the requested memory size is larger than the size of one mem memory block. If so, the memory blocks are distributed directly from the OS memory pool for the application module; or else, corresponding son memory pool is found out and judged for whether to exist idle mem. If so, the idle mem in the son memory pool is assigned to the application module; or else, the virtual operation system requests first one gen dynamically from the OS memory pool for the son memory pool, assigns the idle mem in the gen to the application module and marks the assigned mem as being occupied.

Description

technical field [0001] The invention relates to the technical field of memory management, in particular to a memory pool management method. Background technique [0002] At present, in order to avoid memory fragmentation caused by directly using system calls to allocate memory, existing virtual operating systems have a set of memory management mechanisms. The memory management mechanism generally divides all the memory of the underlying operating system into memory pools of different sizes at one time, and then divides the memory in each memory pool into fixed memory blocks of the same size. Normally, the size of a memory pool is a power of 2 bytes, and the size of a memory pool is twice the size of its left neighbor's memory pool. For example, a virtual operating system has N memory pools. Generally, each memory pool The sizes of the memory blocks in are 2, 4, 8, 16, 32, 64...1024, 2048 bytes.... Since the parameters such as the number of memory pools, the size of memory ...

AI Technical Summary

Problems solved by technology

[0005] The defect of the existing memory management mechanism is that the number of each type of memory pool and the number of memory blocks in each memory pool are pre-divided before the virtual operating system runs, so that when the application module applies for memory, if a certain size If the memory block has been consumed, the system may be abnormal because the application module cannot apply for memory. Even if the virtual operating system can allocate a memory block to the application module from a larger memory pool, the system memory will be wasted; if If the application module wants to apply for a super large memory block that cannot be provided by all memory pools, the system will be abnormal because the application module cannot apply for memory

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