Memory management method and device for multiprocess system

Abstract

The invention discloses a memory management method and device for a multiprocess system. The memory management method and device for the multiprocess system are used for optimizing a memory management mode of the system and improving the memory utilization rate and the success rate of memory distribution. The memory management method for the multiprocess system comprises the steps that integrated planning of memory blocks is carried out by the memory management device by means of a shared memory pool, application and release of the memory blocks in the memory pool by multiple processes are distinguished according to identification information and mutually exclusive semaphore of the processes, the multiple processes can have access to memory blocks with the same specification without mutual interference, therefore, optimized memory management can be achieved, resource consumption caused by repeated application to an operation system due to the fact that the memory is not sufficient is avoided, a large amount of memory fragmentation is prevented from being generated in the operation system, and the memory utilization rate and the success rate of memory distribution of the system are effectively improved.

Description

technical field [0001] The invention relates to memory management technology, in particular to a memory management method and device in a multi-process system. Background technique [0002] In an operating system, when running a software product, operations on memory are usually involved. In the early operating system, the software module directly applied for and released the memory of the operating system, so long-term operation would cause memory fragmentation in the operating system, resulting in subsequent memory application failure. In order to avoid this situation, a memory management module is added. The memory management module encapsulates a layer of memory management on top of the operating system. When the memory management module is initialized, it applies for memory from the operating system to create a memory pool according to the configured memory block specifications and the number of memory blocks ( i.e. a managed collection of memory blocks). When the sof...

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Problems solved by technology

[0010] (1) Each memory management module will create a corresponding memory pool according to the specifications of the initially configured memory blocks and the number of memory blocks. However, due to the limited overall memory of the system, in each memory pool, the specifications of the memory blocks Cannot be exhaustive, then, in a memory pool, if the specification of a memory block is not configured, the software module will fail to apply for memory

[0011] (2) Since the system memory is allocated among multiple memory pools, the specification and quantity of memory blocks allocated in each memory pool are limited, and when the number of memory blocks in the memory pool is insufficient, it is necessary to continue Applying for memory in the operating system, and calling the corresponding function to apply for memory from the operating system, this process is more complicated and time-consuming

[0014] (5) After the memory block requested by a certain process is released, if the released memory block is not used for a long time in the free list of this process, then other processes cannot use this memory block, which will cause a waste of free memory blocks

[0015] (6) After a process fails and restarts, if you apply for a memory block according to the memory configuration information, other processes may apply for too many memory blocks, resulting in the failure of this process to apply for a memory block

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