Method and device for distributing memory

Abstract

The embodiment of the invention discloses a method and device for distributing memory. The method for distributing the memory comprises the following steps that a memory request of a target task is received; the capacity of the distributed memory is determined according to the capacity of requested memory; whether a free memory block meeting the capacity of the distributed memory exists in a first memory pool or not is determined; if yes, the memory block with the capacity of the distributed memory is distributed to the target task in the first memory pool; otherwise, the memory block with the capacity of the distributed memory is distributed to the target task in a preserved second memory pool under the condition that the priority of the target task is higher than a preset priority threshold value. According to the technical scheme, when the memory in the first memory pool is used up, the system can distribute the preserved memory to a critical task with higher priority, the basic management capacity and diagnosis capacity of the system are guaranteed, and the safety and reliability of the system are improved.

Description

technical field [0001] The invention relates to the technical field of computers, in particular to a memory allocation method and device. Background technique [0002] In a real-time operating system, such as the vxWorks operating system, a dynamic memory management mechanism is usually used. The operating system allocates memory to tasks that require memory. After the task is completed, the memory is released for the operating system to continue allocating memory to Other tasks with memory requirements. [0003] In the prior art, memory applications for all tasks are equal, and the operating system maintains a memory resource pool. As long as a memory application is received, a memory block in the memory resource pool that is the same size as the application is allocated to the corresponding task. [0004] There are certain problems with this method. If a task has an abnormal memory application and the memory is exhausted, the operating system cannot allocate memory to oth...

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Problems solved by technology

[0004] There are certain problems with this method. If a task has an abnormal memory application and the memory is exhausted, the operating system cannot allocate memory to other tasks that have memory requirements. That is to say, in this case, all All memory-demanding tasks will be affected, causing the operating system to crash, affecting the security and reliability of the operating system

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