Memory management device and method oriented to multi-core system

Abstract

The invention provides a memory management device and method oriented to a multi-core system. The device comprises a private memory management module, a fair synchronization control module and a global memory management module, wherein the private memory management module manages a private memory area and is mainly used for applying for small-block memories, and each core corresponds to one private memory area, adopts an unlocked design and avoids the expenditure of a lock; the fair synchronization control module guarantees that fair synchronization can be realized when multiple cores retrievememory from the global memory management module; and the global memory management module manages a global memory area, provides service for the private memory management module, is in charge of the application of large-block memory, and carries out memory acquisition from the system when the memory is insufficient. By use of the device, a private unlocked technology and a memory block buffer technology are adopted and cooperated with a fair synchronization mutual exclusion algorithm to guarantee memory access efficiency and resource fighting fairness. A fair synchronization mechanism is addedto the avoid unfairness of memory resource competition among cores, and meanwhile, memory access efficiency is guaranteed.

Description

technical field [0001] The invention relates to the technical field of multi-core processor memory management, in particular to a multi-core system-oriented memory management device and method. Background technique [0002] A multi-core processor can be regarded as a system-on-a-chip that integrates multiple general-purpose CPUs and some functional components into one chip. The memory management subsystem is the basis for ensuring the normal operation of the entire system, and provides a basic guarantee for the normal operation of other modules. In single-core system memory management, you need to pay attention to memory fragmentation, allocation efficiency and other issues, while in multi-core memory management, it also involves some problems that are different from single-core memory management, such as shared cache invalidation, mutual exclusion access, and inter-core fragmentation Wait. [0003] Existing mature memory management methods, such as Jemalloc, Ptmalloc, Tcm...

AI Technical Summary

Problems solved by technology

Although Tcmalloc has improved in this regard, another problem will inevitably arise: the fairness of competition for resources between multiple tasks

This creates a "starvation" phenomenon, multi-tasking work evolves into single-tasking work, and the efficiency of the multi-core system is reduced

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