嵌入式Linux平台内存管理方案  

Memory Management Solution in Embedded Linux Systems

作　　者：高超[1,2] 韩锐 倪宏 

机构地区：[1]中国科学技术大学自动化系,安徽合肥230027 [2]国家网络新媒体工程技术研究中心,北京100190

出　　处：《小型微型计算机系统》2011年第4期614-618,共5页Journal of Chinese Computer Systems

基　　金：国家科技支撑计划课题项目(2008BAH28B04)资助;上海科委科研项目(08dz150010B)资助

摘　　要：不同的动态内存分配算法往往应用于不同场景、面向于不同业务,因此衡量指标不一,性能各异.针对多模式、多业务的数字电视终端,本文提出了一种嵌入式L inux平台内存管理方案,深入剖析了共享内存的原理及方法,采用共享内存技术支撑多业务开展,同时实现了一种使用二级索引策略的动态内存分配算法,复杂度为O(1),相比其他经典算法,实时性高而碎片率低,仿真性能良好,并在嵌入式平台上实施,取得了不错的效果.Dynamic storage allocation （DSA） algorithms are implemented in different environments and services, where measurements and performances are differ from each other. In this paper, we proposed a memory management solution for Set-Top Box （STB） with multi-modes and multi-services in order to achieve a high performance. We analyzed the principles and methods of memory sharing technology, and carried out multi-services with this technology. Meanwhile, we developed a new DSA using two levels of index, which took O（ 1 ） time of running. Comparing with other well-known DSAs, this DSA had acceptable timing behavior and produced low fragmentations. We got satisfactory results both in the experiment and in real embedded systems.

关 键 词：内存管理 内存分配算法 LINUX 共享内存 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]