WebitOS内核的实现机制及性能分析  

Realization Mechanism and Performance of WebitOS Kernel

作　　者：张希元[1] 赵海[1] 孙佩刚[1] 罗玎玎[1] 

机构地区：[1]东北大学信息科学与工程学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2006年第4期394-397,共4页Journal of Northeastern University(Natural Science)

基　　金：国家发改委高技术产业化示范工程资助项目(20012167);国家科技部火炬计划项目(2002EB010154)

摘　　要：描述了WebitOS的体系结构,WebitOS采用模块化分层结构设计,包含设备驱动、实时内核及轻型TCP/IP协议栈等模块,功能完备;分析了WebitOS内核的实现机制:实时调度采用了基于优先级抢占的多任务调度机制,内存管理采用了最佳匹配的分配算法和边回收边整理的回收算法.在此基础上,从内核运行的时空开销、支持EI应用等角度对WebitOS内核的性能进行了测试.结果表明,WebitOS内核是一个实时、精简且高效的内核,特别适用于资源受限环境下开发嵌入式实时应用.Describes the architecture of WebitOS. As a hierarchically modularized system with perfect function, WebitOS consists of several modules for device driver, real-time kernel and TCP/IP protocol, etc. Analyzes the realization mechanism of WebitOS kernel： employs a priority-based preemptive multi-task scheduler for real-time scheduling and uses the best-fit allocation algorithm and collection-coalition algorithm for memory management. Then, tests the performance of WebitOS kernel in view of space-time costs andsupport to El application. The results show that WebitOS kernel is a real-time, simplified and effective one that is specially adoptable to embedded applications in resource-constrained environment.

关 键 词：嵌入式操作系统 硬实时 嵌入式INTERNET 抢占式调度 最佳分配算法 

分 类 号：TP316.2[自动化与计算机技术—计算机软件与理论]