Abstract: MMU/TLB（Memory Management Unit/Translation Lookaside Buffer） is an important factor to impact operating system’s performance. For the default configuration of E500 Core’s TLB under VxWorks OS, there is a problem of low efficiency, and more TLB missing. In view of the characteristics of E500 Core TLB and memory layout of VxWorks system, one method to optimize the TLB configuration is raised. The examination result shows that this optimization method has better performance.

Key words: E500 core, Translation Lookaside Buffer（TLB）, VxWorks

摘要： MMU/TLB（存储器管理单元/转换旁置缓冲区）是影响嵌入式操作系统实时性能的关键因素之一。VxWorks嵌入式操作系统为E500处理器内核的TLB默认配置有效率低、易发生缺页中断的问题。针对E500处理器内核TLB的架构特点和VxWorks系统运行时的内存布局，提出了VxWorks系统下优化E500 TLB配置的方法；实验表明，该优化方法降低了CPU利用率，提高了系统的性能。

关键词: E500处理器内核, 转换旁置缓冲区, VxWorks