VxWorks5.5在龙芯2号处理器的移植和性能分析  

Transplantation of VxWorks 5.5 on Godson2 Processor and Its Performance Analysis

作　　者：陈学兵[1] 沈毅南[1] 张振华[1] 

机构地区：[1]江苏自动化研究所,江苏连云港222006

出　　处：《计算机测量与控制》2012年第9期2542-2545,共4页Computer Measurement &Control

摘　　要：通过分析VxWorks5.5启动流程,根据龙芯2号处理器的特征,提出BSP移植的基本思路,从中断管理、Cache库、地址空间的扩展、PCI库等方面给出了移植的关键解决方法,实现了VxWorks下图形模式下的PC控制台,通过为屏幕创建副本缓冲区和利用GPU的加速特性分别对PC控制台的滚屏性能进行显示优化,测试表明平均性能分别提升到约11.90倍和约166.67倍;最后从上下文切换和中断响应时间等两方面对BSP包的实时性能进行分析,试验表明基于龙芯2E的VxWorks系统可满足一般实时系统的需要,为嵌入式实时应用提供参考。After analyzing the boot sequence of VxWorks 5.5, according to the characteristics of the Godson2 processor, a basic trans planlation method is proposed and some critical solutions are given for the interrupts management, cacheLib, address space extension, PCIIJib and so on, a PC console in graphic mode is implemented, and an optimization method using shadow buffer of the screen and the other one using acceleration characteristics of the GPU are given for improving the display speed of the scrolling screen on the PC console. Tests show that the respective average performance is increased to about 11.90 times and 166.67 times. Lastly, the context switching and interrupt response time are chosen to measure the real time performance of the system. Experimental results show that the VxWorks system based on Godson 2E can meet the requirement of the general real-time system, and provide a reference for embedded real time applications.

关 键 词：龙芯处理器 VXWORKS BSP 内存管理 中断管理 PCI 

分 类 号：TP303[自动化与计算机技术—计算机系统结构]