| 嵌入式系统网络实时性能的优化 |
| |
| 引用本文： | 于晓,王家礼.嵌入式系统网络实时性能的优化[J].电子测量与仪器学报,2009,23(3):60-64. |
| |
| 作者姓名： | 于晓 王家礼 |
| |
| 作者单位： | 1. 西安电子科技大学机电工程学院,西安,710071;西安石油大学计算机学院,西安,710065
2. 西安电子科技大学机电工程学院,西安,710071 |
| |
| 基金项目： | 电子测试技术国家重点实验室基金 |
| |
| 摘 要： | 嵌入式系统是资源受限的系统。在分析Linux对嵌入式系统网络实时性支持不足的基础上,提出了基于零拷贝技术的网络实时性能优化策略。采用虚拟内存操作方法消除内核空间和用户空间之间的数据拷贝,来减轻CPU的通信负担.用静态分配网络缓冲区代替原系统的动态分配。本文还提出了一种定长的分包机制,既可降低网络传输的延迟时间,同时也保证了1个数据包不会跨越2个页面的问题。实验结果表明：经过优化的网络系统的实时性能得到了明显的改善。
|
| 关 键 词： | 嵌入式系统 零拷贝 分包 |
Real-time performance optimization of network for embedded system |
| |
| Yu Xiao,Wang Jiali.Real-time performance optimization of network for embedded system[J].Journal of Electronic Measurement and Instrument,2009,23(3):60-64. |
| |
| Authors: | Yu Xiao Wang Jiali |
| |
| Affiliation: | 1. College of Mechanism and Electronics;Xi'dian University;Xi'an 710071;China;2. College of Computer;Xi'an Shiyou University;Xi'an 710065;China |
| |
| Abstract: | Embedded system is usually resource limited in terms of processing power, memory and power consumption,thus embedded system should be designed to make the best of limited resources. After the lack of real-time performance in Linux network for embedded system is analyzed, real-time performance optimization methods based on zero-copy mechanism are proposed. In order to decrease the processing overhead,page remapping mechanism to eliminate the data copies between the user space and the kernel space is used.On ... |
| |
| Keywords: | embedded systems zero-copy fragmentation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
