面向嵌入式應(yīng)用的網(wǎng)絡(luò)性能提升的研究
[Abstract]:With the development of computer hardware, more and more embedded devices are applied in the field of high demand, and the performance of network communication also has higher requirements. Although many high-performance embedded hardware platforms have been developed at present, today's mature embedded network protocol stack can not use these hardware resources well, resulting in no significant improvement in network performance. How to improve the network performance of embedded applications has become an important issue in the development of embedded applications. Based on the high performance embedded system, the paper optimizes the key technology in the implementation of the embedded network protocol stack, and improves the real-time performance and throughput of the network protocol stack, so as to improve the network performance of the embedded application. This paper makes a theoretical evaluation of these key technologies, and chooses the LwIP protocol stack and the RT-Linux real-time operating system as the research object, and on this basis, the practice is carried out. in practice, the process model of the network protocol stack is designed into two-layer structure, the interface layer is a process, the network layer and the above protocol layer are a process, and in the case of fully utilizing the parallel mechanism, the speed of processing data inside the protocol stack is improved; the static division and the dynamic allocation of the buffer area not only reduce the time consumption on the management memory, but also reduce the generation of the memory chips, In the management of the TCP timer, the efficiency of the processing timer is improved by designing a two-layer time wheel table for the time, and the time required for processing the timer is effectively reduced. The Select interface is optimized to reduce the memory consumption due to the transfer of data between the kernel space and the user's space, and to reduce the time consumed to determine the state of the file descriptor. At last, the test of the basic communication function of the network protocol stack before and after the optimization and the test of the network performance are carried out. The test results show that the network performance of the optimized network protocol stack is obviously improved.
【學(xué)位授予單位】:浙江理工大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2016
【分類號(hào)】:TP368.1
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