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文章针对双处理器设备间的数据通信提出了基于PCIe非透明桥的高速传输系统的设计方法。该方法应用于视频转码设备,实验结果表明当转码设备作为外设与PC主机进行通信时,采用多路虚拟DMA方法的数据传输总带宽可以稳定的达到1100MB/s,为实现多路实时转码提供了前提保证。文中还重点介绍了虚拟DMA通道的实现、双系统间通信模型的设计及传输系统性能优化分析。
This paper presents a design method of high speed transmission system based on non-transparent PCIe bridge for the data communication between two processors. The method is applied to video transcoding equipment. The experimental results show that when the transcoding equipment is used as a peripheral to communicate with a PC host, the total data transmission bandwidth using multi-path virtual DMA method can reach 1100MB / s steadily. In order to achieve multiple real- Transcoding provides the premise of guarantee. The article also focuses on the realization of the virtual DMA channel, dual-system communication model design and transmission system performance optimization analysis.