Every vertical blank, the hypervisor DMAs this buffer to the GPU memory, and then flips the GPU's visible page to the new data synchronously with the vertical blank signal.
对于垂直方向上的每个空格来说，管理程序都会采用 DMA 方式将自己的缓冲区读到 GPU 的内存中，然后将 GPU 的可视页刷新为与垂直空格信号同步的数据。
The is_dumping global variable is used to stop other threads from changing the contents of the buffer once a signal has been received to dump data.
一旦接收到了转储数据的信号，将使用 is_dumping 全局变量禁止其他的线程更改该缓冲区的内容。
The key technique for the data buffer storage in multi-type video signal conservation and transmission is discussed emphatically.
文章重点讨论了该系统多制式数字视频信号存储与传输中数据缓存的关键技术。
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