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。
Just draw a vertical line down the middle of a blank page.
拿出一张空白的纸，在中间画一条竖线。
The main reasons of the edge cracking are: expanding of horizontal cracks (including deep oscillation imprint) and fine vertical cracks of cast blank during reheating and hot rolling;
板卷产生边部裂纹的主要原因是：连铸坯表面边部横裂纹（包括深的振痕）和边部的细小纵裂纹，在加热和轧制过程中不断扩展；
The main reasons of the edge cracking are: expanding of horizontal cracks (including deep oscillation imprint) and fine vertical cracks of cast blank during reheating and hot rolling;
板卷产生边部裂纹的主要原因是：连铸坯表面边部横裂纹（包括深的振痕）和边部的细小纵裂纹，在加热和轧制过程中不断扩展；
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