在嵌入式平台中充分利用GPU

Question

My platform is Ubuntu running ob Exynos4412CPU which has the Mali400GPU. I would like to do some computer vision using OpenCV and OpenGL, I'm also going to do some fragment shaders. My question is what is the fastest way to copy the contents from the GPU to the CPU, which is really slow on my platform using glreadpixels. Is it beneficial to utilize glreadpixels in its own thread or use OpenMP ? Suggestions are welcome please :).

Answer 1

The Exynos 4412 doesn't have separate CPU and GPU memory at the hardware level; it's all the same RAM and physically accessible by both. Thus, there is likely to be some way to access the GPU's portion of the memory directly from the CPU.