Currently I have a PC with 3 GPUs.
I created a parent process and created two child processes.
Each subprocess uses a different GPU to copy the GPU image.
By the way, I noticed that when copying an image using cudaMemcpy,
I use the GPU used to draw the screen.
Please let me know how to allow different processes
to successfully synchronize the GPU memory copy.
Is cudaSetDevice a function that can only be used within one process?