How do I determine available device memory in OpenCL?

Question

I would like to know how much free memory there is on my device before allocating buffers. Is this possible? I know there\'s CL_DEVICE_GLOBAL_MEM_SIZE for total

Answer 1

No, there is no way, and there is no need to know it, GPU memory can be virtualized and the driver will swap in/out memory from the GPU when it is/not needed.

Answer 2

You can use GL_NVX_gpu_memory_info on nVidia.