can the gpu access memory allocated by malloc?

Question

I am trying to check if the GPU can access the memory allocated by the system allocator (e.g malloc).

I am using Cuda 10.2 and the documentation mentions that the device should support pageableMemoryAccessUsesHostPageTables. but when I checked it on my machine, it returns 0.

I want to know if this feature is supported on x86?

nvidai-smi

Answer 1

It's not available on x86. It is available on Power9. You may wish to investigate managed memory (perhaps with oversubscription), or pinned host allocation using cudaHostAlloc