cuMemcreate CU_MEM_ALLOCATION_TYPE_PINNED

Accelerated Computing CUDA CUDA Programming and Performance
1

Hello,

I’m trying to understand how to use low-level virtual memory APIs.
While I’m reading this post,
https://developer.nvidia.com/blog/introducing-low-level-gpu-virtual-memory-management/
there exists the allocation type CU_MEM_ALLOCATION_TYPE_PINNED.
I wonder what does Pinned memory means in device memory.
Inside of document, CUDA Driver API :: CUDA Toolkit Documentation
it says that this allocation can’t migrate.
Does this mean that this memory can’t be copied out to the host memory by cudaMemcpy?

Thanks

2

Pinned in this context simply means that this allocation is always located on that specific device. It does not affect memory copies.

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