"Uploading" the same texture3D-object to different effects

1

Hello,

assume I have a texture3D-object and two different effect files which have a uniform/global texture3d-variable defined in it respectively.

If I load two effect-files and set (=upload) both effect’s global variables to the same texture3D-object, is that particular texture3D-object sent twice to the GPU or once?

My guess is the following: The moment I create/load a texture3D-object, gpu-memory is already allocated for it. Setting a texture3D-parameter in an effect only sets an integer that refers to that given texture3D in the gpu-memory, meaning, it won’t get uploaded to the gpu twice, rather setting a texture3D-object is the same thing as setting an int (memory address).
Is this true, to some extend?

Best regards

_

2

Yes, the texture is set by reference. Only when you call SetData() actual texture data will be uploaded.

3

In addition to that (although it may not seem related to this initial question): Would - performance-wise - cuda’s unified memory concept out-perform setData to mimic data-synchronization between CPU and GPU?

Best regards!