About Block-Shared-Memory

Accelerated Computing CUDA CUDA Programming and Performance
1

Hello everyone, I’m a rookie and have some questions about sharedMemPerBlock

My GPU is GeForce GTX 750 Ti， Cuda v9.2

I call the function cudaGetDeviceProperties , get the value of struct cudaDeviceProp, in which the member variable sharedMemPerBlock is equal to 49152， variable type is unsigned__int64, so I think the size is 49152 * 8 = 393216 bytes

but I try to use the Block-Shared-Memory， it can’t be bigger than 49152 bytes ，I am confused here

can someone help me? thanks a lot:)

2

Yes, it’s 49152 bytes.

[url]https://docs.nvidia.com/cuda/cuda-runtime-api/structcudaDeviceProp.html#structcudaDeviceProp_182ec4c5e244addb9cd57f5b9da0eaca7[/url]

3

Thank you for your quick response.

I realize that the variable type unsigned__int64 is for member variable sharedMemPerBlock itself, not the Block-Shared-Memory