CudaMallocPitch and CudaMemcpy2D/cudaMalloc

Accelerated Computing CUDA CUDA Programming and Performance
1

Hi,
I am new to Cuda Programming.
I am trying to allocate memory for image size 1366x768 using CudaMallocPitch and transferring data to Device using cudaMemcpy2D/ cudaMalloc . But it is giving me segmentation fault.

When I tried to do same with image size 640x480, its running perfectly.

Can anyone please tell me reason for that.

Thanks,
Tushar

2

Hard to say without code.
Most likely an alignment issue in your code resulting in an out of bounds memory access.
E.g. 1366 is not a multiple of 4 but 640 is.