Question

I read a lot about handling 2D arrays in CUDA and i think it is necessary to flatten it before sending it to GPU.however can I allocate 1D array on GPU and access it as 2D array in GPU?I tried but failed my code looks like follows:

__global__ void kernel( int **d_a )
{ 

   cuPrintf("%p",local_array[0][0]);
}

int main(){

    int **A;

    int i;

    cudaPrintfInit();

    cudaMalloc((void**)&A,16*sizeof(int));

    kernel<<<1,1>>>(A);

    cudaPrintfDisplay(stdout,true);

    cudaPrintfEnd();
}

Answer 1

This is how I fixed problem
I cudaMalloc in usual way but while sending pointer to kernel i’m typecasting it to int(*)[col],and this is working for me