CODEWITHSUNDEEP
cuda
username_4567
username_4567

Reputation: 4903

Copying 2D arrays in CUDA

I'm trying to copy 2D array from CPU to GPU.From host side i'm sending base pointer of 2D array,P is number of elements in one dimension

 int *d_a;

 cudaMalloc(d_a,P*P*sizeof(int));

 copyKernelHostToDevice((int(*)[P])d_a,(int(*)[P])hAligned_a);

 copyKernelHostToDevice((int(*)[P])d_b,(int(*)[P])hAligned_b);


 inline void copyKernelHostToDevice(int (*A)[P],int (*B)[P]){

      for(int i=0;i<P;i++)
      cutilSafeCall(cudaMemcpyAsync(A[i],B[i],P*sizeof(int),cudaMemcpyHostToDevice));

}

but above code is giving me runtime error

cudaSafeCall() Runtime API error 11: invalid argument.

Am I missing something? P is significantly large...arnd 2048

Upvotes: 0

Views: 1781

Answers (1)

talonmies
talonmies

Reputation: 72348

It looks like d_a isn't a valid device pointer, because your cudaMalloc call looks to be incorrect. It should be something like this:

int *d_a;
cudaMalloc((void **)&d_a,P*P*sizeof(int));

Upvotes: 1

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